TWIN DISC 1022763_ 01_08_CD

Document Number: 1022763

TWIN DISCINCORPORATED

PowerTake-off

Model: SP-114 Series SPE-114 Series SP-214 Series SPE-214 Series SP-314 Series SPE-314 Series SP-314SB Series RFD-214 Series RFD-314 Series

Service Manual

Red Front_cover.indd 1 9/1/2010 3:05:17 PM

NOTICETwin Disc, Incorporated makes no warranty or guaranty ofany kind, expressed, implied or otherwise, with regard to theinformation contained within this manual. Twin Disc,Incorporated has developed this manual through researchand testing of the information contained therein. Twin Disc,Incorporated assumes no responsibility for any errors thatmay appear in this manual and shall not be liable under anycircumstances for incidental, consequential or punitivedamages in connection with, or arising out of, the use of thismanual. The information contained within this manual issubject to change without notice.

Document Number1022763

IssuedJanuary, 2008

Power Take-offService Manual

REVISION AND REISSUE DATA

Issued January, 2008

BEFORE YOU START

This manual replaces:#1015708 for use with model SP114P Series,#1021088 for use with model SP114P Series#1015998 for use with model SP214OP Series#1015999 for use with model SP114P Series,#1017533 for use with model SP214IL, SP314IL Series#1015486 for use with model SP314P Series,#1016066 for use with model SPE114P, SPE214P, SPE314P Series#1016619 for use with model SP314SB Series,#1020992 for use with model SP314P Series#1019024 for use with model RFD214 & RFD314 Series

LIMITED TWIN DISC GENERAL WARRANTY, LIMITATIONS OF REMEDIES AND LIMITATION OF OTHER WARRANTIES

A. Twin Disc, Incorporated warrants all assembled products and parts (except component products or parts on which written warranties are issued by the respective manufacturers thereof and are furnished to the original customer, as to which Twin Disc, Incorporated makes no warranty and assumes no liability) against defective materials or workmanship. For products and parts other than Rockford power take-offs, such warranty shall extend for a period of twenty-four (24) months from the date of original shipment by Twin Disc, Incorporated to the original customer, but not to exceed twelve (12) months of service or two thousand (2,000) hours of service, whichever occurs first. This is the only warranty made by Twin Disc, Incorporated and is in lieu of any and all other warranties, express or implied, including the warranties of merchantability and fitness for a particular purpose and no other warranties are implied or intended to be given by Twin Disc, Incorporated. The original customer does not rely upon any tests or inspections by Twin Disc, Incorporated or on Twin Disc, Incorporated's application engineering.

B. In consideration of the Limited Twin Disc General Warranty (hereafter called warranty) and price Twin Disc,

Incorporated charges (which reflects Twin Disc, Incorporated's limited liability), the exclusive remedy provided by Twin Disc, Incorporated whether arising out of warranty within the applicable warranty period as specified, or otherwise (including tort liability), shall at the sole option of Twin Disc, Incorporated be either the repair or replacement of any Twin Disc, Incorporated part or product found by Twin Disc, Incorporated to be defective (or equivalent credit). Under no circumstances, including a failure of the exclusive remedy, shall Twin Disc, Incorporated be liable for economic loss, consequential, punitive or incidental damages. The above warranty and remedy are subject to the following terms and conditions:

1. Complete parts or products upon request must be returned transportation prepaid and also the claims submitted to Twin Disc, Incorporated within sixty (60) days after completion of the in warranty repair.

2. The warranty is void if, in the opinion of Twin Disc, Incorporated, the failure of the part or product resulted from abuse, neglect, improper maintenance or accident.

3. The warranty is void if any modifications are made to any product or part without the prior written consent of Twin Disc, Incorporated.

4. The warranty is void unless the product or part is properly transported, stored and cared for from the date of shipment to the date placed in service.

5. The warranty is void unless the product or part is properly installed and maintained within the rated capacity of the product or part with installations properly engineered and in accordance with the practices, methods and instructions approved or provided by Twin Disc, Incorporated.

6. The warranty is void unless all required replacement parts or products are of Twin Disc origin or are Twin Disc authorized replacement parts, and otherwise identical with components of the original equipment. Replacement parts or products not of Twin Disc origin are not warranted by Twin Disc, Incorporated.

C. As consideration for this warranty, the original customer and subsequent purchaser agree to indemnify and hold Twin Disc, Incorporated harmless from and against all and any loss, liability, damages or expenses for injury to persons or property, including without limitation, the original customer's and subsequent purchaser's employees and property, due to their acts or omissions or the acts or omissions of their agents, and employees in the installation, transportation, maintenance, use and operation of said equipment.

D. Only a Twin Disc, Incorporated authorized factory representative shall have authority to assume any cost or expense in the service, repair or replacement of any part or product within the warranty period, except when such cost or expense is authorized in advance in writing by Twin Disc, Incorporated.

E. Twin Disc, Incorporated reserves the right to improve the product through changes in design or materials without being obligated to incorporate such changes in products of prior manufacture. The original customer and subsequent purchasers will not use any such changes as evidence of insufficiency or inadequacy of prior designs or materials.

F. If failure occurs within the warranty period, and constitutes a breach of warranty, repair or replacement parts will be furnished on a no charge basis and these parts will be covered by the remainder of the unexpired warranty which remains in effect on the complete unit.

*Note The Above constitutes the basic Twin Disc, Incorporated General Limited Warranty and may be supplemented by additional published warranty terms dependent upon the product involved. Supplementary warranty terms are available upon request.

December 14, 2007 TDWP0001 rev 2008

TimT

7

Twin Disc, Incorporated Table of Contents

Power Take-Off Service Manual #1022763

Table of Contents

Introduction .......................................................... 11General Information ............................................................................ 11Replacement Parts .............................................................................. 12Preventive Maintenance/Troubleshooting......................................... 13Safety ................................................................................................... 14Sources of Service Information ......................................................... 15Warranty .............................................................................................. 16

Description and Specifications ...........................17General Information ............................................................................ 17Finding the Twin Disc Power Take-Off Model Number and Serial

Number............................................................................................ 18Identifying the Twin Disc Power Take-off From Its Model Number.. 19Twin Disc Power Take-Off Reference Listing .................................... 20Twin Disc Power Take-Off Reference Listing (continued)................ 21Twin Disc Power Take-Off Reference Listing (continued)................ 22Twin Disc Power Take-Off Reference Listing (continued)................ 23Identifying the SAE Housing Size ...................................................... 24Specifications...................................................................................... 25Twin Disc PTO Support Plate Specifications .................................... 29Wear Limits.......................................................................................... 30Torque Values for Fasteners .............................................................. 35

Installation ............................................................39Installation Tips ................................................................................... 39Prior to Installation (Ref: SAE J1033 and J617) ................................ 44Drive Ring Installation ........................................................................ 48Ball-Type Pilot Bearing Installation.................................................... 49Roller-Type Pilot Bearing Installation ................................................ 50PTO Installation to Engine or Driving Member ................................. 52Hand Lever Position for Twin Disc Power Take-Offs........................ 57Model SPE114, SPE214 and SPE314 Series Arm Adjustment Proce-

dure ................................................................................................. 58

8

Twin Disc, IncorporatedTable of Contents


Position and Measure Alignment of the Sheave ............................... 59Allowable Side Loads ......................................................................... 60Alignment - U-Joint-Type Installation ................................................ 74Setting Up Air Engagement on Twin Disc Power Take Offs ............. 76

Operation ..............................................................79General Information ............................................................................ 79Clutch Engagement Procedure .......................................................... 80

Maintenance .........................................................83Maintenance Tips ................................................................................ 83Lubrication .......................................................................................... 86Clutch Adjustment .............................................................................. 89Friction Plate Replacement ................................................................ 90Field Adjustment - Tapered Roller Bearing End Play (side-loaded pto

applications) (Except SB Models) ................................................. 91Field Adjustment - Tapered Roller Bearing End Play - (In-Line pto

applications) ................................................................................... 92Field Adjustment - Checking Bearing End Play - Model SP314SB

Series Only...................................................................................... 93

Disassembly .........................................................95Power Take-off Removal From The Engine ....................................... 96Clutch Removal ................................................................................... 98Clutch Disassembly ............................................................................ 99Bronze Collar Disassembly ................................................................ 99Ball Bearing Collar Disassembly ....................................................... 99Remove the Operating Shaft and Throwout Yoke........................... 101Clutch Shaft and Housing Disassembly - Configuration A ............ 103Clutch Shaft and Housing Disassembly - Configuration B ............ 105Clutch Shaft and Housing Disassembly - Configuration C & D ..... 107Clutch Shaft and Housing Disassembly - Configuration E .............110Clutch Shaft and Housing Disassembly - Configurations F & G ....112Clutch Shaft and Housing Disassembly - Configurations H & I .....114Clutch Shaft and Housing Disassembly - Configuration J .............117

9

Twin Disc, Incorporated Table of Contents


Cleaning and Inspection.................................... 119Cleaning and Inspection ....................................................................119

Assembly.............................................................123Clutch Assembly ............................................................................... 124Clutch Shaft and Housing Assembly - Configuration A ................. 131Clutch Shaft and Housing Assembly - Configuration B ................. 138Clutch Shaft and Housing Assembly - Configurations C & D ........ 145Clutch Shaft and Housing Assembly - Configuration E ................. 154Clutch Shaft and Housing Assembly - Configurations F & G ........ 157Clutch Shaft and Housing Assembly - Configurations H & I ......... 161Clutch Shaft and Housing Assembly - Configuration J.................. 168Install the Operating Shaft and Throwout Yoke. ............................. 171PTO Final Assembly.......................................................................... 173

Illustrations .........................................................177List of Illustrations ............................................................................ 177Parts Identification List - SP114, SPE114, SP214, SPE214, SP314,

SPE314, SP314SB, RFD214 and RFD314 Series ........................ 178Exploded View (SP114, SP214 and RFD214 Series Clutches) ...... 179Exploded View (SP314 and RFD314 Series Clutches) .................. 180Exploded View (Configuration A) ..................................................... 181Exploded View (Configuration B)..................................................... 182Exploded View (Configuration C)..................................................... 183Exploded View (Configuration D)..................................................... 184Exploded View (Configuration E) ..................................................... 185Exploded View (Configuration F) ..................................................... 186Exploded View (Configuration G) .................................................... 187Exploded View (Configuration H)..................................................... 188Exploded View (Configuration I) ...................................................... 189Exploded View (Configuration J) ..................................................... 190Exploded View (SPE114, SPE214 and SPE314 Series Throwout

Mechanism) .................................................................................. 191

10

Twin Disc, IncorporatedTable of Contents


Engineering Drawings .......................................193

SP114P101 Sheet 2 of 2 (Typical Configuration A) ......................... 195

XA7500 (Typical Configuration B) .................................................... 196

SP214P001 Sheet 2 of 2 (Typical Configuration C) ......................... 197

X9845 (Typical Configuration D) ...................................................... 198

SP314P121 Sheet 2 of 2 (Typical Configuration E) ......................... 199

SP214P121 Sheet 2 of 2 (Typical Configuration F) ......................... 200

SP314P123 Sheet 2 of 2 (Typical Configuration G)......................... 201

SP314S106 Sheet 2 of 2 (Typical Configuration H) ......................... 202

SP314S117 Sheet 2 of 2 (Typical Configuration I) ........................... 203

TR435469 Sheet 2 of 2 (Typical Configuration J) ............................ 204

SP214P003 Sheet 2 of 2 .................................................................... 205

SP314P001 Sheet 2 of 2 .................................................................... 206

SP314P005 Sheet 2 of 2 .................................................................... 207

SP114C001 Sheet 2 of 2 .................................................................... 208

SP114C008 Sheet 2 of 2 .................................................................... 209

SP214C001 Sheet 2 of 2.................................................................... 210

SP214C004 Sheet 2 of 2.....................................................................211

SP214C011 Sheet 2 of 2 .................................................................... 212

SP314C001 Sheet 2 of 2.................................................................... 213

SP314C010 Sheet 2 of 2.................................................................... 214

SP314C007 Sheet 2 of 2.................................................................... 215

11

Twin Disc, Incorporated Introduction

Power Take-off Service Manual #1022763

Introduction

General Information

This publication provides the information necessary for the operation andmaintenance of the Twin Disc, Incorporated equipment specified on the coverof this manual. Specific engineering details and performance characteristicscan be obtained from the Product Service Department of Twin Disc,Incorporated, Racine, Wisconsin, USA.

Operation and maintenance personnel responsible for this equipment shouldhave this manual at their disposal and be familiar with its contents. Applyingthe information in the manual will result in consistent performance from theunit and help reduce downtime.

12

Twin Disc, IncorporatedIntroduction


Replacement Parts

Parts Lists

See the engineering assembly drawings in Engineering Drawings, partsidentification and exploded views in the Illustration section to facilitate orderingspare or replacement parts.

Ordering Parts

All replacement parts or products (including hoses and fittings) mustbe of Twin Disc origin or equal, and otherwise identical with componentsof the original equipment. Use of any other parts or products will voidthe warranty and may result in malfunction or accident, causing injuryto personnel and /or serious damage to the equipment.

Renewal parts and service parts kits may be obtained from any authorizedTwin Disc distributor or service dealer.

Parts Shipment

Furnish the complete shipping information and postal address. All partsshipments made from the factory will be FOB factory location, USA. Statespecifically whether the parts are to be shipped by freight, express, etc. Ifshipping instructions are not specified, the equipment will be shipped thebest way, considering time and expense. Twin Disc, Incorporated will not beresponsible for any charges incurred by this procedure.

Twin Disc, Incorporated having stipulated the bill of material number on theunit�s nameplate absolves itself of any responsibility resulting from anyexternal, internal or installation changes made in the field without the expresswritten approval of Twin Disc. All returned parts, new or old, emanating fromany of the above-stated changes will not be accepted for credit. Furthermore,any equipment which has been subjected to such changes will not be coveredby a Twin Disc warranty.

13



Preventive Maintenance/Troubleshooting

Frequent reference to the information provided in this manual regarding dailyoperation and limitations of this equipment will assist in obtaining trouble-free operation. Schedules are provided for the recommended maintenanceof the equipment and, if observed, minimum repairs (aside from normal wear)will result.

In the event a malfunction does occur, a troubleshooting table is provided tohelp identify the problem area and lists information that will help determinethe extent of the repairs necessary to get a unit back into operation.

Lifting Bolt Holes

Most Twin Disc products have provisions for attaching lifting bolts. The holesprovided are always of adequate size and number to safely lift the Twin Discproduct.

These lifting points must not be used to lift the complete power unit.Lifting excessive loads at these points could cause failure at the liftpoint (or points) and result in damage or personal injury.

Select lifting eyebolts to obtain maximum thread engagement with boltshoulder tight against housing. Bolts should be near but should notcontact bottom of bolt hole.

14



Safety

General

Safe practices must be employed by all personnel operating and servicingthis unit. Twin Disc, Incorporated will not be responsible for personal injuryresulting from careless use of hand tools, lifting equipment, power tools, orunaccepted maintenance/operating practices.

Important Safety Notice

Because of the possible danger to person(s) or property from accidents whichmay result from the use of manufactured products, it is important that correctprocedures be followed. Products must be used in accordance with theengineering information specified. Proper installation, maintenance, andoperation procedures must be observed. Inspection should be made asnecessary to assure safe operations under prevailing conditions. Properguards and other suitable safety codes should be provided. These devicesare neither provided by Twin Disc, Incorporated nor are they the responsibilityof Twin Disc, Incorporated.

15



Sources of Service Information

Each series of manuals issued by Twin Disc, Incorporated is current at thetime of printing. When required, changes are made to reflect advancingtechnology and improvements in state-of-the-art.

Individual product service bulletins are issued to provide the field withimmediate notice of new service information.

For the latest service information on Twin Disc products, contact any TwinDisc distributor, or contact the Product Service Department, Twin Disc,Incorporated, Racine, Wisconsin 53405-3698, USA by e-mail [email protected].

Contact information for Authorized Twin Disc Distributors and Service Dealerscan be found on the Twin Disc Web site at: http://www.twindisc.com.

mailto:[email protected]

http://www.twindisc.com

16



Warranty

Equipment for which this manual was written has a limited warranty. Fordetails of the warranty, refer to the warranty statement at the front of thismanual.

17

Twin Disc, Incorporated Description and Specifications


Description and Specifications

General Information

The SP114, SPE114, SP214, SPE214, SP314, SPE314, SP314SB, RFD214and RFD314 Series Twin Disc Power Take-Offs are engine-mounted powertake-offs that use cast iron one-piece or two-piece housings and contain anintegral clutch 14 inches in diameter. The engine drives the clutch through adrive ring that is bolted to the engine flywheel and connected to the clutch throughinternal teeth that mesh with external teeth on the clutch friction plates. Clutchengagement and disengagement for most units is accomplished by use of theexternal hand lever assembly. Some units may use other actuation methods.

Main bearings are lubricated and cooled with oil or grease, depending uponthe design specifications. Most units use pilot bearings that are pre-lubricatedand sealed for life, although some may require periodic relubrication. Thosethat require periodic relubrication are lubricated through a grease fitting locatedin the output end or side of the clutch shaft.

SPE models are designed with release mechanism features and a positiveclearance mechanism to provide �extended service� and �limited attendance�advantages.

18

Twin Disc, IncorporatedDescription and Specifications


Finding the Twin Disc Power Take-Off Model Number and Serial Number

The nameplate identifies the model, bill of material (BOM) and the serial numberof the unit. These numbers are necessary to identify the correct parts for yourPower Take-Off.

BOM No.

S/N

Model No.

Information and

instructions

specific to each

individual PTO.

Figure 1. Representative Instruction Plate

19



Identifying the Twin Disc Power Take-off From Its Model Number

Typical Model Identification Number: SP114P-1

SP 1 14 P - 1

A B C D E

{ { { { {

A. Indicates the type of clutch.SP = Counter balanced, toggle action overcenter clutchSPE = SP model for extended serviceRFD = Rockford design with combination Twin Disc and Rockford designed components

B. Indicates the number of friction plates in the clutch.1 = 1 clutch friction plate2 = 2 clutch friction plates3 = 3 clutch friction plates

C. Indicates the nominal size of the clutch friction plates (inches).14 = 14� diameter (nominal), measured just inside the root of the teeth

D. Indicates the housing design.P = standard (grease lubricated) main bearingsOP = oil lubricated main bearingsIL = main bearings for in-line duty onlySB = straddle bearing design

E. Indicates the S.A.E. housing size.0 = SAE # 0 housing1 = SAE # 1 housing2 = SAE # 2 housing

20



Twin Disc Power Take-Off Reference Listing

The Twin Disc Power Take-Off Reference Listing on the following pages refersto various basic design configuration designations used for the main bearinghousing. These designations are used primarily to simplify explanation of thedisassembly and assembly procedures in this manual. The following chartprovides a general description of the basic features of each configuration andalso provides general information regarding each Twin Disc Power Take-Off.However, always refer to a current BOM for your specific power take-off toinsure that the most up-to-date information is being used.

A B C D E F G H I J

Main Housing and Bearing Carrier

1-piece X X X

2-piece (Separate Items) X X X X X

2-Piece straddle bearing design X X

Assembly of Main Bearings

From opposite ends of shaft X X X X X X

(Both) from one end of shaft X X X X

Retention of Main Bearing(s)

Retained by bearing retainer(s) X X X X X X X X X

Retained by snap ring(s) X

Bearing Retainer

Threaded X X X X X X X

Bolted X

Neither bolted or threaded X X

Both front and rear retainers used X X X

None used X

Retention of Bearing Retainer

Retained by lock tab X X X X X

Retained by snap ring(s) X X

Retained by bolts X X X

Not Applicable X

Main Bearing Adjustment

Rotate bearing retainer X X X X X

No adjustment X X X X X X

Oil Seals in Housing or Brg. Carrier X

Wear Sleeve(s) on Shaft X

Configuration

Feature

21



Twin Disc Power Take-Off Reference Listing (continued)

Gre

as

e

Oil

Bro

nze

Ba

ll

Ca

st

Iro

n

No

du

lar

Main Bearing

Lubrication

Throwout

Collar Type

Pilot Bearing

Type

Drive Ring

TypeMain Bearing

Housing

Configuration

Ba

ll

Ro

lle

r

Facing

Type

Sp

lit

So

lid

Su

pp

ort

Pla

te R

eq

’d

SP114P0 SP114P001 X X X X X A




SP114P1 SP114P103 X X X X A



SP114P1 SP114P107 X X X X A








SP214P0 SP214P001 X X X X X X C

SP214P0 SP214P002 X X X X X C

SPE214P0 SP214P003 X not used X X X X C


SP214P0 SP214P006 X X X X C







SP214P1 SP214P109 X X not used X X B








SP214IL1 SP214P121 X X not used X X X F


SP214OP1 SP214P125 X X X X X X D





22




Gre

as

e

Oil

Bro

nze

Ba

ll

Ca

st

Iro

n

No

du

lar

Main Bearing

Lubrication

Throwout

Collar Type

Pilot Bearing

Type

Drive Ring

TypeMain Bearing

Housing

Configuration

Ba

ll

Ro

lle

r

Facing

Type

Sp

lit

So

lid

Su

pp

ort

Pla

te R

eq

’d



































SP314IL1 SP314P121 X X X X X X E


SP314OP1 SP314P123 X X not used X X X G


SP314IL1 SP314P125 X X X X X X E


SP314OP1 SP314P127 X X not used X X X G

23




Gre

as

e

Oil

Bro

nze

Ba

ll

Ca

st

Iro

n

No

du

lar

Main Bearing

Lubrication

Throwout

Collar Type

Pilot Bearing

Type

Drive Ring

TypeMain Bearing

Housing

Configuration

Ba

ll

Ro

lle

r

Facing

Type

Sp

lit

So

lid

Su

pp

ort

Pla

te R

eq

’d

SP314SB1 SP314S106 X X not used X X X H






SP314SB1 SP314S117 X X not used X X X I







RFD214IL TR435469 X X X X X J

RFD214IL TR435469A X X X X X J

RFD214IL TR435469B X X X X J

RFD314IL TR435470 X X X X X E

RFD314IL TR435470A X X X X X E

RFD314IL TR435470B X X X X E

24



Identifying the SAE Housing Size

A

B

D

C

Table 1. SAE Housing Identification

0 647.70 25.500 711.2 28.00 679.45 26.750 16 14.30 0.563

1 511.18 20.125 552.4 21.75 530.22 20.875 12 12.29 0.484

2 447.68 17.625 489.0 19.25 466.72 18.375 12 10.99 0.433

SAE

Housing

Size

A

Housing

Pilot Diameter

B

Housing

Flange O.D.

C

Bolt Circle

Diameter

D

Bolt Holes

Qty.Dia.

mm. inches mm. inches mm. inches mm. inches

25



Specifications

Maximum Safe Operating Speeds for Twin Disc Power Take-offs

(Refer to BOM and Twin Disc Power Take-Off Reference Listing on previouspages.)

Table 2. Maximum Safe Operating Speeds

PTO Model Solid

Drive Plate(s)

Split

Drive Plate

Solid

Drive Plate(s)

Split

Drive Plate

SP114 Series Grease 2400 1950 3000 2750

SPE114 Series Grease 2400 1950 3000 2750

SP214 Series Grease 2500 1950 3000 2750


SP214 Series Oil 2400 ----- 2400 2400

SP314 Series Grease 2500 1920 3000 2700

SP314 Series Oil 2500 1920 3000 2700


SP314SB Series Grease ----- ----- 3000 -----

RFD214 Series Grease 2200 2200 2200 2200

RFD314 Series Grease 2200 2200 2200 2200

Grease- or Oil-

lubricated Main

Bearing(s)

Cast Iron Drive Ring Steel or Nodular Drive Ring

Pilot bearing position (If used)


Ball-TypeThe owner/operator is responsible for checking the flywheel to ensure that thepilot bearing is installed on the shaft with sufficient clearance without bottomingin the flywheel bore. The depth of the pilot bore from the flywheel housing faceto shoulder on the flywheel pilot flange is 100.07 mm. (3.94 in.).

Roller-Type

Table 3. Roller-Type Pilot Bearing Dimensions

M2467 72 mm. (2.835 in.) 30.1 mm. (1.185 in.) 0.5 mm. (0.020 in.)

M2529 80 mm. (3.15 in.) 34.86 mm. (1.3725 in.) 0.5 mm. (0.020 in.)

M2713 100 mm. (3.94 in.) 39.62 mm. (1.5600 in.) 0.5 mm. (0.020 in.)

Roller

Bearing

Bearing O.D.Bearing Nominal

Width (C)

Bearing Nominal

Width +/- tolerance

26



Tapered Roller Bearing End Play

Table 4. Recommended Bearing End Playfor Tapered Roller Bearings Used in Side-Loaded applications

SP114P Series 0.15 - 0.25 0.006 - 0.010

SP214P Series 0.15 - 0.25 0.006 - 0.010

SPE214P Series 0.15 - 0.25 0.006 - 0.010

SP214OP Series 0.15 - 0.25 0.006 - 0.010

SP314P Series 0.15 - 0.25 0.006 - 0.010

SPE314P Series 0.15 - 0.25 0.006 - 0.010

SP314OP Series 0.15 - 0.25 0.006 - 0.010

SP314IL Series n/a (Ball Bearing) n/a (Ball Bearing)

RFD214IL Series n/a (Ball Bearing) n/a (Ball Bearing)


Model Number mm.

Recommended End Play

inches

Table 5. Recommended Bearing End Playfor Tapered Roller Bearings Used in In-Line applications

SP114P Series 0.23 - 0.30 0.009 - 0.012

SP214P Series 0.23 - 0.30 0.009 - 0.012

SPE214P Series 0.23 - 0.30 0.009 - 0.012

SP214OP Series 0.23 - 0.30 0.009 - 0.012

SP314P Series 0.23 - 0.30 0.009 - 0.012

SPE314P Series 0.23 - 0.30 0.009 - 0.012

SP314OP Series 0.23 - 0.30 0.009 - 0.012

SP314IL Series n/a (Ball Bearing) n/a (Ball Bearing)



Model Number mm.

Recommended End Play

inches

27



Filling the Main Bearing Cavity during initial assembly.


Grease Lubrication:Hand-pack the bearings before assembly. Hand-packing requires that the rollerelements and bearing races be coated with grease. After assembly, add greasethrough the grease fitting until grease escapes from the outboard labyrinth sealall around the shaft. Do Not Overfill. Always rotate the shaft while adding greaseto the bearing cavity.

Oil Lubrication SP214OP Series (such as SP214P125):Fill with oil through the breather hole at the top of the bearing carrier until the oillevel reaches the bottom of the oil level plug hole in the side of the bearingcarrier.

Oil Lubrication SP314OP Series (such as SP314P123 & SP214P127):Oil is supplied through a hose connected to the (orifice) fitting at the top of thebearing carrier. Oil is supplied whenever the engine is running. Oil drains fromthe bearing carrier through a hose connected at the bottom of the bearing carrier.

Filling the Main Bearing Cavity during periodic maintenance.

Refer to the information contained in the Maintenance section of this manual.

Engagement force on the operating shaft

Table 6. Torque at operating shaft to engage clutch

SP114 Series 295 - 391 218 - 289

SPE114 Series 295 - 391 218 - 289

SP214 Series 295 - 391 218 - 289

SPE214 Series 295 - 391 218 - 289

SP314 Series 295 - 391 218 - 289

SPE314 Series 295 - 391 218 - 289

RFD214 Series 332 - 440 245 - 325

RFD314 Series 295 - 391 218 - 289

Model Peak Torque on Operating Shaft

Nm Lb.-Ft.

28



PTO Deflection

PTO deflection due to loads imposed by the application should not exceed0.254 mm (0.010 in.). Deflection should be measured at the support plate pilotwith the dial indicator base mounted on a rigid part of the engine. See theillustration in Installation Tips in the Installation section of this manual.

29



Twin Disc PTO Support Plate Specifications

Twin Disc, Inc. requires that a support plate be used with SP214 and SP314Series models used in side-load applications and recommends that a supportplate be used for certain in-line applications.

G

B(diameter)

(angle to

first hole)

D

(Holes)

E (Qty.)

F (dia.)

43.18 cm. (17.0 in.)

Shim to

within

0.12 cm.

(0.005 in.)

A(diameter)

C(radius)

Figure 2. Typical Support Plate Illustration

Table 7. Support Plate Dimensions

PTO

Model

A

Bore Dia.

+.127/.025mm

(+.005/+.001”)

B

Bolt

Circle (Dia.)

C

Radius

D

Degree

E

Hole

Quantity

F

Hole

Diameter

G

Recommended

Thickness

SP214P, SPE214P,

SP214IL, SP314P

SPE314P, SP314OP

SP314IL (SP314P108 &

SP314P111)

45° 6

12.70 mm.

(0.500 in.)

SP214OP

30° 6

12.70 mm.

(0.500 in.)

225.43 mm.

(8.875 in.)

190.50 mm.

(7.50 in.)

SP314IL(SP314P121 &

SP314P125)

30° 6

17/32 in.

12.70 mm.

(0.500 in.)

190.50 mm.

(7.50 in.)

17/32 in.

0.679 in.136.65 mm.

(5.38 in.)

234.95 mm.

(9.25 in.)

200.01 mm.

(7.875 in.)

SP314SB ** 819.05 mm.

(0.750 in.)

17/32 in.162.05 mm.

(6.38 in.)

285.75 mm.

(11.25 in.)

238.15 mm.

(9.376 in.)

127.0 mm.

(5.0 in.)

225.43 mm.

(8.875 in.)

139.70 mm.

(5.50 in.)

** Refer to assembly drawing. Angular offset of the through holes must be calculated with respect

to orientation of sheave housing. Holes are equally spaced.

SP314SB (SP314S117) ** 819.05 mm.

(0.750 in.)

0.679 in.167.64 mm.

(6.60 in.)

304.80 mm.

(12.00 in.)

266.73 mm.

(10.501 in.)

Note: One possible mounting method provides installation ease.Use angle iron to couple the support plate to the engineframe.

30



Wear Limits

Table 8. Wear Limits - Bearing Carrier Bore Dimensions(Refer to BOM for the Bearing Carrier/Housing Part Number used in your PTO)

A7502 160.020 6.300 152.451 6.002 5

8424 127.025 5.001 n/a n/a 3

8424F 127.025 5.001 n/a n/a 3

8431 127.025 5.001 n/a n/a 3

1015764 190.030 7.4815 n/a n/a 6

02018611 140.040 5.5134 n/a n/a 3

02036012 160.025 6.3002 n/a n/a 6

A5194 152.425 6.001 n/a n/a 1

A5194E 152.425 6.001 n/a n/a 1

A5195 152.425 6.001 n/a n/a 1

9827 152.425 6.001 n/a n/a 8

1015768 160.023 6.3000 n/a n/a 7

1016518 160.065 6.302 160.065 6.302 4

1016518A 160.065 6.302 160.065 6.302 4

1019124 160.025 6.3002 n/a n/a 7

02036020 150.025 5.9065 n/a n/a 7

02018597 180.040 7.0882 n/a n/a 2

Housing

Part Number

Sheave Housing

or

Bearing Carrier

Part Number

Bore Dim. A

(Maximum)

mm. inches

Illustration

Number

Bore Dim. B

(Maximum)

mm. inches

31



A

B

A

A

B

3 4

1

A A

2

A

5

6

A

7

A

A

8

Figure 3. Housing/Bearing Carrier Illustrations

32



Table 9. Wear Limits - Shaft Dimensions(Refer to BOM for the Clutch Shaft Part Number used in your PTO)

Shaft

Part

Number

Pilot Bearing

Journal (Min.)

mm. inches

Illus.

Number

Front & Rear

Seal Journals

(Min.)

mm. inches mm. inches mm. inches

Main Bearing

Journal Dim. A

(Min.)

Main Bearing

Journal Dim. B

(Min.)

* Front Bearing Journal ** Output Bearing Journal

A5166 34.9987 1.3779 95.3008 3.752 95.3008 3.752 92.075 3.625 9

A5190 34.9987 1.3779 73.8556 2.9077 n/a n/a n/a n/a 2

A5190AO 34.9987 1.3779 73.8556 2.9077 n/a n/a n/a n/a 2

A5190B 34.9987 1.3779 73.8556 2.9077 n/a n/a n/a n/a 2

A5190BZ 34.9987 1.3779 73.8556 2.9077 n/a n/a n/a n/a 2

A5190CQ 34.9987 1.3779 73.8556 2.9077 n/a n/a n/a n/a 2

A6515B 34.9987 1.3779 95.3008 3.752 n/a n/a n/a n/a 2

A6515N 34.9987 1.3779 95.3008 3.752 n/a n/a n/a n/a 2

A6515R 34.9987 1.3779 95.3008 3.752 n/a n/a n/a n/a 2

A6515T 34.9987 1.3779 95.3008 3.752 n/a n/a n/a n/a 2

A6515U 40.0000 1.5749 95.3008 3.752 n/a n/a n/a n/a 2

A6619B 44.9987 1.7716 95.3008 3.752 n/a n/a n/a n/a 2

A6619K 44.9987 1.7716 95.3008 3.752 n/a n/a n/a n/a 2

A6619Q 44.9987 1.7716 95.3008 3.752 n/a n/a n/a n/a 2

B5027A 34.9987 1.3779 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027AQ 29.9593 1.1795 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027AR 34.9986 1.3779 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027AS 34.9986 1.3779 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027AV 34.999 1.3779 95.301 3.752 95.301 3.752 n/a n/a 1

B5027AW 34.9987 1.3779 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027AX 34.9987 1.3779 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027AZ 44.9987 1.7716 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027B 34.9987 1.3779 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5027BA 34.9987 1.3778 95.3008 3.752 95.3008 3.752 n/a n/a 1

B5225 45.0037 1.7718 95.3008 3.752 n/a n/a n/a n/a 2

B5225B 45.0037 1.7718 95.3008 3.752 n/a n/a n/a n/a 2

B5225D 45.0037 1.7718 95.3008 3.752 n/a n/a n/a n/a 2

B6247 not used 95.2779 3.7511 95.2881 3.7515 90.018* 3.544* 8

1015786 not used 90.013 3.5438 n/a n/a 71.37** 2.810** 3

1016185 not used 90.013 3.5438 n/a n/a n/a n/a 4

1016521 not used 90.030 3.5445 90.030 3.5445 n/a n/a 5

1016522 not used 90.030 3.5445 90.030 3.5445 n/a n/a 5

1021911 44.9987 1.7716 99.9973 3.9369 n/a n/a n/a n/a 2

1021912 44.9987 1.7716 99.9973 3.9369 n/a n/a n/a n/a 2

1021913 34.9910 1.3776 79.9973 3.1495 n/a n/a n/a n/a 10

1022209 not used 90.021 3.5441 90.021 3.5441 88.88 3.499 6

02035496 34.9910 1.3776 79.9973 3.1495 n/a n/a n/a n/a 10

02035709 34.9910 1.3776 99.9973 3.9369 n/a n/a n/a n/a 7

02036022 not used 120.0125 4.7249 80.0125 3.1501 n/a n/a 5

33



1

2

3

5

4

Large Shoulder

Small Shoulder

Figure 4. Clutch Shaft Illustrations

34



6

7

8

9

10

Figure 4. Clutch Shaft Illustrations (continued)

35



Torque Values for Fasteners

Note: The tables below provide information for several differenttypes of fasteners: U.S. Standard Fine and Coarse ThreadCapscrews, Bolts, and Nuts; Metric Coarse ThreadCapscrews, Bolts, and Nuts; Tapered Pipe Plugs (withthread lubricant); Straight Threaded Tube Fittings, HoseFittings, and O-ring Plugs. Be sure to use the appropriatetable to obtain the correct torque value.

Note: All threads and bearing face to be lubricated with light oilfilm prior to assembly.

Table 10. U.S. Standard Fine and Coarse Thread Capscrews, Bolts, and Nuts

1/4 8 - 11 6 - 8 14 - 16 10 - 12

5/16 18 - 23 13 - 17 27 - 33 20 - 24

3/8 34 - 39 25 - 29 47 - 56 35 - 41

7/16 50 - 58 37 - 43 75 - 88 55 - 65

1/2 81 - 95 60 - 70 113 - 132 83 - 97

9/16 111 - 133 82 - 98 163 - 190 120 - 140

5/8 163 - 190 120 - 140 224 - 264 165 - 195

3/4 278 - 332 205 - 245 400 - 468 295 - 345

7/8 447 - 529 330 - 390 637 - 746 470 - 550

1 671 - 793 495 - 585 969 - 1132 715 - 835

1 1/8 834 - 997 615 - 735 1376 - 1607 1015 - 1185

1 1/4 1152 - 1356 850 - 1000 1864 - 2203 1375 - 1625

Thread

Diameter

SAE Grade 5 SAE Grade 8

lb.-ft.N-m lb.-ft.N-m

36



Table 11. Metric Coarse Thread Capscrews, Bolts, and Nuts

Thread

Size

Property Class 8.8 Property Class 12.9

lb.-ft.N-m lb.-ft.N-m lb.-ft.N-m

Property Class 10.9

M6 9 -10 6.5 - 7.5 12 - 14 9 - 10 14 - 16 10 - 12

M8 21 -25 16 - 18 31 - 35 23 - 26 34 - 40 25 - 29

M10 43 - 49 32 - 36 60 - 68 44 - 51 70 - 80 51 - 59

M12 74 - 86 55 - 63 104 - 120 77 - 88 121 - 139 89 - 103

M16 179 - 205 132 - 151 256 - 294 189 - 217 298 - 342 219 - 253

M18 247 - 281 182 - 208 350 - 398 258 - 294 412 - 469 304 - 346

M20 348 - 400 257 - 295 493 - 567 364 - 418 581 - 669 429 - 493

M22 475 - 541 351 - 399 669 - 762 494 - 562 792 - 902 584 - 666

M24 603 - 693 445 - 511 848 - 976 626 - 720 1000 - 1150 737 - 848

M30 967 - 1113 714 - 820 1674 - 1926 1235 - 1421 2000 - 2301 1475 - 1697

Table 12. Tapered Pipe Plugs (with thread lubricant)

1/6-27 11.5 8.5 7.5 5.5

1/8-27 14 10.5 9 6.5

1/4-18 34 25 21.5 16

3/8-18 36.5 27 23 17

1/2-14 68 50 40.5 30

3/4-14 73 54 46 34

1-11 1/2 108 80 68 50

1 1/4-11 1/2 115 85 75 55

1 1/2-11 1/2 115 85 75 55

NPTF

Size (in.)

In Cast Iron or Steel In Aluminum

N-m (+ or - 5%) lb.-ft. (+ or - 5%)N-m (+ or - 5%)lb.-ft. (+ or - 5%)

37



Table 13. Straight Threaded Tube Fittings, Hose Fittings, and O-ring Plugs

Nominal

Thread

Diameter

lb.-ft. (+ or - 5%)

5/16 5 3.5

3/8 11.5 8.5

7/16 16 12

1/2 20 15

9/16 24.5 18

5/8 24.5 18

11/16 34 25

3/4 40.5 30

7/8 54 40

1 1/16 75 55

1 3/16 88 65

1 1/4 88 65

1 5/16 108 80

1 3/8 108 80

1 5/8 108 80

1 7/8 108 80

2 1/2 108 80

N-m (+ or - 5%)

Nominal

Thread

Diameter

lb.-ft. (+ or - 5%)N-m (+ or - 5%)

M10X1.0 12 9

M12X1.5 16 12

M14X1.5 20 15

M16X1.5 24 18

M18X1.5 34 25

M22X1.5 54 40

M27X2.0 75 55

(in iron)

M27X2.0 75 55

(in aluminum)

M33X2.0 88 65

M42X2.0 108 80

M48X2.0 108 80

38



NOTES

39

Twin Disc, Incorporated Installation


Installation

Installation Tips

Tapered Roller Bearing Adjustment

1. Tapered roller bearing end play adjustment is different in SP114,SPE114, SP214, SPE214, SP314 and SPE314 Series Power Take-Offs for side load applications than it is for in-line applications. Insurethat the adjustment is correct for the application.

2. All SP114, SPE114, SP214, SPE214, SP314 and SPE314 SeriesPower Take-Offs are manufactured at Twin Disc�s factory with thetapered roller bearing end play adjusted for side-load application.

3. RFD214IL and RFD314IL Series Power Take-Offs have ball-type mainbearings. No adjustment is required.

4. SP314SB Series Power Take-Offs have roller-type main bearings. Noadjustment is required.

5. Tapered roller bearing end play in SP114, SPE114, SP214, SPE214,SP314 and SPE314 Series Power Take-Offs used for in-line applicationsmust be adjusted to specifications shown in Tapered Roller BearingEnd Play in the Description and Specifications section of this manual.

a. For rebuilt or remanufactured PTOs: Adjust the end play toproper specifications for in-line applications at the time ofassembly. Follow instructions contained in the Assembly sectionof this manual.

40

Twin Disc, IncorporatedInstallation


b. For SP114, SPE114, SP214, SPE214, SP314 and SPE314Series PTOs manufactured in Twin Disc’s factory: Readjustthe factory end play setting prior to installation on the engine forin-line applications. Most SP114, SPE114, SP214, SPE214,SP314 and SPE314 Series Power Take-Offs have a tag attachedto the housing which contains instructions that must be followed.Readjust the end play setting as instructed.

Figure 5. Factory Instruction Tag for End Play Adjustment

Alignment

6. The flywheel and flywheel housing alignment must be within specifications.Perform the measurements shown in Prior To Installation in thisInstallation section.

7. Avoid excessive misalignment between the engine and PTO. Checkthe following if abnormal wear of parts exists:

a. Excessive loads tend to deflect parts to which PTOs are mounted.A dial indicator can be mounted on a rigid part of the engine orindependently on the foundation to determine deflection underactual operating conditions. See Support Plate, Belt or chaintension/Allowable Side Load Pulls and Deflection Causedby Side Load Pulls in this Installation section and informationcontained in the Description and Specifications sectionregarding these issues

b. Readings taken before the drive is installed with the enginestanding still and when under operating conditions (with the engineoff and all belts, chains, driveshafts and/or support plates attachedand secured with bolts torqued to specifications) will indicatethe extent of deflection. In no case should the deflection exceed0.254 mm. (0.010 in.) (T.I.R.) at the bearing carrier.

Note: The dial indicator should never be applied with the enginerunning. This is unsafe and could result in damage to thedial indicator.

41



8. In a u-joint-type installation, to realize the longest possible life of thepower take-off bearings, the best possible alignment must be maintainedbetween the center line of the power take-off shaft and the center line ofthe driven unit shaft. See information contained in Alignment-U-Joint-Type Installation in this Installation section.

9. In side-load installations, alignment between the driveR and driveNpulleys must be carefully established and maintained. See Positionand Measure Alignment of the Sheave in this Installation section.

Drive Ring

10. The drive ring must be properly installed. See information in Drive RingInstallation in this Installation section.

Pilot Bearings

11. Ball-type pilot bearings and Roller-type pilot bearings must be installedproperly. See Ball-Type Pilot Bearing Installation or Roller-Type PilotBearing Installation in this Installation section.

Support Plate

12. When mounting the engine and Power Take Off in the machine, acustomer-supplied support plate may be required to support the outputend of the pto housing. See the information about customer-suppliedsupport plates, the Twin Disc Power Take-Off Reference Listingand Twin Disc Support Plate Specifications contained in theDescription and Specifications section of this manual.

Failure to follow this requirement may result in damage to the powertake off or the engine flywheel housing.

Belt or chain tension/Allowable Side Load Pulls

13. Avoid excessive tightening of belts or chains. See the Allowable SideLoad tables in this Installation section.

14. Avoid excessively loose belts or chains. Belt tension or chain adjustmentthat is below specifications can cause belt/chain �whip� during operation,resulting in bearing failure and shortened power take-off service life.

42



Deflection Caused by Side Load Pulls

15. Power Take-Off deflection due to loads imposed by the applicationshould not exceed specified limits shown in PTO Deflection in theDescription and Specifications section. Deflection should be measuredat the support plate location on the power take-off (or main bearing areaof the housing if no support plate is used).

Figure 6. Determining Deflection While Applying Side Loads

The dial indicator should not be applied while the unit is operating. Thiscould result in damage to the dial indicator.

Lubrication

16. Verify that the PTO is properly lubricated prior to starting the engine.

a. The throwout collar is lubricated by grease through a grease fittingon the outside of the main housing.

b. SP214OP and SP314OP Series main bearings are lubricatedby oil contained in the main bearing cavity.

43



c. All other SP114, SPE114, SP214, SPE214, SP314, SPE314,SP314SB, RFD214 and RFD314 Series main bearings arelubricated by grease through a grease fitting in the housing orbearing carrier.

d. The sealed-for-life pilot bearing should not be lubricated duringservice.

e. Pilot bearings designed for periodic lubrication must be greased.See Lubrication in the Maintenance section for moreinformation. Improper lubrication will result in premature failureof components. DO NOT OVERGREASE!

Refer to the Twin Disc Power Take-Off Reference Listing and Filling theMain Bearing Cavity in the Description and Specifications section,Lubrication in the Maintenance section and Engineering Drawings nearthe back of this manual.

Clutch Adjustment

17. Verify that the clutch is adjusted according to the procedure outlined inClutch Adjustment in the Maintenance section. Failure to do so willresult in premature clutch wear and failure.

Note: Twin Disc will not be responsible for any damage or injuryresulting from improper adjustment and/or lubrication. Thisincludes any accessory drives and loads.

Hand Lever Position

18. Proper hand lever position is required to obtain long service life of thethrowout bearing. See Hand Lever Position for Twin Disc PowerTake-Offs and Model SPE114, SPE214 and SPE314 ArmAdjustment Procedure in this Installation section.

Air Engagement Mechanisms

19. Air engagement mechanisms must be installed and adjusted properlyfor proper clutch actuation and long service life of the PTO. No preloadon the throwout bearing can exist either in the fully-engaged or fully-released positions, and the air mechanism must be engineered andinstalled to provide proper engagement force and stroke to properlyengage and disengage the clutch. See Setting Up Air Engagementon Twin Disc Power Take-Offs in this Installation section.

44



Prior to Installation (Ref: SAE J1033 and J617)

Refer to Identifying the SAE Housing Size in the Descriptionand Specifications section of this manual.

Most Twin Disc products mount directly onto the flywheel of the engine.Flywheel-to-driven component interference is possible due to mismatchof components or other reasons. Therefore, engine crankshaft endplayas well as flywheel alignment check must be made before the drivencomponent, the Power Take-Off, is installed.

After installation of the Power Take-Off, crankshaft end play should bemeasured again. End play at the second measurement should be thesame as the first. A difference in these two end play measurements couldbe an indication of interference. Consequently, the Power Take-Offshould be removed and the source of interference found and corrected.

Twin Disc will not be responsible for system damage caused by engineto Twin Disc match-up regardless of the cause of interference. Thisengine crankshaft end play check is considered mandatory.

Note: All measurements must be taken with the engine or motormounted on its supports after the flywheel and housinghave been thoroughly cleaned.

1. Measure and record the engine crankshaft or motor shaft endplay usinga dial indicator. Record this value, as it will be used later._______

45



2. Bolt the indicator to the flywheel so the indicator is perpendicular to theflywheel housing face and the indicator stem rides on the flywheel housingface.

Figure 7. Checking Flywheel Housing Face

3. Rotate the shaft through on entire revolution and note the runout. Thetotal indicator reading (T.I.R.) must not exceed:

SAE #0 Housing 0.41 mm. (0.016 in.)SAE #1 Housing 0.30 mm. (0.012 in.)SAE #2 Housing 0.28 mm. (0.011 in.)

Note: The flywheel and crankshaft of the engine must be heldagainst either the front or rear of the crankshaft thrustbearing while the total indicator sweep (T.I.R.) is beingmade.

46



4. Readjust the indicator so the stem rides on the pilot bore of the flywheelhousing face.

Figure 8. Checking Flywheel Housing Bore

5. Rotate the shaft through one entire revolution and note the runout. Thetotal indicator reading (T.I.R.) should not exceed:

SAE #0 Housing 0.41 mm. (0.016 in.)SAE #1 Housing 0.30 mm. (0.012 in.)SAE #2 Housing 0.28 mm. (0.011 in.)

6. Remove the indicator base from the flywheel and bolt it to the flywheelhousing face. Position the indicator stem so that it rides where the drivering will set on the flywheel face.

Figure 9. Checking Driving Ring Surface of Flywheel

7. Rotate the shaft through one entire revolution and note the face runout ofthe flywheel. The total indicator reading (T.I.R.) must not exceed 0.01mm.(0.0005 in.) per 25.4 mm. (per inch) of flywheel diameter.

Note: The flywheel and crankshaft of the engine must be heldagainst either the front or rear of the crankshaft thrustbearing while the total indicator sweep (T.I.R.) is beingmade.

47



8. Readjust the indicator stem so it rides on the driving ring pilot bore ofthe flywheel.

Figure 10 . Checking Driving Ring Pilot Bore of Flywheel

9. Rotate the shaft through one entire revolution and note the driving ringbore eccentricity. The total indicator reading (T.I.R.) must not exceed0.13 mm. (0.005 in.).

10. Adjust the indicator stem so that it rides on the pilot bearing bore cavity.

Figure 11. Checking Pilot Bearing Bore of Flywheel

11. Rotate the shaft through one entire revolution and note the pilot bearingbore eccentricity. The total indicator reading (T.I.R.) must not exceed0.13 mm. (0.005 in.).

Note: Eccentricity between the driving ring pilot bore and thepilot bearing bore must not exceed 0.20 mm. (0.008 in.).

48



Drive Ring Installation

Refer to information regarding cleaning and inspection of the drive ring in theCleaning and Inspection section of this manual before proceeding.

1. Clean the drive ring and flywheel of any dirt or debris as necessary.

2. Use crocus cloth or emery cloth to remove any surface imperfectionssuch as nicks, burrs, and sharp edges on the O.D. or the surface thatwill be mounted against the flywheel face.

3. Use crocus cloth or emery cloth to remove any surface imperfectionssuch as nicks, burrs, and sharp edges in the I.D. of the flywheel pilotbore or on the face that will be in contact with the drive ring.

4. Position the drive ring against the flywheel, piloted in the mounting bore,and secure with eight hex-head capscrews. Torque the capscrew to theproper specifications given in Torque Values for Fasteners in theDescription and Specifications section of this manual.

Drive ring attachment screws must be grade 8 per SAE J429. Do notuse substitutes.

49



Ball-Type Pilot Bearing Installation

Refer to the Twin Disc Power Take-Off Reference Listing in the Descriptionand Specifications section, the exploded views in the Illustration section andEngineering Drawings near the back of this manual.

Refer to information regarding cleaning and inspection in the Cleaning andInspection section of this manual before proceeding.

1. Support the output end of the clutch shaft.

2. Make sure the clutch shaft end stub is free of surface imperfectionssuch as nicks, burrs, and sharp edges. Remove them using fine emerycloth or crocus cloth.

3. Tap the pilot bearing onto the clutch shaft. The front face of the pilotbearing should be positioned flush with the input end of the clutch shaft.Tap or apply force to only the inner race of the bearing.

Note: Tap or press only on the inner race of the bearing. Anyimpact on the outer race or balls will damage the bearing,resulting in shortened service life or premature failure.

Do not damage the seal of the pilot bearing. A damaged seal rendersthe pilot bearing destroyed and it must be replace with a new bearing.

Front of Pilot

Bearing Flush with

End of Clutch

Shaft

Clutch Shaft

Pilot Bearing

(Ball-type shown)

Figure 12. Position of the Ball-Type Pilot Bearing on the Shaft

50



Roller-Type Pilot Bearing Installation

Some Twin Disc Power Take-offs are designed with roller-type pilot bearings.All of the roller-type bearings available from Twin Disc are the separate racetype, i.e. the inner race is removable from the outer race and seal assembly.Due to its design configuration, axial alignment of the inner and outer racesis extremely important. The information and instructions below will assure properbearing mounting.

Instructions for assembly.



1. Position the pto on the bed of a press with the pilot bearing end up andthe output end of the clutch shaft resting firmly on a solid support.

Note: The PTO must be standing on the output end of the shaft.

The power take-off must be securely supported as it stands on the endof the shaft so it does not tip or fall over.

Output end of the

shaft MUST rest and

be in contact with a

solid support (Press

bed).

Use several 4” x 4”

blocks or other

means of insuring

the PTO does not tip

or fall over.

123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234

123123123123123123123123123123123123123123123123123123123123123123123123

123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234

123123123123123123123123123123123123123123123123123123123123123123123123

Figure 13. Support the pto standing on the end of the shaft

51



2. Press the pilot bearing inner race on the clutch shaft so it is flush with theinput end of the shaft.

3. Carefully measure dimension (a). Record the measurement.

4. Refer to the Roller-Type Bearing Dimensions table in the Descriptionand Specifications section of this manual. Subtract the appropriate rollerbearing nominal width (c) from measurement (a). This will determinethe position of the pilot bearing outer race in the flywheel bore (dimensionb).

a - c = b (pilot bearing outer race position)

5. Install the pilot bearing outer race in the flywheel and position it atdimension (b) as shown.

Pilot Bearing

Inner Race

Inner race

flush with

end of shaft

a

b

Flywheel

Housing

Face

Flywheel

Pilot Bearing

outer race

Figure 14. Install Pilot Bearing-Roller Type

52



PTO Installation to Engine or Driving Member



1. Clean the PTO housing flange, flywheel housing flange, and pilot bearingbore of any debris.

2. Make sure the housing flange and flywheel housing flange are free ofsurface imperfections such as nicks, burrs, and sharp edges. Removethem using fine emery cloth or crocus cloth.

3. Install a minimum of three guide studs in the flywheel housing, locatedapproximately 120o apart. Using a suitable hoist, position the PTO onthe guide studs and slide it against the flywheel housing, carefully aligningthe pilot bearing with the pilot bearing bore in the flywheel and the teethof the friction plates (6) with the drive ring (5).

Do not force the PTO unit onto the engine. If any resistance is noted,repeat the clutch plate centering procedure either in the clutch assemblyor final assembly information of the Assembly section to align and centerthe friction plates so they mesh properly with the teeth of the drive ring.

4. Secure the PTO housing to the flywheel housing with (12 or 16) hex-head capscrews. Torque the capscrew to the proper specifications givenin Torque Values for Fasteners in the Description and Specificationssection of this manual.

Note: PTO housing to flywheel housing attachment screws mustbe grade 5 or better.

5. Rap the output end of the main shaft with a soft hammer to remove anypreload on the main bearings and/or pilot bearing.

This step must not be omitted. Bearing failure may result.

53



6. Measure the crankshaft endplay again. The measurement must be thesame value as recorded from step 1 under Prior To Installaton. Locateand correct the source of preload if the endplay is not the same value.

Engine and/or PTO failure will result from any excessive preload oncomponents.

All except SP314SB models: (SP314SB skip to step 12)

7. Install the key (34) on the output end of the clutch shaft (33) and installthe drive sheave, chain sprocket, or u-joint flange as the applicationrequires.

8. Align the sheaves as described in Position and Measure Alignmentof the Sheave in this section.

Refer to the Twin Disc Power Take-Off Reference Listing in theDescription and Specifications section and Engineering Drawingstowards the back of this manual.

9. Install the support plate if it is to be used. Refer to support plateinformation in Twin Disc PTO Support Plate Specifications in theDescription and Specifications section. Install eight M12 x 1.75 pitch8.8 Property Class quality capscrews per ISO 898-1. Torque to 80 Nm.(59 lb.-ft.).

Note: Verify proper shimming and alignment of the support plate.

10. Install and tighten the belts to the manufacturer�s specifications, beingsure that belt tension does not cause excessive deflection. (Refer toinformation in the Description and Specifications section andAllowable Side Load Pulls in this section to measure and assure thatexcessive deflection does not occur when the belts are tightened.)

11. Install the hand lever assembly (53) as shown in the Hand LeverPosition for Twin Disc Power Take-Offs and, if appropriate, theModel SPE114, SPE214 and SPE314 Arm Adjustment Procedurein this Installation section, and torque the hex head capscrew to 81 - 95Nm (60 - 70 lb. ft.)

54



SP314SB models:

12. Remove three (only) of the capscrews (48) that attach the sheave housing(60) to the clutch housing (44). Remove three that are about 120 degreesapart. Install three threaded guide pins in the holes to support the sheavehousing as it is being removed.

13. Remove the remaining capscrews (48) and remove the sheave housing.

14. Install the sheave. Use a hydraulic power unit to properly position thesheave.

Be sure to install the power unit so the force is directed through theshaft and not across any of the bearings. The bearings may be damaged,resulting in premature failure.

15. Align the sheaves as described in Position and Measure Alignmentof the Sheave in this section.

The driveR sheave must be aligned with the driveN pulley. Align to within1/2 of one degree using a straight edge or “tight-cord” method.

The sheave housing must seat properly on the two dowel pins in theclutch housing.

16. Remove the three guide dowels and replace with the remaining threehex head capscrews. Torque the capscrews to the proper specificationsgiven in Torque Values for Fasteners in the Description andSpecifications section of this manual.

55



17. Mount the dial indicator base on a secure location on the PTO housing.Position the tip of the dial indicator on the sheave as shown. Set the dialindicator to zero.

Mount Dial Indicator

Base Securely

Measure at

Three Locations

Figure 15. Measure Sheave Alignment

18. Rotate the sheave through one complete revolution and recheck accuracywith at least one other revolution. Read the total amount of dial indicationsweep. Total runout must not exceed 0.254 mm. (0.010 in.) T.I.R. Markthe �high� spot as indicated when the dial indicator reaches its maximumprogression point in the clockwise direction.

19. Repeat at the other two locations as shown, marking the �high� spot ofeach. Total runout must not exceed 0.254 mm. (0.010 in.) T.I.R.

Note: All three readings will normally be the same. If one issignificantly different from the other two, first recheck toassure an accurate reading was obtained. If the readingsexceed the allowable limit, alignment of the sheave mustbe corrected to prevent failure.

Install the belts.

20. Remove the sheave housing as described above.

21. Install the belts loosely in position in the grooves.

56



22. Reinstall the sheave housing as described above.

23. Tighten the belts to the manufacturer�s specifications, being sure thatbelt tension does not cause excessive deflection. (Refer to informationin the Description and Specifications section and Allowable SideLoad Pulls in this section to measure and assure that excessivedeflection does not occur when the belts are tightened.)

24. Install the hand lever assembly (53) as shown in the Hand LeverPosition for Twin Disc Power Take-Offs and, if appropriate, theModel SPE114, SPE214 and SPE314 Arm Adjustment Procedurein this Installation section, and torque the hex head capscrew to 81 - 95Nm (60 - 70 lb. ft.)

25. Install the support plate. Refer to support plate information in theDescription and Specifications section. Install eight M12 x 1.75 pitch8.8 Property Class quality capscrews per ISO 898-1. Torque to 80 Nm.(59 lb.-ft.).

Note: Verify proper shimming and alignment of the support plate.

57



Hand Lever Position for Twin Disc Power Take-Offs

Normal Position: Operating Shaft Horizontal

To insure there is no preload on the shifting mechanism, the hand lever positionwith the clutch engaged should be slightly past vertical position, slightly towardsengine.

The handle should NEVER be installed in a horizontal position whenthe operating shaft is positioned horizontally. Improper handle positioncan cause throwout collar failure resulting in catastrophic failure of theclutch.

Vertical

DisengagedEngaged

Figure 16. Hand Lever Position

Special Position: Operating Shaft Vertical

If the installation requires that the operating shaft be in a vertical position, astop collar must be installed to prevent the weight of the hand lever, operatingshaft and throwout yoke from creating a preload on the throwout collar. Positionthe hand lever as described above and also position and lock a stop collar onthe operating shaft so that the throwout yoke is centered on the throwout collar.Contact Twin Disc�s Service Department for information on use of a stop collar.

Stop CollarOperating Shaft

Figure 17. Use of a stop collar with a vertical operating

58



Model SPE114, SPE214 and SPE314 Series Arm AdjustmentProcedure

Clearance “X”

SPE114 - 2.286 mm. (0.090 in.)

SPE214 - 2.286 mm. (0.090 in.)

SPE314 - 2.286 mm. (0.090 in.)

Clearance

SPE114 - 3.048 mm. (0.120 in.)

SPE214 - 3.048 mm. (0.120 in.)

SPE314 - 3.048 mm. (0.120 in.)

Figure 18. SPE114, SPE214 and SPE314 Series Adjust Camrols

Refer to the Engineering Drawings, and the illustrations above and in theIllustration section of this manual.

1. Loosen the neutral lock arm hex head capscrew that secures it to theoperating shaft.

2. Engage the clutch.

3. Position the camrols (92) at the clearance �X� of 2.286 mm. (0.090 in.)by using feeler stock or gauges.

4. Place the detent roller (84) in the forward groove of the detent locator(88).

5. Position the neutral lock arm (80) on the operating shaft to provide aclearance of 3.148 mm. (0.120 in.) between the snap ring (79) on theroller pin (82) and the neutral lock arm.

6. Tighten the neutral lock arm hex head capscrew and torque to 40.7 Nm(30 lb.-ft.).

59



Position and Measure Alignment of the Sheave

1. Align the driveR and driveN shafts so that the faces of the sheaves arealigned and parallel to each other. Misalignment must be LESS THAN1/2 of 1 degree between the faces.

2. Position the sheave (driveR sheave on the PTO shaft) so it is alignedwith the driveN sheave (on equipment being driven by the PTO).

3. Calculate MAXIMUM allowable misalignment distance of the faces:Max. = 0.222 mm. (0.00875 in.) x distance between sheave centerlines.

4. Place a tight cord or straight edge against both edges of the flat face ofone sheave. Measure the distance between the cord or straight edgeand the face of the other sheave. The gap is the misalignment distance.Align the sheaves to meet specifications.

Misalignment between the sheaves will result in shortened service lifeof the belts and may result in premature equipment failure.

Misalignment

Distance

Measure

misalignment

distance

between

sheave face and

cord or straight

edge here.

Straight edge

or tight cord to

be flat against

both edges of

both sheaves

Use

Alignment

straight edge

or tight cord

Use

Alignment

straight edge

or tight cord

Aligned Not Aligned

Straight edge

or tight cord

flat against

both edges of

one sheave

DriveR Sheave

DriveN Sheave

DriveR Sheave

DriveN Sheave

DriveR and

DriveN shafts

must be parallel.

Figure 19. Align Sheaves to Specifications

60



Allowable Side Loads

x

CENTERLINE

OF SIDE

LOAD

REAR OF BEARING

HOUSING

L=126,000 x H.P.

N x Dx F x LF

Figure 20. Allowable Side Pull and Formula to Determine Applied Load(See alternate illustrations for Spread Bearing Models)

Formula values:

� L = actual applied load (Lbs.)

� N = shaft speed (RPM)

� D = pitch diameter (in.) at sheave, etc.

� F = load factor− 1.0 for chain or gear drive − 2.5 for all V belts− 1.5 for timing belts − 3.5 for flat belts

� LF = 2.1 for reciprocating compressors and other severe shock driversand 1.8 for large inertia type drive (crushers, chippers, planers)

A support plate must be attached at the rear of the PTO if it is subjectedto side load operation of the shaft. See the Twin Disc Power Take-OffReference Listing and Support Plate Specifications in the Description andSpecifications section of this manual.

Note: SP214IL and SP314IL Power Take-offs arerecommended for in-line, not side-loaded, applications.

61



Table 14. Allowable Side Loads

(Table 14.1) SP114P (M1969A, M1985, M1985A): (SP114P001,

SP114P003, SP114P101, SP114P102, SP114P104, SP114P106,


SP114P114, SP114P115)

1 2 3 4 5 6 7 8

1000 3390 2600 2120 1780 1535 1350 1210 1090

1500 3390 2600 2120 1780 1535 1350 1210 1090

2000 3390 2600 2120 1780 1535 1350 1210 1090

2200 3390 2600 2120 1780 1535 1350 1210 1090

RPM

‘X’ Distance

Table 14.1

0

500

1000

1500

2000

2500

3000

3500

4000

0 2 4 6 8 10

"X" Distance, inches (see drawing)

Maxim

um

Lo

ad

, L

bs.

1000 RPM

1500 RPM

2000 RPM

2200 RPM

62



Table 14. Allowable Side Loads (continued)

1 2 3 4 5 6 7 8

1000 4030 3240 2710 2330 2050 1820 1640 1500

1500 4030 3240 2710 2330 2050 1820 1640 1500

2000 4030 3240 2710 2330 2050 1820 1640 1500

2200 4030 3240 2710 2330 2050 1820 1640 1500

RPM

‘X’ Distance

(Table 14.2) SP214P (M1969A) (SP214P111)

Table 14.2

0

500

1000

1500

2000

2500

3000

3500

4000

4500

0 2 4 6 8 10

"X" Distance, Inches (See Sketch)

Maxim

um

Lo

ad

, L

bs

1000 RPM

1500 RPM

2000 RPM

2200 RPM

63




1 2 3 4 5 6 7 8

1000 5360 4320 3610 3100 2720 2420 2180 1990

1500 5360 4320 3610 3100 2720 2420 2180 1990

2000 5360 4320 3610 3100 2720 2420 2180 1990

2200 5360 4320 3610 3100 2720 2420 2180 1990

RPM

‘X’ Distance

(Table 14.3) SP214P (M1985, M1985A): (SP214P001, SP214P004,



SP214P138, SP214P139, SP214P142)

Table 14.3

0

1000

2000

3000

4000

5000

6000

0 2 4 6 8 10


Ma

xim

um

Lo

ad

, L

bs

1000 RPM

1500 RPM

2000 RPM

2200 RPM

64




RPM

‘X’ Distance

(Table 14.4) SP214P (M2327, M2529) (SP214P110, SP214P113,

SP214P122, SP214P129, SP214P141)

1 2 3 4 5 6 7 8

1000 5980 4700 3880 3290 2870 2540 2270 2060

1500 5980 4700 3880 3290 2870 2540 2270 2060

2000 5980 4700 3880 3290 2870 2540 2270 2060

2200 5980 4700 3880 3290 2870 2540 2270 2060

Table 14.4

0

1000

2000

3000

4000

5000

6000

7000

0 2 4 6 8 10


Ma

xim

um

Lo

ad

, L

bs

1000 RPM

1500 RPM

2000 RPM

2200 RPM

65




1 2 3 4 5 6 7 8

1000 7750 6730 5480 4630 4000 3530 3160 2850

1200 7330 6730 5480 4630 4000 3530 3160 2850

1800 6480 6130 5480 4630 4000 3530 3160 2850

2400 5950 5650 5350 4630 4000 3530 3160 2850

RPM

‘X’ Distance

(Table 14.5) SP214OP (M2529) (SP214P125)

Table 14.5

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

0 2 4 6 8 10


Maxim

um

Lo

ad

, L

bs

1000 RPM

1200 RPM

1800 RPM

2400 RPM

66




RPM

‘X’ Distance

(Table 14.6) SPE214P (M2529) (SPE214P003 )

1 2 3 4 5 6 7 8

1000 5980 4700 3880 3290 2870 2540 2270 2060

1500 5980 4700 3880 3290 2870 2540 2270 2060

2000 5980 4700 3880 3290 2870 2540 2270 2060

2200 5980 4700 3880 3290 2870 2540 2270 2060

Table 14.6

0

1000

2000

3000

4000

5000

6000

7000

0 2 4 6 8 10"X" Distance, Inches (See Sketch)

Maxcim

um

Lo

ad

, L

bs

1000 RPM

1500 RPM

2000 RPM

2200 RPM

67




(Table 14.7) SP314P (MA1122) (SP314P118)

RPM

‘X’ Distance

1 2 3 4 5 6 7 8

1000 6170 5850 5580 4720 4110 3630 3260 2945

1500 5350 5120 4850 4650 4110 3630 3260 2945

2000 5025 4750 4450 4250 4110 3630 3260 2945

2200 4850 4650 4350 4150 4000 3630 3260 2945

Table 14.7

0

1000

2000

3000

4000

5000

6000

7000

0 2 4 6 8 10


Ma

xim

um

Lo

ad

, In

ch

es

1000 RPM

1500 RPM

2000 RPM

2200 RPM

68




(Table 14.8) SP314P (M1985, M1985A) (X9585, SP314P119,

SP314P002, SP314P101, SP314P110, SP314P116, SP314P126)

RPM

‘X’ Distance

1 2 3 4 5 6 7 8

1000 6170 5120 4200 3570 3100 2740 2460 2220

1500 5350 5120 4200 3570 3100 2740 2460 2220

2000 5025 4750 4200 3570 3100 2740 2460 2220

2200 4850 4650 4200 3570 3100 2740 2460 2220

Table 14.8

0

1000

2000

3000

4000

5000

6000

7000

0 2 4 6 8 10


Maxim

um

Lo

ad

, L

bs

1000 RPM

1500 RPM

2000 RPM

2200 RPM

69




(Table 14.9) SP314P; SPE314P (M2137, M2327): (SP314P003,

SP314P004, SPE314P006, SP314P007, SP314P008,


SP314P122 )

RPM

‘X’ Distance

1 2 3 4 5 6 7 8

1000 6170 5850 5580 4720 4110 3630 3260 2945

1500 5350 5120 4850 4650 4110 3630 3260 2945

2000 5025 4750 4450 4250 4110 3630 3260 2945

2200 4850 4650 4350 4150 4000 3630 3260 2945

Table 14.9

0

1000

2000

3000

4000

5000

6000

7000

0 2 4 6 8 10


Ma

xim

um

Lo

ad

, L

bs

1000 RPM

1500 RPM

2000 RPM

2200 RPM

70




(Table 14.10) SP314P (M2529, M2713): (SP314P004, SP314P008,

SP314P105, SP314P107, SP314P112)

RPM

‘X’ Distance

1 2 3 4 5 6 7 8

1000 6170 5850 5580 4720 4110 3630 3260 2945

1500 5350 5120 4850 4650 4110 3630 3260 2945

2000 5025 4750 4450 4250 4110 3630 3260 2945

2200 4850 4650 4350 4150 4100 3630 3260 2945

Table 14.10

0

1000

2000

3000

4000

5000

6000

7000

0 2 4 6 8 10


Ma

xim

um

Lo

ad

, In

ch

es

1000 RPM

1500 RPM

2000 RPM

2200 RPM

71




(Table 14.11) SP314OP (M2529) (SP314P123, SP314P127)

RPM

‘X’ Distance

1 2 3 4 5 6 7 8

1000

1500

2000

2200

Table 14.11

0

0

0

1

1

1

1

0 2 4 6 8 10


Ma

xim

um

Lo

ad

, L

bs

1000 RPM

1500 RPM

2000 RPM

2200 RPM

Consult Twin Disc

72




RPM

‘X’ Distance**

5 6 7 8 9 10

1500 10600 11900 13600 14700 12800 11350

1800 10000 11250 12800 13900 12150 10750

2100 9550 10750 12250 13300 11600 10300

2400 9160 10300 11800 12800 11150 9900

** See Illustration Below for proper

measurement of “X” Distance

(Table 14.12) SP314SB (No Pilot Bearing) (SP314S106,

SP314S107, SP314S108, SP314S114, SP314S115,

SP314S116, SP314S118, SP314S119, SP314S120,

SP314S122, SP314S123, SP314S124)

Rear Face of Housing (44)

X

Centerline of

Side Load

Table 14.12

8000

9000

10000

11000

12000

13000

14000

15000

16000

4 5 6 7 8 9 10 11

"X" Distance, Inches (See Sketch Below)

1500 RPM

1800 RPM

2100 RPM

2400 RPM

73




RPM

‘X’ Distance**

5 6 7 8

1600 9612 10821 12378 11065

1800 9278 10445 11948 10681

2000 8989 10119 11576 10349

2200 8736 9835 11250 10057

** See Illustration Below for proper

measurement of “X” Distance

(Table 14.13) SP314SB (No Pilot Bearing) (SP314S117)

Rear Face of Housing (44)

X

Centerline of

Side Load

Table 14.13

8000

8500

9000

9500

10000

10500

11000

11500

12000

12500

13000

3 4 5 6 7 8

"X" Distance, Inches (See Sketch Below)

Maxim

um

Lo

ad

, L

bs

1600 RPM

1800 RPM

2000 RPM

2200 RPM

74



Alignment - U-Joint-Type Installation

Refer to illustration on next page.

To realize the longest possible life of the power take-off bearings, the bestpossible alignment must be maintained between the center line of the powertake-off shaft and the center line of the driven unit shaft.

1. It is extremely important that the forks of the drive shaft between the ptoand the driven unit lie in the same plane. This will prevent severevibrations from occurring in the drive shaft.

2. The center lines of the pto shaft and the driven unit input shaft must beoffset within the limits recommended by the u-joint manufacturer toprolong the life of the universal joint needle bearings.

3. It is extremely important that the center lines of the pto shaft and drivenunit input shaft be parallel. This will further prevent vibrations which causepremature pto bearing failure.

4. Proper lubrication of the pto is important for satisfactory service. Referto lubrication specifications in the Description and Specificationssection of this manual.

Align the centerlines of the pto shaft and the input shaft of the drivenunit. (One possible method is described below.)

5. To align the engine and gear head by this method, two accurate straightedges at least 91 cm. (36 in.) long and a tape measure are required.

6. Place the straight edges horizontally along the face of the pto and gearhead hubs. Measure distances A and B. These two distances should beequal within 3.17 mm. (0.125 in.) at a point 45.7 cm. (18 in.) from thecenterline of the shaft. Move the engine and/or driven unit to obtain thisspecification.

7. Rotate the shafts so the straight edges are in a vertical position. Measurethe distances C and D as was done for A and B in step 2. These twodistances should be equal within 3.17 mm. (0.125 in.) at a point 45.7cm. (18 in.) from the centerline of the shaft. Move the engine and/ordriven unit to obtain this specification.

75



8. Secure the engine and driven unit. Recheck A and B, C and D asdescribed in steps 5 through 7 above. All measurements must be withinthe specifications. If not, repeat steps 5 through 7 until specificationsare met.

Figure 21. Alignment - U-Joint-Type Installation

76



Setting Up Air Engagement on Twin Disc Power Take Offs

1. The cylinder should be located so that the piston moves forward andbackward in exactly the same direction as the engagement lever and isaligned so it travels in exactly the same plane.

2. The air cylinder must be of sufficient size to operate the required torqueto engage the clutch. It must have some means to make adjustment onthe piston stroke.

3. Air pressure must be constant. Low pressures could give only partialengagement which will cause failures of the clutch and throwout collar.

4. The piston travel must be within limits established to both fully engageand fully disengage the clutch. Failure to provide these parameters willcause failure and possible breakage of the clutch.

5. The engaging cylinder must not place a pressure either in the engagedor disengaged direction after completion of its cycle. The throwout collarmust float free after engagement or disengagement. Operating the ptowith constant pressure on the throwout collar will result in failure.

Suggestion:A slotted connector, similar to the one illustratedbelow may be used.

Fully

Engaged

Position

Fully

Disengaged

Position Cylinder

Rod

Connector with

slotted hole

Slotted hole

Pin

Adjust

cylinder

stroke so

there is a

clearance on

both sides of

the pin when

in

engaged AND

disengaged

positions

Figure 22. Slotted Connector Used on Air Cylinder Rod

77



6. The air cylinder must be readjusted when the clutch is readjusted andany time the travel or position moves from the specifications describedabove.

Determine the length of travel for the engaging cylinder.

7. Multiply the length of the hand lever by the value shown in the followingchart. This provides the approximate required length of the piston stroke.

Note: The hand lever length is the distance from the center ofthe operating shaft to the point where the cylinder will beconnected to the lever.

Table 15. Engaging Stroke Travel at 25.4 mm. (1 in.)

SP114, SPE114 Series 7.925 0.312

SP214, SPE214 Series 7.925 0.312

SP314, SPE314 Series 7.950 0.313

ModelEngaging Stroke Travel at 25.4 mm. (1 in.)

mm. inches

Determine the engaging force in pounds required at the cylinder.

8. Divide the force value in the chart below by the length of the hand lever(in inches). This provides the required force (in pounds) that must beprovided by the piston.

Note: Periodically disconnect the power cylinder to measure theclutch engagement force. Refer to Clutch Adjustmentin the Maintenance section.

Table 16. Engaging Force Required at Cylinder at 25.4 mm. (1 in.)

SP114, SPE114 Series 14012 3150

SP214, SPE214 Series 14012 3150

SP314, SPE314 Series 14012 3150

ModelEngaging Force Required in Cylinder

Force (newtons) Force (pounds)

78



NOTES

79

Twin Disc, Incorporated Operation


Operation

General Information

Model SP114, SPE114, SP214, SPE214, SP314, SPE314, SP314SB,RFD214 and RFD314 Series Power Take-Offs consist of a manually engagedand disengaged disconnect clutch mounted on an output shaft in a cast ironhousing that is bolted to the engine. Clutch engagement and disengagementis accomplished by means of an operating lever on the outside of the ptohousing, which actuates an internal linkage mechanism.

A drive ring is bolted to the engine flywheel. Internal teeth of the drive ringmesh with external teeth of the clutch driving plate(s). These are the inputcomponents of the Power Take-Off. Input components always rotate at enginerpm.

Output components of the Power Take-Off consist of a clutch hub that ismounted on the output shaft, a linkage mechanism for clutch engagementand disengagement and clutch adjustment components. Clutches designedwith multiple clutch driving plates have a clutch center plate located betweenthe driving plates. The clutch center plate and pressure plate are driventhrough internal teeth that mesh with external teeth on the clutch hub. Untilclutch engagement is initiated, the output components do not rotate.

During clutch engagement, the clutch pressure plate is moved to clamp theclutch friction plate(s) against the friction face of the clutch hub (or the centerplate(s). The internal engagement mechanism of the clutch locks the clutchpressure plate in the engaged position to complete the drive. Thus, at fullclutch engagement while the engine is running, the output shaft is driven atengine speed.

Grease- or oil-lubricated main bearings are located in the pto housing orbearing carrier. Some designs include a pilot bearing mounted in the engineflywheel to support the front end of the clutch shaft. However, some designsincorporate a main bearing configuration that does not require use of a pilotbearing.

A support plate bolted to the bearing carrier of some units is required toprovide sufficient support where heavy weight and/or side loads exist.

80

Twin Disc, IncorporatedOperation


Clutch Engagement Procedure

Normal Clutch Engagement

The PTO clutch should normally be engaged with the engine at the lowestrpm possible. The clutch should be engaged quickly to avoid an extendedperiod of slippage during engagement. The clutch should be engaged withthe engine operating below 1,000 rpm.

After the clutch is fully engaged and the load has been brought up to engineengagement speed, the engine rpm may be increased to operating speed.

Clutch Engagement Where High Inertia Loads Exist

Twin Disc, Inc. recommends that the PTO installation be designed to allowclutch engagement at 1,000 rpm or below. Under extreme circumstances,where high inertia loads must be picked up, the engine may have to beoperated at higher speeds while the engagement occurs, as engaging theclutch at 1,000 rpm or below may result in stalling the engine.

Clutch engagement should occur at the lowest possible engine rpm.

Heavy inertia loads may be brought up to engine speed by a series of shortclutch engagements and disengagements at intervals long enough togradually increase the speed of the load, yet prevent excessive heat build-up in the friction facings.

After the clutch is fully engaged and the load has been brought up to engineengagement speed, the engine rpm may be increased to operating speed.

Under no circumstances should the clutch be slipped for more than asecond or two without either fully engaging or disengaging the clutchto permit it to cool.

81

Twin Disc, Incorporated Operation


Clutch engagement to clear a jammed driven device

Never engage the PTO to unjam a stuck load. Doing so could result ininjury to the operator, and damage to the equipment.

Always shut the engine off and disengage the clutch before clearing a jammedload. The jam should be cleared, and the output shaft must be rotated to becertain that the jam is completely removed before starting the engine andengaging the PTO.

Operator should be aware of the required clutch engagement force

The clutch engagement force must be at the proper level to realize long lifeof the PTO clutch. If this engagement force seems low, refer to the ClutchAdjustment Procedure in the Maintenance section of this manual.

Insufficient clutch engagement force can cause clutch slippage resultingin catastrophic clutch failure.

The engagement lever must be located in the proper position to preventpremature failures of the internal throwout collar components. Theengagement lever should be in the vertical position with the clutch engaged.See Hand Lever Position for Twin Disc Power Take-Offs in the Installationsection of this manual.

Improper handle position can cause throwout collar failure resulting incatastrophic failure of the clutch.

82

Twin Disc, IncorporatedOperation


NOTES

83

Twin Disc, Incorporated Maintenance


Maintenance

Maintenance Tips

Tapered Roller Bearing Adjustment

1. Tapered roller bearing end play adjustment should have been adjustedprior to installation of the power take-off. Periodically check for excessiveshaft movement during clutch engagement and disengagement andduring operation to insure failure is not occurring. See information in theInstallation section of this manual.

Pilot Bearings

2. Ball-type pilot bearings and Roller-type pilot bearings must be installedproperly. Some pilot bearings are to be greased periodically, SeeLubrication this Maintenance section.

Lubrication

3. Verify that the PTO is properly lubricated prior to starting the engine andat all times during operation. Refer to the Twin Disc Power Take-OffReference Listing in the Description and Specifications section,Lubrication in this Maintenance section and Engineering Drawingsnear the back of this manual.

Throwout bearing failures may be, among other causes, the result ofimproper lubrication.

Clutch Adjustment

4. Check frequently to insure that the clutch is adjusted according to theprocedure outlined in Clutch Adjustment in this Maintenance section.Failure to do so will result in premature clutch wear and failure.

Note: Twin Disc will not be responsible for any damage or injuryresulting from improper adjustment and/or lubrication. Thisincludes any accessory drives and loads.

84

Twin Disc, IncorporatedMaintenance


Hand Lever Position

5. Throwout bearing failures may be, among other causes, the result ofimproper hand lever position. See Hand Lever Adjustment for TwinDisc Power Take-Offs and Model SPE114, SPE214 and SPE314Arm Adjustment Procedure in the Installation section of this manual.

Alignment

6. The flywheel and flywheel housing alignment should have been set withinspecifications prior to installation of the power take-off and must bemaintained for long service life of the components.

Misalignment of driven components can result in power take-off failure.Periodically check for bolts that may have loosened or drivencomponents that have not been properly aligned during servicing ormaintenance procedures. See information regarding Alignment in theInstallation section of this manual.

Support Plate

7. When mounting the engine and Power Take-Off in the machine, acustomer-supplied support plate may be required to support the outputend of the PTO housing. Proper installation and alignment of the supportplate must be maintained.

Periodically check to insure that the bolts securing the support plate aretightened to specifications and that the support plate is properlyreinstalled and realigned whenever work is performed on the powertake-off or power package module. See the information about customer-supplied support plates and Twin Disc Support Plate Specificationscontained in the Description and Specifications section of this manual.

Failure to follow maintain this requirement may result in damage to thepower take off or the engine flywheel housing.

85



Belt or chain tension/Allowable Side Load Pulls

8. Maintain proper belt or chain tension adjustments. Avoid excessivelytight or excessively loose belts or chains. Failure to maintain proper beltor chain adjustment can cause bearing failure and shortened powertake-off service life.

Deflection Caused by Side Load Pulls

9. Maintain proper side that do not exceed specified limits shown inAllowable Side Load Pulls in this Maintenance section and PTODeflection in the Description and Specifications section.

Air Engagement Mechanisms

10. Air engagement mechanisms remain properly adjusted at all times. SeeSetting Up Air Engagement on Twin Disc Power Take-Offs in theInstallation section.

86



Lubrication


Grease Specifications

Use NLGI Grade 2 grease with a minimum 149° C. (300° F.) drop point for alllubrication.

Oil Specifications for oil-lubricated main bearings - SP211OP and SP311OPSeries

Use a good grade MS, DG, or better SAE No. 30 engine oil.

Lubrication Locations

Config. D

Collar

(grease)

Main

Bearings

(grease)

Operating

Shaft

(grease)

Config. C, E, F and J

Collar

(grease)

Main

Bearings

(grease)

Operating

Shaft

(grease)

Collar

(grease)

Main Bearings-

two fittings.

(grease)

Operating

Shaft

(grease)

Config. BConfig. A

Config. G

Collar

(grease)

Main Bearings

(oil in from

external source)

Operating

Shaft

(grease)Main Bearings

(oil out to sump)

Config. H & I

Collar (grease)

Operating

Shaft (grease)

Front Main

Bearing (grease)

Output

Bearing

(grease)

Collar

(grease)

Fill Main

Bearings (oil)

Operating Shaft

(grease)

Oil Level

Check

Collar (grease)

Operating

Shaft (grease)

Front Main

Bearing

(grease)

Pilot Bearing

(grease)

Periodic lube

only

Config. J

Figure 23. Lubrication Locations

87




Table 18.Quick-reference lubrication chart. Also see information above.

Throwout Collars 1cc Every 8-10 hrs. NLGI Grade 2 Grease

Main Bearings (Grease) Add 1cc Every 8-10 hrs. NLGI Grade 2 Grease

Main Bearings (Oil) Fill to bottom Every 8-10 hrs. MS, DG or better

(SP214OP only) of check Drain & fill SAE No. 30 Engine Oil

plug hole. 6 months/1000 hrs.

Operating Shaft 1cc 3 months/100 hrs. NLGI Grade 2 Grease

Pilot bearings 1cc 3 months/100 hrs. NLGI Grade 2 Grease

(Periodic lube)

Pilot bearings none required

(Pre-lubricated)

Clutch Linkage drop 500 hrs. .

Item AmountCheck

IntervalNotes

Main Bearings

All Models SP114, SPE114, SP214, SPE214, SP314, SPE314,SP314SB, RFD214 and RFD314 Series (except SP214OP, andSP314OP Series)

Apply 1 cc of grease (one shot from a grease gun) before start-up and thenevery 8-10 hours operation thereafter, through the fitting on the bearing carrier(55) or sheave housing.

Models SP214OP Series (such as SP214P125)The tapered roller bearings are lubricated from oil contained in an oil cavity inthe bearing carrier. Fill through the breather hole until the oil level is at thebottom of the check plug hole in the side of the bearing carrier. The oil levelshould be checked and maintained every 8-10 hours operation. Drain and refillthe oil cavity every 6 months or 1000 hours (whichever occurs first).

Models SP314OP Series (such as SP314P123 & SP314P127)The tapered roller bearings are lubricated from engine oil continuously suppliedthrough an orifice fitting in the bearing carrier. The oil drains back to sumpthrough an opening in the bottom of the bearing carrier. No periodic check isnecessary.

88



Operating Shaft Fittings

All Models SP114, SPE114, SP214, SPE214, SP314, SPE314,SP314SB, RFD214 and RFD314 SeriesApply 1 cc. of grease (one shot from a grease gun) before starting and thenevery 3 months or 100 hours operation (whichever occurs first).

Throwout Collar

All Models SP114, SP214, SP314SB, RFD214 and RFD314 SeriesApply 1 cc. of grease (one shot from a grease gun) daily before start-up andthen every 8-10 hours operation thereafter, through the fitting on the taperedpart of the housing.

Models SPE114, SPE214 and SPE314 SeriesNo throwout collar is used. No lubrication is necessary.

Pilot Bearing

All Models SP114, SPE114, SP214, SPE214, SP314, SPE314, RFD214and RFD314 Series (except sealed-for-life style bearings).If the pilot bearing supplied with your power take-off is to be periodicallylubricated, add one shot of grease from a grease gun every 100 hours throughthe fitting in the output end of the clutch shaft. Do Not Overgrease!!

All Models SP114, SPE114, SP214, SPE214, SP314, SPE314, RFD214and RFD314 Series with sealed-for-life style bearingsThe pilot bearing supplied with most power take-offs is pre-lubricated andsealed for life. No maintenance is required. Inspection is recommended everytwo years or when the power take-off is removed from the driving componentfor servicing.

Clutch Linkage

All ModelsLubricate the clutch linkage mechanism, cotter pins, clevis pins and levers,with engine oil every 500 hours of operation.

Lubricate sufficiently but sparingly. Excess oil can splash or drip ontothe friction plates, causing clutch slippage that may result in clutchfailure.

89



Clutch Adjustment

Note: New power take-offs must have clutch adjustment checkedbefore being placed into service and after the first 10hours of operation. This includes any power take-offs withnew friction plates. New plates have a wear in period andthe clutch may require several adjustments before the newplates are worn in.

After wear in, clutch adjustment should be checked regularly. Heavy dutyapplications (rock crushers, etc.,) which have frequent engagements, numerousengagements in an operating day or relatively long periods of slip require morefrequent readjustment than light duty applications.

Adjust the clutch BEFORE it overheats, does not pull, or the operating leverjumps from the engaged position. But these symptoms are indications thatclutch adjustment is required.

Adjustment measurements are made by fitting a torque wrench with a 1 1/2�socket over the hex end located at the bottom of the hand lever. Grasp only thetorque wrench when making measurements.

1. Disconnect any power engagement devices from the operating shaft ifso equipped.

To adjust the clutch:

Refer to the exploded views in the Illustration section.

2. Remove the instruction cover plate (45) from the housing (44) and turnthe clutch shaft until the adjusting ring lock pin (25) can be reached.

3. Disengage the adjusting lock pin and insert a cotter pin or small nail intothe hole provided to hold it in the disengaged position. Turn the adjustingyoke (26) to the right (or clockwise when looking at the flywheel) until therequired peak torque is required at the operating shaft (55) to engagethe clutch. Refer to the Description and Specifications section of thismanual for correct peak torque.

4. Remove the cotter pin or small nail. Re-engage the adjusting ring lockpin.

5. Repeat steps 3 and 4 above as necessary until the proper torque readingis obtained. Replace the instruction cover plate and secure with twohex-head capscrews (46). Securely tighten.

90



Friction Plate Replacement

Refer to the exploded views in the Illustrations section.

Common symptoms indicating that the friction plates (6) are worn out are:

1. The adjusting yoke (26) cannot be turned clockwise any further.

2. The friction face surfaces have worn flush with the rivet heads, or therivets are loose.

It is necessary to remove and disassemble the clutch assembly to replace thefriction plates. Refer to instructions in the Disassembly and Assembly sectionsof this manual.

91



Field Adjustment - Tapered Roller Bearing End Play (side-loadedpto applications) (Except SB Models)

Refer to the exploded views in the Illustrations section.

All Models SP114, SPE114, SP214, SPE214, SP314 andSPE314Series (except SP314IL, SP314SB, RFD214 and RFD314Series):The only approved method for field adjustment of tapered roller bearings (39,40, 41, 42) in Twin Disc Power Take-Off units is by the use of a dial indicator toread actual bearing end play.

SP314IL, SP314SB, RFD214 and RFD314 Series:There is no adjustment of ball-type or cylindrical roller-type bearings.

Adjustment:Refer to the procedure in (Final Setting) Measure and Set Bearing End Play asdescribed for your bearing housing configuration in the Assembly section ofthis manual.

Refer to the illustration below and the Tapered Roller Bearing End Play settingfor Tapered Roller Bearings used in Side-Load applications in theDescription and Specifications section.

Use a Hoist

and swivel

hook.

Dial indicator

Figure 24. Dial indicator and power take-off position for measuring andsetting bearing end play. (Except SB Models)

92



Field Adjustment - Tapered Roller Bearing End Play - (In-Line ptoapplications)

All Models SP114, SPE114, SP214, SPE214, SP314 and SPE314Series (except SP314IL, SP314SB, RFD214IL and RFD314ILSeries):

Note: SP314IL, RFD214IL and RFD314IL Series: There isno adjustment of ball-type bearings.

Note: SP314SB Series: Not designed for in-line applications.

1. Field experience for tapered roller bearings (39, 40, 41, 42) used within-line drive installations indicates that extra care must be taken whenadjusting the power take-off tapered roller bearings.

2. The end play for these applications is special for the above types ofapplications.

3. Set bearing end play for these special applications using the methoddescribed for side-loaded applications on the previous pages, but setto the specifications shown in Tapered Roller Bearing End Play settingfor Tapered Roller Bearings used in In-Line applications in theDescription and Specifications section.

93



Field Adjustment - Checking Bearing End Play - Model SP314SBSeries Only

Refer to the Twin Disc Power Take-Off Reference Listing in the Descriptionand Specifications section, the exploded views in the Installation section andEngineering Drawings near the back of this manual.

Models SP314SB Series Only:There is no adjustment of SP314SB series bearings, but bearing end playshould be verified to insure the bearings are not damaged or preloaded afterwork is done on the unit. Bearing end play must be 0.20 mm - 0.89 mm (0.008- 0.035 inches) after assembly.

The only approved method for measuring bearing play in Twin Disc PowerTake-Off units is by the use of a dial indicator to read actual bearing end play.

1. Securely support the unit with the clutch shaft in a vertical position andthe output end up. Be sure the shaft is clear to rotate.

Use a Hoist

and swivel

hook.

Dial indicator

Figure 25. Dial indicator and power take-off position for measuringbearing end play. (SB Models)

94



2. Attach an eyebolt in the thread at the output end of the shaft. Attach ahoist with a thrust bearing-equipped swivel hook to the eyebolt.

3. Securely attach a dial indicator to the housing and locate the stem sothe tip is contacting the end of the shaft and movement of the tip isexactly vertical, the same direction as the movement of the shaft.

4. Lift the unit off the supports using the hoist. Apply approximately 90.7Kg. (200 lbs.) of downward force on the bearing carrier while dialindicator is being set. Mark a spot on the end of the shaft next to thestem as a starting reference point and set the dial indicator to �zero.�

5. Carefully and gently lower the unit back onto the supports. Allow thehoist to go slack. Apply approximately 90.7 Kg. (200 lbs.) of downwardforce on the shaft while dial indicator reading is being taken. (The weightof the shaft will be considered part of the 90.7 Kg. (200 lbs.) Read thedial indicator to read actual bearing end play.

6. Repeat steps 4 and 5 to be sure the dial indicator reading repeats withaccuracy. Bearing end play should be as shown above.

95

Twin Disc, Incorporated Disassembly


Disassembly

The following procedure is for complete disassembly of the unit. Prior to thisprocedure, the power take-off should be removed from the engine. Qualifiedpersonnel should do the work in a fully equipped facility.

Note: Illustrations used here are to aid in understanding andcompleting the procedure, and may not appear to beconsistent with the previous disassembly steps.

Note: Ten main bearing configurations are illustrated. Refer tothe Twin Disc Power Take-Off Reference Listing inthe Description and Specifications section to determinewhich configuration is used in your pto.

96

Twin Disc, IncorporatedDisassembly


Power Take-off Removal From The Engine


1. Loosen and remove the belts and remove all attached parts from theoutput end of the power take-off.

2. Remove the hex nut and hex-head capscrew securing the hand lever tothe operating shaft.

3. If used, loosen the support plate from the base mounting.

Configurations H & I only: (All other configurations skip to step 8.)

4. Remove hex head capscrews (65) and washers (66) (config. I only)and remove the seal plate (64) from the sheave housing (60).

5. Remove the external snapring (73) (config. H only).

6. Remove the hex head capscrews (48) and remove the sheave housing.Bearing (41) will also be removed with the sheave housing.

7. Remove the belts.

All Configurations:

8. Attach lifting equipment to the power take-off and take out the slack justenough to begin to support the weight of the pto. Do not apply too muchforce.

Lifting devices and their capacity must be capable of supporting theweight of the power take-off and all attached devices and equipment.Suspend the pto with the lifting devices securely attached at 3 positions(minimum) so it remains with the main drive shaft in a horizontal positionuntil it is safely lowered and resting on a secure bed.

97



9. Remove the (twelve or sixteen) hex-head capscrews securing the powertake-off to the engine flywheel housing. Use two (7/16-14 UNC x 1 1/2�or 1/2�-13 UNC x 1 1/2� or ) bolts as pusher screws in the two tappedholes provided in the housing flange. Use the pusher screws to separatethe pto from the engine flywheel housing. Remove the power take-offfrom the engine.

10. Remove the eight hex-head capscrews securing the drive ring to theengine flywheel.

11. Support the power take-off on a bench with the output shaft up. Usewooden blocks under the power take-off. Remove the sheave from theclutch shaft (33).

12. Remove the shaft key.

98



Clutch Removal


1. Support the power take-off on a bench with the clutch end facing up.Use wooden blocks under the power take-off.

2. If the pilot bearing (or pilot bearing inner race) remained on the shaft,remove it using a standard bearing puller.

3. If the pilot bearing is a two-piece bearing, remove the bearing�s outerrace from the flywheel using a standard bearing puller.

Note: The pilot bearing will be destroyed upon removal. If thebearing seal is broken the bearing is considereddestroyed.

4. Remove the two hex- head capscrews and remove the instruction plateif they were not previously removed.

5. Use a 15/16� wrench to remove the jam nut and lock washer from thehose fitting located on the side of the power take-off housing. Push thefitting and hose into the power take-off housing.

6. Straighten the bent portion of the hub nut lock washer. Use a 4� wrenchor socket to remove the hub nut from the clutch shaft. Remove the hubnut lock washer.

7. Use a gear puller with threaded legs for 1/2�-13 UNC tapped holes topull the clutch assembly from the clutch shaft. Install the puller so thethreaded legs screw into the holes provided in the hub-and-back plateand the jackscrew exerts force on the end of the clutch shaft.

The thread puller holes are not to be used as jackscrews.

Remove the clutch and puller from the clutch shaft. Remove the hub keyif it was not removed with the clutch.

Note: Certain pto models, such as SP214P003, may usespecial components as part of the clutch operationmechanism. Remove those components that are mountedon the inside of the pto housing.

99



Clutch Disassembly


All 14 inch model clutches

1. Set the clutch assembly on a bench with the throwout collar facing up.Disengage the clutch.

2. Remove the grease fitting (23) from the hose fitting (20). Remove thehose (19) and hose fitting (18) from the trunnion of the collar assembly.

3. Remove the four cotter pins (17) from the four clevis pins (16) securingthe sliding sleeve to the links (15).

4. Remove the sleeve and collar assembly from the links.

Note: Models SPE114, SPE214 and SPE314, such asSP211P003, do not use a release collar assembly.

Bronze Collar Disassembly

5. Remove two hex huts and two hex head bolts to remove the throwoutcollar halves and shims from the sliding sleeve.

Ball Bearing Collar Disassembly

6. Remove the internal snap ring (31) from the sleeve side of the collar(28) and let it hang on the sliding sleeve.

7. Tap the collar from the release bearing (30).

8. Remove the external snap ring (29) from the sliding sleeve.

9. Press the sleeve from the bearing in a press or pull the bearing from thesleeve.

10. Remove the snap ring (29) from the sleeve.

100



All 14 inch model clutches

11. Pull the adjusting lock pin (25), compressing the lock pin spring (24),and unscrew the adjusting ring (26) from the hub-and-back plateassembly. Remove the adjusting lock pin and spring from the adjustingring.

12. Straighten and remove the four cotter pins (13) and the four clevis pins(14) to disconnect the eight links (15) from the four levers (9).

13. Straighten and remove the four cotter pins (12), four washers (10) andfour clevis pins (11) that secure the levers to the pressure plate (8).Remove four levers from the pressure plate.

14. Remove the pressure plate (8) and friction plate (6) from the hub-and-back plate (4).

Two- and three- plate 14 inch model clutches only

15. Remove the remaining friction plate(s) (6) and center plate(s) (7) fromthe hub-and-back plate.

101



Remove the Operating Shaft and Throwout Yoke

Refer to the BOM and exploded views in the Illustrations section of this manual.Refer to the Twin Disc Power Take-Off Reference Listing in the Descriptionand Specifications section to determine which configuration is used in yourPTO.

SPE114, SPE214 and SPE314 Series only: (SP114, SP214, SP314,SP314SB, RFD214 and RFD314 Series skip to step 5)

Snap Ring

(79)

Neutral

Lock Arm

(80)

Spring

(81)

Roller Pin

(82)

Hex Head

Capscrew

(86)

Retaining

Ring

(83)

Hex Head

Capscrew

(87)

Detent

Locator

(88)

Washer

(85)

Clevis Pin

(89)

Throwout

Fork

(54)Set Screw

(91)

Roller

(90)

Operating

Shaft

(55)

Key

(56)

Hex Nut

(93)Camrol

(92)

Figure 26. Illustration - SPE Release Mechanism Components

1. Remove the two hex nuts (93) from the Camrols (92) and remove theCamrols from the throwout yoke (54).

2. Remove the external snap ring (79) from the roller pin (81) and removethe roller pin, roller (84) and spring (81) from the neutral lock arm (80).

3. Remove the retaining ring (83) from the headed pin (89) and removethe headed pin and roller (84) from the roller pin (82).

102



4. Remove two hex head capscrews (85) from the locator detent (88) andremove the detent from the clutch housing (44).

All SP114, SPE114, SP211, SPE214, SP314, SPE314, SP314SB,RFD214 and RFD314 Series

5. Loosen the set screw (77) that secures the stop collar (76) (if used) onthe operating shaft (55) and remove the stop collar.

6. Remove the hex-head capscrew from the throwout yoke (54). Tap oneend of the operating shaft gently to expose one of the woodruff keys(56). Remove the key. Do the same for the other side of the shaft toremove the other key. Remove the operating shaft from the clutch housing(44) and throwout yoke.

7. Remove the two grease fittings (57) from the outside of the housingnear the operating shaft holes only if replacement of the parts isnecessary.

Proceed to Clutch Shaft and Housing Disassembly:Ten main bearing configurations are illustrated. Refer to the Twin Disc PowerTake-Off Reference Listing in the Description and Specifications section todetermine which configuration is used in your PTO.

Skip to:Clutch Shaft and Housing Disassembly - Configuration AClutch Shaft and Housing Disassembly - Configuration BClutch Shaft and Housing Disassembly - Configuration CClutch Shaft and Housing Disassembly - Configuration DClutch Shaft and Housing Disassembly - Configuration EClutch Shaft and Housing Disassembly - Configuration FClutch Shaft and Housing Disassembly - Configuration GClutch Shaft and Housing Disassembly - Configuration HClutch Shaft and Housing Disassembly - Configuration IClutch Shaft and Housing Disassembly - Configuration J

103



Clutch Shaft and Housing Disassembly - Configuration A

Refer to the BOM and exploded views in the Illustrations section of this manualand the main bearing housing configuration below.

Hex Head

Capscrew

(35)

Washer

(36)

Retainer

Clip

(37)

Bearing

Retainer

(38)

Bearing

Cup

(39)

Bearing

Cone

(41)

Plug

(43)

Bearing

Cone

(40)

Bearing

Cup

(42)

Fitting

(57)

Housing

(44)

Figure 27. Illustration - Configuration A

1. Support the pto on the bench with the input end up. Remove the hexhead capscrew (35), lock washer (36) and the retainer clip (37) so thebearing retainer (38) may be rotated.

2. Rotate the bearing retainer counter-clockwise to remove it.

3. Lift the clutch shaft (33) with the two bearing cones (40 & 41) from thehousing. The forward bearing cup (39) will come out with the shaft andbearing cones.

4. Use an arbor press to remove the bearing cones from the clutch shaft.The bearing cones remove in opposite directions from the shaftshoulder.

104



5. Remove the rear bearing cup (42) from the housing by removing the twoplugs (if used) from the access holes in the housing and tapping therace from the bore through the holes using a blunt punch.

6. Remove the grease fitting (51) from the housing.

105



Clutch Shaft and Housing Disassembly - Configuration B


Hex Head

Capscrew

(65)

Retainer

Clip

(63)

Housing

(44)

Retainer

(64)

Bearing

Cup

(39)

Bearing

Cone

(41)

Bearing

Cone

(40)

Bearing

Cup

(42)

Bearing

(43)

Retainer

(38)

Hex Head

Capscrew

(35)

Fitting

(51)

Fitting

(50)

Fittings

(57)

Figure 28. Illustration - Configuration B

1. Support the pto on the bench with the output end up. There should be aclearance below the input end of the clutch shaft. Remove the hex headcapscrews (65) and the retainer clip (63) so the bearing retainer (64)may be rotated.

2. Rotate the bearing retainer counter-clockwise to remove it.

3. Lift the clutch shaft (33) with the two bearing cones (40 & 41) and therear bearing cup (42) from the housing. The inner race of the front bearing(43) will be removed with the shaft and bearing cones.

4. Use a split-type bearing puller or arbor press to remove the inner raceof the front bearing (43) from the clutch shaft.

5. Use an arbor press to remove the bearing cones from the clutch shaft.The bearing cones remove in opposite directions from the shaftshoulder.

6. Turn the housing over on the bench and securely support it with the inputend up. Remove the hex head capscrews (35) and bearing retainer(38).

106



7. The outer race of the front bearing (43) should easily slide out of thehousing bore. If not, tap out from inside the housing.

8. Remove the forward bearing cup (39) from the housing by tapping therace from the bore from the inside of the housing toward the output end.

9. Remove the grease fittings (50 & 51) from the housing.

107



Clutch Shaft and Housing Disassembly - Configuration C & D

Refer to the BOM and exploded views in the Illustrations section of this manualand the main bearing housing configurations below.

Bearing

Cup

(39)

Bearing

Retainer

(38)

Bearing

Carrier

(47)

Hex Head Capscrew (48)

& Washer (49)

Retainer

Clip

(37)

Hex Head

Capscrew

(35)

Washer

(36)

Bearing

Cone

(41)

Plug

(52)

Fitting

(57)

Bearing

Cup

(42)

Bearing

Cone

(40)

Housing

(44)

Figure 29. Illustration - Configuration C

Bearing

Cup

(39)

Bearing

Retainer

(38)

Bearing

Carrier

(47)

Hex Head

Capscrew

(48)

Retainer

Clip

(37)

Hex Head

Capscrew

(35)

Washer

(36)

Bearing

Cone

(41)

Breather

(72)

Fitting

(57)

Bearing

Cup

(42)

Bearing

Cone

(40)

Housing

(44)

Pipe Plug

(71)

Wear

Sleeve

(67)

Oil Seal

(68)

O-Ring

(78)

Wear

Sleeve

(69)

Oil Seal

(70)

Plug

(52)Oil Level Check Plugs (94) (not shown) in

sides of bearing housing

Figure 30. Illustration - Configuration D

108



1. Turn the power take-off housing with attached parts over on the bench.Support the housing so the output end of the clutch shaft faces up and isfree to rotate. There should be a clearance below the input end of theclutch shaft.

2. Remove hex head capscrews (48) and remove the support plate if used.

3. Lift the clutch shaft (33) and bearing carrier (47) unit from the clutchhousing (44).

4. Secure the bearing carrier with attached parts in a large vise withprotective jaws, with the input end of the shaft facing up, gripping therear cast section of the bearing carrier in the vise.

5. Remove the hex head capscrew (35), washer (36) and retainer clip (37).

6. Remove the bearing retainer (38) be rotating it counterclockwise.

Configuration D only (Configuration C skip to step 9)

7. Remove the o-ring seal (78) from the O.D. of the bearing retainer.

8. Tap the oil seal (68) out of the bearing retainer.

Configurations C & D

9. Lift the clutch shaft with bearing cup (39) and bearing cones (40 & 41)from the bearing carrier.

Note: Configuration D only: Two wear sleeves (67 & 69) willcome out with the shaft and bearing cones.

10. Use an arbor press or bearing puller to remove the bearing cones fromthe clutch shaft only if replacement is necessary. The bearing conesremove in opposite directions from the shoulder machined on the clutchshaft.


11. To remove the two wear sleeves, use a split-type bearing puller.

Note: Remove the wear sleeves only if they must be replaced.

109




12. Remove the rear bearing cup from the bearing carrier by removing thetwo plugs (52) from the bearing carrier and tapping the bearing cup (42)from the bearing carrier through the holes using a blunt punch. Removethe race only if replacement is necessary.

Configuration D only: (Configuration C skip to step 15)

13. Knock the oil seal (70) out of the bearing carrier (47).

14. Remove the breather (72) and the two oil fill check plugs (94) from thesides of the bearing carrier.

Configuration C only:

15. Remove the grease fittings (51) from the bearing carrier.

110



Clutch Shaft and Housing Disassembly - Configuration E


Fitting

(51)

Hex Head

Capscrew

(48)

Internal

Snap Ring

(75)

Fitting

(57)

Bearing

(40)

Housing

(44)

External

Snap RIng

(58)

Washer

(49)

External

Snap RIng

(59)

Bearing

Carrier

(47)

Figure 31. Illustration - Configuration E


2. Remove hex head capscrews (48) and washers (49) and remove thesupport plate if used.

3. Lift the clutch shaft (33) and bearing carrier (47) unit from the clutchhousing (44). The main bearing (40) will be removed with the shaft andbearing carrier.


111



5. Remove the internal snapring (75) from the bearing carrier.

6. Remove the shaft and bearing from the bearing carrier (47). If necessary,the bearing carrier may be gently tapped off the bearing.

7. Remove the two external snap rings (58 & 59).

8. Use an arbor press to press the shaft out of the bearing (40).

9. Remove the grease fitting (51) from the bearing carrier.

112



Clutch Shaft and Housing Disassembly - Configurations F & G


Bearing

Carrier

(47)

Hex Head

Capscrew

(48)

Internal

Snap Ring

(75)

Bearing

(41)

Fitting

(57)

Housing

(44)

Washer

(49)

Bearing

Retainer

(38)

Bearing

(40)

Fitting

(51)

Figure 32. Illustration - Configuration F

Bearing

Carrier

(47)

Hex Head

Capscrew

(48)

Internal

Snap Ring

(75)

Bearing

(41)

Fitting

(57)

Housing

(44)

Washer

(49)

O-Ring

(78)

Bearing

Retainer

(38)

Bearing

(40)

Fitting

(51)

Oil Seal

(70)

Oil Seal

(68)

Figure 33. Illustration - Configuration G

113




2. Remove hex head capscrews (48) and washers (49) and remove thesupport plate if used.

3. Lift the clutch shaft (33) and bearing carrier (47) unit from the clutchhousing (44).


5. Remove the internal snap ring (75) from the bearing carrier (47).

6. Remove the bearing retainer (38).

7. Lift the clutch shaft with the two bearings (40 & 41) from the bearingcarrier.

8. Use an arbor press to remove the bearings from the clutch shaft. Thebearings remove in opposite directions from the shaft shoulder.

9. Remove the fitting (51) from the bearing retainer.

Configuration G only:

10. Remove the o-ring (78) from the bearing retainer.

11. Tap the front oil seal (68) out of the bearing retainer.

12. Remove the rear oil seal (70) from the bearing carrier.

114



Clutch Shaft and Housing Disassembly - Configurations H & I


External

Snap Ring

(75)

Bearing

(40)

Bearing

Carrier

(38)

Hex Head

Capscrew

(65)

Hex Head

Capscrew

(35)

Fitting

(57)

Housing

(44)

Bearing

Retainer

(64)

Fitting

(51)

Plug

(63)

External

Snap Ring

(73)

Bearing

(41)

Fitting

(50)

Dowel

(61) Sheave

Housing

(60)

Hex Head

Capscrew

(48)

Figure 34. Illustration - Configuration H

Wear

Sleeve

(67)

Bearing

(40)

Bearing

Carrier

(38)

Hex Head

Capscrew

(65)

Hex Head

Capscrew

(35)

Fitting

(57)

Housing

(44)

Bearing

Retainer

(64)

Fitting

(51)

Plug

(63)

Shim

(95)

Bearing

(41)

Fitting

(50)

Dowel

(61)

Sheave

Housing

(60)

Hex Head

Capscrew

(48)

Washer

(36)

Washer

(66)

Figure 35. Illustration - Configuration I

115



1. Remove the hex head capscrews and remove the support plate.

2. Securely support the pto so the output end of the clutch shaft faces upand is free to rotate. There should be a clearance below the input end ofthe clutch shaft.

3. Remove the hex head capscrews (48) that secure the sheave housing(60) to the clutch housing (44) and remove the sheave housing.

Note: The inner race of bearing (41) will remain on the shaft.

4. Remove the sheave from the shaft.

5. Remove the hex head capscrews (65) and (Configuration I only) washers(66) and remove the rear bearing retainer (64) from the sheave housing.

Configuration I only: (Configuration H skip to step 7)

6. Remove the shim (95) from on top of the bearing.

Configurations H & I:

7. Remove the outer race of bearing (41) from the sheave housing. Ifnecessary, remove plugs (63) and tap the race out using a punch throughthe plug holes.

8. Remove the fitting (50) from the bearing retainer.

9. Remove the hex head capscrews (35) and (Configuration I only) washers(36), and remove the front bearing retainer (38) from the clutch housing(44).

Configuration H only: (Configuration I skip to step 15)

10. Lift the clutch shaft (33) with the inner races of the front and rear bearings(40 & 41) and external snap rings (73 & 75) from the clutch housing.

11. Remove the rear external snapring (73) from the output end of the shaft.

12. Using a split-type bearing puller, remove the inner race of the rear bearing(41) from the shaft.

13. Remove the front external snap ring (75) from the shaft

116



14. Using a split-type bearing puller, remove the inner race of the front bearing(40) from the shaft.

Configuration I only:

15. Lift the clutch shaft (33) with the inner races of the front and rear bearings(40 & 41) and the wear sleeve (67) from the clutch housing.

16. Using a split-type bearing puller, remove the inner race of the rear bearing(41) from the shaft.

17. Using a split-type bearing puller, remove the inner race of the front bearing(40) from the shaft.

18. Remove the wear sleeve (67) only if it must be replaced. Use a split-type bearing puller to remove the wear sleeve.

117



Clutch Shaft and Housing Disassembly - Configuration J


Fitting

(51)

Bearing

(40)

Housing

(44)

External

Snap RIng

(58)

Bearing

Retainer

(38)

Retainer

Clip

(37)

Washer

(36)

Hex Head

Capscrew

(35)

Figure 36. Illustration - Configuration J

1. Support the pto on the bench with the input end up. Remove the hexhead capscrew (35), lock washer (36) and the retainer clip (37) so thebearing retainer (38) may be rotated.

2. Rotate the bearing retainer (35) counter-clockwise to remove it.

3. Lift the clutch shaft (33) with the bearing (40) from the housing.

4. Remove the external snapring (58).

5. Use an arbor press to remove the bearing from the clutch shaft.

Note: The external snapring is supplied with the new bearing.

6. Remove the grease fitting (51) from the housing.

118



NOTES

119

Twin Disc, Incorporated Cleaning and Inspection


Cleaning and Inspection

Cleaning and Inspection

Refer to the BOM, the exploded views in the Illustrations section and theEngineering Drawings near the back of this manual.

Bearings

1. Thoroughly wash bearings in clean solvent if they have been in service.Soak bearings in solvent if they are particularly dirty.

Never dry bearing with compressed air. Do not spin bearings whilethey are not lubricated. Oil bearings with SAE 10 engine oil immediatelyafter cleaning. Be sure bearings are oiled before inspection. Protectclean bearings, whether they are new or have been in service, fromdirt, dust, grit or any other contaminant.

2. Inspect bearings for roughness of rotation. Replace the bearing ifroughness is found.

3. Inspect bearings for corrosion, scored, scratched, cracked, pitted orchipped races, and for indication of excessive wear of balls or rollers.If one of the these defects is found, replace the bearing.

Preventing Entrance of Dirt Into Bearings

4. Dirt and grit in bearings are often responsible for bearing failure.Consequently, it is important to keep bearings clean. Do not removegrease from new bearings. Keep the wrapper on new bearings untilimmediately before they are to be installed. Do not expose new cleanbearings until they are ready to be used in the assembly. Keep themwrapped in clean lint-free cloth or paper to keep out dust and debris.Protect bearings from contamination even after they are installed onthe shaft or in the bore.

120

Twin Disc, IncorporatedCleaning and Inspection


Housings, Cast Parts and Machined Surfaces

5. Replace cast parts or housings that are cracked.

6. Inspect bearing bores for grooved, burred or galled conditions thatwould indicate that the bearing has been turning in its housing. If thedamage cannot be repaired to like-new condition with a crocus cloth,replace the part. Bore diameters must not exceed the maximumdimension shown in Wear Limits the Description and Specificationssection of this manual.

Typical Bearing Carrier or Housing bore area

Closely check bearing

bore for damage. Check threads or pilot

for damage.

Check face for

damage.

Figure 37. Inspect the bores, threads and faces

7. Inspect bores for wear, grooves, scratches and dirt. Remove burrsand scratches with crocus cloth or a soft stone. Replace parts thatare deeply grooved or scratched.

8. Inspect oil and grease passages for obstructions. If an obstruction isfound, remove it with compressed air or by working a wire or wirebrush back and forth through the passage and flushing it with solvent.

All grease and oil

p a s s a g e w a y s

must be clean.

Figure 38. Be sure passageways are clean.

121

Twin Disc, Incorporated Cleaning and Inspection


Shafts, seal lip contact surfaces and bearing journals

9. Inspect machined surfaces for burrs, scratches, nicks and foreignmatter. If such defects cannot be removed with crocus cloth or a softstone, replace the part.

10. Inspect bearing journals on the shaft for grooved, burred or galledconditions that would indicate that the bearing has been turning onthe shaft. If the damage cannot be repaired to like-new condition witha crocus cloth, replace the part. Bearing journal diameters must notbe less than the dimensions shown in Wear Limits the Descriptionand Specifications section of this manual.

11. Inspect the pilot bearing journal on the clutch shaft. If it is worn in anyway, or if it shows signs that the pilot bearing has been turning on thejournal, replace the clutch shaft. Pilot bearing journal diameters mustnot be less than the dimensions shown in Wear Limits the Descriptionand Specifications section of this manual.

1

2

3

5

4

Large Shoulder

Small Shoulder

6

7

8

9

10

Figure 39. Inspect bearing journals and seal journals

122

Twin Disc, IncorporatedCleaning and Inspection


12. Inspect seal journal surfaces on the shaft. Look especially for scratchesor nicks that extend above the shaft surface. If they cannot be removedusing a fine crocus cloth, replace the part. Seal journal diametersmust not be less than the dimensions shown in Wear Limits theDescription and Specifications section of this manual.

13. Inspect seal lip contact surfaces on wear sleeves and other surfaces.Look especially for scratches or nicks that intersect with or cross thelip contact area. If they cannot be removed using a very fine crocuscloth, replace the part.

14. Inspect threaded openings for damaged threads. Chase damagedthreads with a tap of the correct size.

15. Be sure the snap ring grooves have straight sides, especially if abearing failure has occurred.

Undamaged Groove Damaged Groove

Straight sides Damaged Wall

Figure 40. Snap ring grooves must have square sides

123

Twin Disc, Incorporated Assembly


Assembly

The following procedure is for complete assembly of the unit. Prior to thisprocedure, the power take-off should be removed from the engine. Qualifiedpersonnel should do the work in a fully equipped facility.

Note: Illustrations used here are to aid in understanding andcompleting the procedure, and may not appear to beconsistent with the previous assembly steps.

Note: Ten main bearing configurations are illustrated. Refer tothe Twin Disc Power Take-Off Reference Listing inthe Description and Specifications section to determinewhich configuration is used in your pto.

124

Twin Disc, IncorporatedAssembly


Clutch Assembly

Refer to the Twin Disc Power Take-Off Reference Listing in the Descriptionand Specifications section, the exploded views in the Illustrations sectionand Engineering Drawings near the back of this manual.

Bronze Throwout Collar only: (Ball Bearing Type Throwout Collarskip to step 3.)

1. Lubricate the shoulder of the sliding sleeve (27) with No. 30 engine oilprior to installation of the split collar. Place the throwout collar halvesover the sliding sleeve shoulder. Install 2 hex head capscrews 1/2� - 20x 3 1/4� through the halves. Install 2 hex nuts on the capscrews. Torquethe capscrews to the proper specifications given in Torque Values forFasteners in the Installation section.

Sliding

Sleeve

Nut

Capscrew

Collar

Halves 2322

21

20

19

18

Figure 41. Assembly of Bronze Throwout Collar

2. Check collar rotation to be sure it turns freely on the sliding sleeve.(Proceed at step 8.)

125



Ball Bearing Type Throwout Collar

3. Place the sliding sleeve (27) on the bed of a press with the bearing endup. Place the external snap ring (31) on the sleeve before the bearing isinstalled.

Figure 42. Assembly of Ball Bearing Type Throwout Collar

4. Press the ball bearing (30) on the sleeve. Press tight to stop against theshoulder.

Note: Pack the bearing with grease before installing it on thecollar.

Note: Apply force only against the inner race of the bearing.Pressing against the outer race or contact with the ballswill damage the bearing, leading to premature failure.

5. Install the external snap ring (29) to secure the bearing.

6. Install the throwout collar (28) over the bearing. Seat the collar tightagainst the bearing.

Excessive pressure or sharp impact against the outer race of thebearing during installation of the collar will damage the bearing, leadingto premature failure.

7. Turn the sliding sleeve assembly over on the bed of the press. Install theinternal snap ring (31) in the collar.

126



Assemble the plate stack

8. Set the hub and back plate (4) on a bench with the threaded and splinedsection facing up.

9. Install a friction plate (6) on the hub-and-backplate.

Figure 43. Typical SP111, SP211 and SP311 Plate Stack (SP311 is shown)

SP214, SPE214, SP314, SPE314, SP314SB, RFD214 and RFD314Series clutches only: (SP114 and SPE114 Series Clutches, skip tostep 14.)

10. Install a center plate (7) so it rests flat on the friction plate, meshing thesplines of the center plate and hub-and-backplate.

11. Install a second friction plate (6) on the center plate.

SP314, SPE314, SP314SB and RFD314 Series clutches only:(SP214, SPE214 and RFD214 Series clutches, skip to step 14.)

12. Install a second center plate (7) so it rests flat on the second frictionplate, meshing the splines of the center plate and hub-and-backplate.

13. Install a third friction plate on the second center plate assembly.

127



SP114, SPE114, SP214, SPE214, SP314, SPE314, SP314SB, RFD214and RFD314 Series clutches:

14. Install the pressure plate (8) on the top friction plate, meshing the splinesof the center plate and hub-and-backplate.

15. Install the adjusting lock pin spring (24) into the pocket in the pressureplate and install the adjusting lock pin (25) on the spring.

Figure 44. Illustration - Levers, Links, Sleeve, Throwout Collar

16. Push down on the pin, compressing the spring while screwing theadjusting yoke (26) partially onto the threaded part of the hub-and-backplate.

17. Place the levers (9) between the lugs of the pressure plate and secureto the pressure plate with four clevis pins (11).

Note: Hook each lever under the edge of the adjusting yoke whilealigning the clevis pin hole with the holes in the pressureplate lugs.

128



18. Place a washer (10) on each clevis pin and install four cotter pins (12).Spread the legs of the cotter pins as shown below.

14.7 mm. (0.58 in.) Radius (12)

11.9 mm. (0.47 in.) Radius (13 & 17)

Legs do not

extend outside

this area.

29.4 mm. (1.16 in.) Diameter (12)

23.8 mm. (0.94 in.) Diameter (13 & 17)

Figure 45. Spread the cotter pin legs

19. Attach eight lever links (15) one on each side of each of the four clutchlevers (9). Secure with four clevis pins (14) and four cotter pins (13).

20. Place the pre-assembled sliding sleeve (27) on the adjusting yoke,aligning the four lugs between the four pairs of lever links.

21. Attach the links to the sliding sleeve with four clevis pins (16) and fourcotter pins (17).

22. Install the hose fitting (18) in the collar trunnion, and attach the flexiblehose (19), hose fitting (20) and lubrication fitting (23).

129



Center the clutch plates

23. Visually center the friction plates (6) on the clutch and align the teeth.Press down on the collar assembly to lock the plates in place. Ifnecessary, pull the adjustment lock pin to compress the lock pin spring,and rotate the adjusting yoke assembly until the plates are locked inposition when the collar is pressed down.

Note: This is an initial setting to hold the plates in place untilafter the pto is mounted on the engine, so it is imperativethat the teeth be exactly aligned and the plates are exactlycentered on the clutch. The driving ring may be used asan alignment fixture to align the teeth and center the platesrelative to the hub-and-backplate so they are perfectlyaligned when the pto is installed on the engine.

Wooden block

(use 3) to hold

driving ring in

position

Teeth

Perfectly

center the clutch in the drive ring.

(This gap is to be exactly equal

all the way around.)

Driving Ring

(1)

Bench

Figure 46. Align the Plate Stack

130



Proceed to Clutch Shaft and Housing Assembly:Ten main bearing configurations are illustrated. Refer to the Twin Disc PowerTake-Off Reference Listing in the Description and Specifications section todetermine which configuration is used in your PTO.

Skip to:Clutch Shaft and Housing Assembly - Configuration AClutch Shaft and Housing Assembly - Configuration BClutch Shaft and Housing Assembly - Configuration CClutch Shaft and Housing Assembly - Configuration DClutch Shaft and Housing Assembly - Configuration EClutch Shaft and Housing Assembly - Configuration FClutch Shaft and Housing Assembly - Configuration GClutch Shaft and Housing Assembly - Configuration HClutch Shaft and Housing Assembly - Configuration IClutch Shaft and Housing Assembly - Configuration J

131



Clutch Shaft and Housing Assembly - Configuration A


Hex Head

Capscrew

(35)

Washer

(36)

Retainer

Clip

(37)

Bearing

Retainer

(38)

Bearing

Cup

(39)

Bearing

Cone

(41)

Plug

(43)

Bearing

Cone

(40)

Bearing

Cup

(42)

Fitting

(57)

Housing

(44)

Figure 47. Illustration - Configuration A

Install main bearings on the clutch shaft

1. Clean the tapered bearing cones (40 & 41) and clutch shaft (33) withisopropyl solvent to remove any oil or grease residue.

Note: Do not use any oil or paraffin based solvents.

2. Use an arbor press to install the two bearing cones on the clutch shaft.Install the cones, one from each end, with the back faces (wide section)butting against the shoulder on the clutch shaft. (See note belowregarding alternative installation method. )

Note: Special tools are not available from Twin Disc, Inc., butcan be fabricated in any capable machine shop.

Note: Use a piece of steel tubing approximately 5 cm. (2 inches)

132



longer than the distance from the end of the shaft to theshoulder and just slightly larger in inside diameter thanthe bearing cone�s inside diameter. The tubing must notbe thick enough to contact the cage of the bearing duringinstallation.

Press Ram

Flat Plate (tool)

Press Tube

Output end of

Clutch Shaft (33)

Bearing Cone (41)

Note: I.D. of Press Tube is

slightly larger than the I.D.

of the bearing.

Note: Thickness of

Press Tube wall must

contact ONLY the

inner race of the

bearing.

Note: Bearing must

be pressed tight

against the shoulder.

Figure 48. Install bearing cones on the shaft

Note: An alternative method to install the bearing cones is toheat them in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let the bearingcone cool to room temperature after installation whilecontinuing to apply force as the bearing cools. This isnecessary to ensure that it remains properly seated.

3. After the bearings return to room temperature, coat the bearing rollersand both bearing cups with a light film of clean No. 30 engine oil.

Clutch housing

4. Set the clutch housing (44) on the bed of a press with the input end ofthe housing facing up.

Note: There should be sufficient clearance below the housingto allow for installation of the clutch shaft.

133



5. Install 2 lubrication fittings (57) if they were removed.

6. Use a round steel plate slightly smaller in diameter than the outerdiameter of the rear main bearing cup (42). Place the bearing cup onthe housing, back (wide section) face down. Be sure the plate does notpress against the bearing cup�s roller contact surface in the cup. Pressthe cup to the bottom of the bore.


Note: Installation TipA scrap bearing cup the same size as the one beinginstalled (41) may be used as an installation tool in additionto a flat plate.

Press bearing

cup to bottom of

the bore.

Press Ram

Flat Plate (tool)

Scrap Bearing Cup

used upside down

Housing (44)

New Bearing Cup (42)

Figure 49. Install the rear bearing cup (42)

Install the clutch shaft and bearings into the housing.

7. Carefully install shaft and bearings in the housing. The output end of theshaft must enter the housing first.

Note: DO NOT pre-grease the bearings prior to installation intothe housing.

8. Install the front bearing cup (39) in the bore on top of the upper bearingcone. Press it tight against the cone.

9. Install the bearing retainer (38) in the housing. Thread the bearing retainertight against the bearing.

Note: The notches must be up.

134



(Preliminary setting) Measure and set bearing end play.

The only approved method for adjustment of tapered roller bearings inTwin Disc Power Take-Offs is by use of a dial indicator to read actualbearing end play. This preliminary setting is for assembly purposes only.Final bearing end play must be adjusted as described below in “(Finalsetting) Measure and set bearing end play.”

10. Tighten the bearing retainer until 6.8 Nm. (60 in.-lbs.) of torque is requiredto rotate the shaft.

Note: Do not overtighten! Damage may occur to the bearingsor bearing retainer.

Rotate the shaft several revolutions. This aligns and seats the bearingcones in the bearing cups and creates a �zero� clearance.

11. Note the position of any one of the notches in the bearing retainer relativeto the threaded hole for the retainer lock capscrew.

Bearing

Retainer

Notches

Figure 50. Bearing Retainer Notches

For side-load applications:Back off the bearing retainer (38) to create a clearance between thebearing retainer and bearing cup. The notch closest to the threadedhole (aligned with or clockwise from the hole) is the first notch.

SP114 Series with Bearing Retainer A3050:Back off 3 1/2 - 4 1/2 notches

SP214, SP314 Series with Bearing Retainer B5183, A3308 orA3308B: Back off 2 3/4 - 3 3/4 notches

135



For in-line applications:Back off the bearing retainer (38) to create a clearance between thebearing retainer and bearing cup.

SP114 Series with Bearing Retainer A3050:Back off 4 1/2 - 5 1/2 notches


Note: Bump the output end of the shaft with a soft mallet hardenough to move and seat the front bearing cup up againstthe bearing retainer and create the specified bearingclearance after each adjustment of the bearing retainer.

136



(Final setting) Measure and set bearing end play





Use a Hoist

and swivel

hook.

Dial indicator

Bearing

Retainer

Note: Typical housing

configuration is

illustrated. Your

housing may be

designed differently.

Bearing

Retainer Lock

Figure 51. Measuring and setting bearing end play

137




17. Repeat steps 15 and 16 to be sure the dial indicator reading repeatswith accuracy. Adjust the bearing retainer as necessary to obtain 0.152- 0.254 mm. (0.006 - 0.010 in.) bearing end play. (See note below.)

Note: For in-line operation: Adjust the bearing retainer asnecessary to obtain 0.229 - 0.305 mm. (0.009 - 0.012 in.)bearing end play.

.18. Once the bearing end play adjustment is completed, match-mark the

bearing retainer and bearing housing so the bearing retainer may beremoved and reinstalled in the same exact position.

19. After match-marking the bearing retainer and bearing housing, removethe bearing retainer (38) and front bearing cup (39).

20. Remove the shaft and hand-pack the bearing cones (40 & 41) withgrease specified in the lubrication specifications in the Maintenancesection. See information regarding Filling the Main Bearing Cavityat initial assembly in the Description and Operation section of thismanual.

Note: Do not pack the bearing carrier cavity with grease. Theproper amount of grease will be added later.

21. Reinstall the shaft with bearings, front bearing cup and bearing retainer.Position the bearing retainer exactly as it was prior to removal. Realignthe match-marks.

22. Install the retainer clip (37), hex head capscrew (35) and washer (36).Torque the capscrews to the proper specifications given in TorqueValues for Fasteners in the Description and Specifications section.


(Proceed to Install the Operating Shaft and Throwout Yoke)

138



Clutch Shaft and Housing Assembly - Configuration B


Hex Head

Capscrew

(65)

Retainer

Clip

(63)

Housing

(44)

Retainer

(64)

Bearing

Cup

(39)

Bearing

Cone

(41)

Bearing

Cone

(40)

Bearing

Cup

(42)

Bearing

(43)

Retainer

(38)

Hex Head

Capscrew

(35)

Fitting

(51)

Fitting

(50)

Fittings

(57)

Figure 52. Illustration - Configuration B

Install main bearings on the clutch shaft

1. Clean the tapered bearing cones (40 & 41) and clutch shaft with isopropylsolvent to remove any oil or grease residue.


2. Use an arbor press to install the two bearing cones on the clutch shaft.Install the cones, one from each end, with the back faces (wide section)butting against the shoulder on the clutch shaft. (See note belowregarding alternative installation method.)


Note: Use a piece of steel tubing approximately 5 cm. (2 inches)longer than the distance from the end of the shaft to theshoulder and just slightly larger in inside diameter thanthe bearing cone�s inside diameter. The tubing must not

139



be thick enough to contact the cage of the bearing duringinstallation.

Press Ram

Flat Plate (tool)

Press Tube

Output end of

Clutch Shaft (33)

Bearing Cone (41)



of the bearing.

Note: Thickness of


contact ONLY the

inner race of the

bearing.

Note: Bearing must

be pressed tight



Note: An alternative method to install the bearing cones is toheat them in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let the bearingcone cool to room temperature after installation whilecontinuing to apply force as the bearing cools. This isnecessary to ensure that it remains properly seated.

3. After the bearings return to room temperature, coat the bearing rollersand both bearing cups with a light film of clean No. 30 engine oil.

4. Clean the inner race of front bearing (43) and clutch shaft with isopropylsolvent to remove any oil or grease residue.


5. Use an arbor press to install the race on the clutch shaft. Install the racefrom the input end, with the taper toward the front end of the shaft andthe back face (no taper) butting against the shoulder on the clutch shaft.(See note below regarding alternative installation method. )


140



Note: Use a piece of steel tubing approximately 5 cm. (2 inches)longer than the distance from the end of the shaft to theshoulder and just slightly larger in inside diameter thanthe bearing race�s inside diameter.

Clutch housing

6. Set the clutch housing (44) on the bed of a press with the output end ofthe housing facing up.

7. Install 2 plugs (57) if they were removed.

8. Use a round steel plate slightly smaller in diameter than the outerdiameter of the forward main bearing cup (39). Place the bearing cupon the housing, back (wide section) face down. Be sure the plate doesnot press against the bearing cup�s roller contact surface in the cup.Press the cup to the bottom of the bore.


Note: Installation TipA scrap bearing cup the same size as the one beinginstalled (39) may be used as an installation tool in additionto a flat plate.

Press bearing

cup to bottom of

the bore.

Press Ram

Flat Plate (tool)

Scrap Bearing Cup

used upside down

Housing (44)


Figure 54. Install the forward bearing cup (39)

141



Install the clutch shaft and bearing into the housing.

9. Carefully install shaft and bearings in the housing. The input end of theshaft must enter the housing first.

Note: DO NOT pre-grease the bearings prior to installation intothe housing.

10. Install the rear bearing cup (42) in the bore on top of the upper bearingcone. Press it tight against the cone.

11. Install the rear bearing retainer (64) in the housing. Thread the bearingretainer tight against the bearing cup.


(Preliminary setting) Measure and set bearing end play.


12. Tighten the bearing retainer (64) until 6.8 Nm. (60 in.-lbs.) of torque isrequired to rotate the shaft.



142




Bearing

Retainer

Notches



Back off 3 1/2 - 4 1/2 notches


Back off 4 1/2 - 5 1/2 notches


14. Turn the housing over with the input end up. Install the outer race of frontbearing (43).

15. Install front bearing retainer (38) tight against the bearing race.

16. Install four hex head capscrews (35) to secure the bearing retainer tothe housing. Torque the capscrews to the proper specifications given inTorque Values for Fasteners in the Description and Specificationssection.

143








Use a Hoist

and swivel

hook.

Dial indicator

Bearing

Retainer


configuration is

illustrated. Your

housing may be


Bearing

Retainer Lock



144





23. Once the bearing end play adjustment is completed, match-mark thebearing retainer and bearing housing so the bearing retainer may beremoved and reinstalled in the same exact position.

24. After match-marking the bearing retainer and bearing housing, removethe bearing retainer (64) and rear bearing cup (42).

25. Remove the shaft and hand-pack the bearing cones (40 & 41) withgrease specified in the lubrication specifications in the Maintenancesection. See information regarding Filling the main bearing cavity atinitial assembly in the Description and Operation section of thismanual.




Note: Bump the output end of the shaft with a soft mallet (asdescribed in the previous step above) hard enough tomove and seat the front bearing cup up against the bearingretainer and create the specified bearing clearance aftereach adjustment of the bearing retainer.


145



Clutch Shaft and Housing Assembly - Configurations C & D


Bearing

Cup

(39)

Bearing

Retainer

(38)

Bearing

Carrier

(47)

Hex Head Capscrew (48)

& Washer (49)

Retainer

Clip

(37)

Hex Head

Capscrew

(35)

Washer

(36)

Bearing

Cone

(41)

Plug

(52)

Fitting

(57)

Bearing

Cup

(42)

Bearing

Cone

(40)

Housing

(44)

Figure 57. Illustration - Configuration C

Bearing

Cup

(39)

Bearing

Retainer

(38)

Bearing

Carrier

(47)

Hex Head

Capscrew

(48)

Retainer

Clip

(37)

Hex Head

Capscrew

(35)

Washer

(36)

Bearing

Cone

(41)

Breather

(72)

Fitting

(57)

Bearing

Cup

(42)

Bearing

Cone

(40)

Housing

(44)

Pipe Plug

(71)

Wear

Sleeve

(67)

Oil Seal

(68)

O-Ring

(78)

Wear

Sleeve

(69)

Oil Seal

(70)

Plug

(52)Oil Level Check Plugs (94) (not shown) in

sides of bearing housing

Figure 58. Illustration - Configuration D

146



Clutch Shaft

1. Clean the tapered bearing cones (40 & 41) and clutch shaft (48) withisopropyl solvent to remove any oil or grease residue.


2. Use an arbor press to install the two bearing cones on the clutch shaft.Install the cones, one from each end, with the back faces (wide section)butting against the shoulder on the clutch shaft. Use a piece of steeltubing approximately 5 cm. (2 inches) longer than the distance from theend of the shaft to the shoulder and just slightly larger in inside diameterthan the bearing cone�s inside diameter. The tubing must not be thickenough to contact the cage of the bearing during installation.

Note: An alternative method to install the bearing cones is toheat them in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let the bearingcones cool to room temperature after installation. Continueto apply force as the bearing cools to room temperatureensuring that it remains seated.

Press Ram

Flat Plate (tool)

Press Tube

Output end of

Clutch Shaft (33)

Bearing Cone (41)



of the bearing.

Note: Thickness of


contact ONLY the

inner race of the

bearing.

Note: Bearing must

be pressed tight



147




3. Coat the I.D. of the rear wear sleeve (69) with an anaerobic sealantTwin Disc part number M2828. Press the sleeve onto the shaft. The flatend of the sleeve should be nearest the rear bearing cone. Whenpositioned properly, the contoured side will align exactly with the shoulderof the shaft. Be sure the contour blends in with the shoulder of the clutchshaft. Remove excess sealant when sleeve is in its proper position onthe shaft.

Shaft shoulderShaft wear sleeve shoulder

Contour is flush.

Wear sleeve

Figure 60. Locating the oil seal wear sleeve on the shaft

4. Turn the shaft over with the input end up. Install the front wear sleeve (67)as described above for the rear wear sleeve.

Bearing Carrier


5. Set the bearing carrier (47) on the bed of a press with the output end ofthe housing facing up.

6. Rest the rear oil seal (70) in the housing bore; the seal lip should bedown, extending toward the front end of the bearing carrier. Use a flatsteel plate slightly larger in diameter than the O.D. of the oil seal. Pressthe seal straight into the bore until the steel plate stops against the surfaceof the housing. The top end of the outer shell of the seal should be flushwith the surface of the housing. Pre-lubricate the seal lip with clean No.30 engine oil.

Note: Press only on the outer shell of the seal. Do not damagethe seal lip.

7. Install the two oil level check plugs (94) and the bottom pipe plug (71) inthe bearing carrier.

148




8. Support the bearing carrier (47) on the bench so the input end is up.Use a piece of steel tubing or round plate slightly smaller in diameterthan the outer diameter of the rear main bearing cup. Place the bearingcup (41) on the carrier, back face down. Be sure the steel tubing or platedoes not press against the bearing contact surface in the cup. Pressthe cup to the bottom of the bore.

Press bearing

cup to bottom of

the bore.

Press Ram

Flat Plate (tool)

Scrap Bearing Cup

used upside down

Bearing Carrier (47)


Note: Bearing Carrier Configuration C is illustrated.

Figure 61. Install the rear bearing cup (41)

9. Coat the bearing rollers and both bearing cups with a light film of cleanNo. 30 engine oil.


10. Pre-lubricate the wear sleeve surfaces with clean No. 30 engine oil inpreparation for installation of the shaft into the bearing retainer.

Install the clutch shaft and bearing cones into the bearing carrier.

11. Place the bearing carrier (47) in a large bench vise with protective jawsor securely support it on a bench with the input end up. There must besufficient clearance below the carrier to install the shaft. Carefully installshaft and bearings in the bearing carrier. Be careful to not damage theseal lip as the shaft is installed through it.

12. Install the forward bearing cup (39) into the bearing carrier.

149



13. Install the bearing retainer (38) over the clutch shaft, resting against thebearing cup.

Note: (Applicable to Configuration D only) Do not install the o-ring (78) on the bearing retainer at this time.

(Preliminary setting) Measure and set bearing end play






Bearing

Retainer

Notches


150








151








Use a Hoist

and swivel

hook.

Dial indicator

Bearing

Retainer

Lock

Bearing

Retainer


configuration is

illustrated. Your

housing may be



152






Configuration C only (Configuration D (oil lubricated) skip to step 26)

22. Once the bearing end play adjustment is completed, match-mark thebearing retainer and bearing housing so the bearing retainer may beremoved and reinstalled in the same exact position.

23. After match-marking the bearing retainer and bearing housing, removethe bearing retainer (38) and front bearing cup (39).

24. Remove the shaft and hand-pack the bearing cones (40 & 41) withgrease specified in the lubrication specifications in the Maintenancesection. See information regarding Filling the Main Bearing Cavityat initial assembly in the Description and Operation section of thismanual.




153



Configurations C and D


27. Install plugs (52) in the output end of the bearing carrier.

Install the bearing carrier unit on the clutch housing.


29. Set the clutch housing (44) on a work bench, securely supported withwooden blocks, with the input end of the housing facing down. Thereshould be sufficient clearance below the housing to allow for installationof the clutch shaft.

30. Lift the bearing carrier and shaft using a hoist securely attached to it.Carefully lower the bearing carrier and shaft onto the clutch housing.Disconnect the hoist. Position the carrier so the grease fitting (51) (orbreather if Configuration D) will be up when the clutch housing is in itsfinal position on the engine.

31. Attach the support plate if used, and secure the bearing carrier to theclutch housing with six hex-head capscrews (48) and washers (49).Torque the capscrews to the proper specifications given in TorqueValues for Fasteners in the Description and Specifications section.



154



Clutch Shaft and Housing Assembly - Configuration E


Fitting

(51)

Hex Head

Capscrew

(48)

Internal

Snap Ring

(75)

Fitting

(57)

Bearing

(40)

Housing

(44)

External

Snap RIng

(58)

Washer

(49)

External

Snap RIng

(59)

Bearing

Carrier

(47)

Figure 64. Illustration - Configuration E

Clutch shaft

1. Clean the main bearing (40) and clutch shaft (33) with isopropyl solventto remove any oil or grease residue.


2. Support the shaft with the input end up. Install the lower snap ring (59) inthe lower groove.

3. Use an arbor press to install the bearing (40) on the clutch shaft (33).

155



Install the bearing on the clutch shaft, pressing it tight against the snapring. Use a piece of steel tubing approximately 5 cm. (2 in.) longer thanthe distance from the end of the shaft to the snap ring and just slightlylarger in inside diameter than the bearing �s inside diameter. (see notebelow regarding special tools.)

Do not press the bearing too tight against the snap ring. The snap ringmay be damaged and forced out of the groove. The groove may also bedamaged, rendering the shaft unusable.


Note: An alternative method to install the bearings is to heatthem in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let the bearingcone cool to room temperature after installation whilecontinuing to apply force as the bearing cools. This isnecessary to ensure that it remains properly seated.

Press Ram

Flat Plate (tool)

Press Tube

Clutch Shaft (33)

Bearing (40)



of the bearing.

Note: Thickness of


contact ONLY the

inner race of the

bearing.

Note: Bearing must

be pressed tight

against the snap ring.

External Snap

Ring (59)


156



4. Install the upper snap ring (58) in the upper groove.

Install the clutch shaft and bearings into the bearing carrier.

5. Place the bearing carrier (47) in a large bench vise with protective jawsor securely support it on a bench with the input end up. There must besufficient clearance below the carrier to install the shaft.

Note: Pre-grease the bearing prior to assembly.

6. Carefully install shaft and bearing in the bearing carrier. The output endof the shaft must enter the carrier first.

7. Install the internal snap ring (75) in the bearing carrier.



9. Install two grease fittings (57) if they were removed.

10. Lift the bearing carrier and shaft using a hoist securely attached to it.Carefully lower the bearing carrier and shaft onto the clutch housing.Disconnect the hoist. Position the carrier so the grease fitting (51) willbe up when the clutch housing is in its final position on the engine.


157



Clutch Shaft and Housing Assembly - Configurations F & G


Bearing

Carrier

(47)

Hex Head

Capscrew

(48)

Internal

Snap Ring

(75)

Bearing

(41)

Fitting

(57)

Housing

(44)

Washer

(49)

Bearing

Retainer

(38)

Bearing

(40)

Fitting

(51)

Figure 66. Illustration - Configuration F

Bearing

Carrier

(47)

Hex Head

Capscrew

(48)

Internal

Snap Ring

(75)

Bearing

(41)

Fitting

(57)

Housing

(44)

Washer

(49)

O-Ring

(78)

Bearing

Retainer

(38)

Bearing

(40)

Fitting

(51)

Oil Seal

(70)

Oil Seal

(68)

Figure 67. Illustration - Configuration G

158



Clutch Shaft

1. Clean the front and rear tapered bearings (40 & 41) and clutch shaft(33) with isopropyl solvent to remove any oil or grease residue.


2. Use an arbor press to install the two bearings on the clutch shaft. Installthe bearings, one from each end, butting against the shoulder on theclutch shaft. Use a piece of steel tubing approximately 5 cm. (2 inches)longer than the distance from the end of the shaft to the shoulder andjust slightly larger in inside diameter than the bearing cone�s insidediameter. The tubing must not be thick enough to contact the cage of thebearing during installation.

Note: An alternative method to install the bearings is to heatthem in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let thebearings cool to room temperature after installation.Continue to apply force as the bearing cools to roomtemperature ensuring that it remains seated.

Press Ram

Flat Plate (tool)

Press Tube

Output end of

Clutch Shaft (33)

Bearing (41)



of the bearing.

Note: Thickness of


contact ONLY the

inner race of the

bearing.

Note: Bearing must

be pressed tight


Figure 68. Install rear main bearing (41) on the shaft

159



Bearing Carrier

Configuration G only: (Configuration F skip to step 6)

3. Set the bearing carrier (47) on the bed of a press with the output end ofthe housing facing up.

4. Rest the rear oil seal (70) in the housing bore; the seal lip should bedown, extending toward the front end of the bearing carrier. Use a flatsteel plate slightly larger in diameter than the O.D. of the oil seal. Pressthe seal straight into the bore until the steel plate stops against the surfaceof the housing. The top end of the outer shell of the seal should be flushwith the surface of the housing. Pre-lubricate the seal lip with clean No.30 engine oil.

Note: Press only on the outer shell of the seal. Do not damagethe seal lip.

5. Coat the bearings with a light film of clean No. 30 engine oil.

Configuration F only: (Configuration G (oil lubricated) skip to step 7)

6. Hand pack the bearings with grease as described in the Descriptionand Specifications section.

Install the clutch shaft and bearings into the bearing carrier.

Configurations F & G:

7. Place the bearing carrier (47) in a large bench vise with protective jawsor securely support it on a bench with the input end up. There must besufficient clearance below the carrier to install the shaft. Carefully installshaft and bearings in the bearing carrier. Be careful to not damage theseal lip as the shaft is installed through it.

8. Install the shaft with the bearings in the bearing carrier. The lower bearingmust seat securely in the bottom of the bore.

160



Configuration G only: (Configuration F skip to step 10)

9. Install the o-ring (78) in the groove on the O.D. of the bearing retainer(38). Coat the o-ring with a light film of clean No. 30 engine oil.

Configurations F & G:

10. Install bearing retainer (38) in the bearing carrier (47) resting securelyagainst the front bearing (40).

11. Install the internal snap ring (75) in the groove of the bearing carrier. Besure it is securely seated in the groove.



13. Lift the bearing carrier and shaft using a hoist securely attached to it.Carefully lower the bearing carrier and shaft onto the clutch housing.Disconnect the hoist. Position the carrier so the fitting (51) will be upwhen the clutch housing is in its final position on the engine.




161



Clutch Shaft and Housing Assembly - Configurations H & I


External

Snap Ring

(75)

Bearing

(40)

Bearing

Carrier

(38)

Hex Head

Capscrew

(65)

Hex Head

Capscrew

(35)

Fitting

(57)

Housing

(44)

Bearing

Retainer

(64)

Fitting

(51)

Plug

(63)

External

Snap Ring

(73)

Bearing

(41)

Fitting

(50)

Dowel

(61) Sheave

Housing

(60)

Hex Head

Capscrew

(48)

Figure 69. Illustration - Configuration H

Wear

Sleeve

(67)

Bearing

(40)

Bearing

Carrier

(38)

Hex Head

Capscrew

(65)

Hex Head

Capscrew

(35)

Fitting

(57)

Housing

(44)

Bearing

Retainer

(64)

Fitting

(51)

Plug

(63)

Shim

(95)

Bearing

(41)

Fitting

(50)

Dowel

(61)

Sheave

Housing

(60)

Hex Head

Capscrew

(48)

Washer

(36)

Washer

(66)

Figure 70. Illustration - Configuration I

162



Clutch Shaft

1. Clean the front and rear bearing inner races (40 & 41) and clutch shaft(33) with isopropyl solvent to remove any oil or grease residue.


Configuration I only (Configuration H skip to step 3)

2. Coat the I.D. of the wear sleeve (67) with an anaerobic sealant TwinDisc part number M2828. Use a piece of steel tubing approximately 5cm. (2 inches) longer than the distance from the end of the shaft to theshoulder and just slightly larger in inside diameter than the wear sleeve�sinside diameter. Press the sleeve onto the shaft, tight against theshoulder. The sleeve is to be installed from the forward end of the shaft.


Note: An alternative method to install the sleeve is to heat it inan oven at 135° C. (275° F.) for one hour and install itimmediately on the clutch shaft. Let the sleeve cool toroom temperature after installation. Continue to apply forceas the sleeve cools to room temperature ensuring that itremains seated.

Press Ram

Flat Plate (tool)

Press Tube

Clutch Shaft (33)

Wear Sleeve (67)



of the sleeve.

Note: Sleeve must be

pressed tight against

the shoulder.

Figure 71. Install wear sleeve on the shaft

163




3. Use an arbor press to install the front bearing inner race (40) on theclutch shaft. Install the race, butting tight against the shoulder on theclutch shaft or (Configuration I only) against the wear sleeve. Use apiece of steel tubing approximately 5 cm. (2 inches) longer than thedistance from the end of the shaft to the shoulder and just slightly largerin inside diameter than the race�s inside diameter.


Note: An alternative method to install the bearing race is to heatthem in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let the racecool to room temperature after installation. Continue toapply force as they cool ensuring that they remain seated.(Proceed at step 4.)

Press Ram

Flat Plate (tool)

Press Tube

Clutch Shaft (33)

Front Bearing

Inner Race (40)



of the sleeve.

Note: Conf. H: Race

must be pressed tight


(Wear Sleeve is not

used.)

Note: Conf. I: Race

must be pressed tight

against the wear

Sleeve.)

Wear Sleeve (67)

Figure 72. Install the front bearing inner race on the shaft

164




4. Install the external snap ring (75) in the shaft groove next to the frontbearing (40). Be sure the snap ring is correctly seated in the groove.


5. Use an arbor press to install the inner race of rear bearing (41) on theclutch shaft. Install the race, butting tight against the shoulder on theclutch shaft. Use a piece of steel tubing approximately 5 cm. (2 inches)longer than the distance from the end of the shaft to the shoulder andjust slightly larger in inside diameter than the race�s inside diameter.


Note: An alternative method to install the bearing race is to heatthem in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let the racecool to room temperature after installation. Continue toapply force as they cool ensuring that they remain seated.

Press Ram

Flat Plate (tool)

Press Tube

Output end of

Clutch Shaft (33)

Bearing Inner

Race (41)



of the bearing.

Note: Bearing must

be pressed tight


Figure 73. Install the rear bearing inner race on the shaft

165




6. Install the external snap ring (73) in the shaft groove next to the rearbearing (41). Be sure the snap ring is correctly seated in the groove.

Install the clutch shaft and bearings into the main housing.


7. Support the housing (44) with the output end up. There must be sufficientclearance below the housing to install the shaft.

8. Hand pack the bearings with grease as described in the Descriptionand Specifications section.

9. Apply grease to the circumferential cavities in the housing (44) andbearing retainer (38) as a seal against water and contaminants, and tothe inside surfaces of the housing and bearing retainer that contact thebearing.

Grease Locations

Bearing Retainer (38)

Housing (44)

Figure 74. Apply grease before assembly

10. Carefully install the outer race of the front bearing (40) in the housingbore.

166



11. Carefully install shaft in the housing.

Use extra care to prevent damage to the bearing rollers or races duringshaft installation. Damage will cause premature failure.

12. Install the bearing retainer (38) on the housing and secure with six hexhead capscrews (35) and (Configuration I only) six washers (36). Torquethe capscrews to 80 Nm (59 lb.-ft.).


14. Determine the position the sheave housing will be in when the pto isinstalled on the engine. The sheave housing must be piloted on bothdowel pins. Install the dowel pins (61) in the appropriate holes in themain housing.

15. Apply grease to the circumferential cavities in the sheave housing (60)and bearing retainer (64) as a seal against water and contaminants,and to the inside surfaces of the housing and bearing retainer that contactthe bearing.

Grease Locations

Bearing Retainer (64)

Sheave Housing (60)

Figure 75. Apply grease before assembly

16. Install the sheave housing (60), locating it on the dowel pins. Secure itwith the (six or eight) hex head capscrews (48) and (Configuration Ionly) eight washers (49).

167



17. Install the outer race of the rear bearing (41) in the sheave housing. Tapthe race to the bottom of the bore.

18. Hand pack the bearing with grease as described in the Descriptionand Specifications section.

19. Install the fittings (63) in the sheave housing if they were removed.

20. Install the bearing retainer (64) on the sheave housing and secure withthree hex head capscrews (65) and (Configuration I only) three washers(66). Torque the capscrews to the proper specifications given in TorqueValues for Fasteners in the Description and Specifications section.

Measure the bearing end play (shaft movement)

21. Insure that the proper amount of bearing end play exists. Proceed asinstructed in Checking Bearing End Play - Model SB314SB as shownin the Maintenance section of this manual

Configuration I only:

22. If the end play is not as specified, remove the hex head capscrews andwashers, and remove the bearing retainer (64).

23. Install or remove shims (95) to obtain the proper end play.

a. Record the end play reading from step 21.

b. Subtract 0.055 mm (0.002 inches) from the reading.

c. The difference between the two figures is the thickness of shimsthat must be added or removed.

End Play Reading - 0.055 mm (0.002 inches) =Shim thickness

24. Repeat steps 21 through 23 until the end play measurement is asspecified.


168



Clutch Shaft and Housing Assembly - Configuration J


Fitting

(51)

Bearing

(40)

Housing

(44)

External

Snap RIng

(58)

Bearing

Retainer

(38)

Retainer

Clip

(37)

Washer

(36)

Hex Head

Capscrew

(35)

Figure 76. Illustration - Configuration J

Clutch shaft

1. Clean the main bearing (40) and clutch shaft (33) with isopropyl solventto remove any oil or grease residue.


2. Support the shaft with the input end up. Use an arbor press to install thebearing (40) on the clutch shaft (33).

Note: The external snapring of the bearing must be up, towardthe input end of the shaft.

169



Install the bearing on the clutch shaft, pressing it from the input end, tightagainst the shoulder. Use a piece of steel tubing approximately 5 cm. (2in.) longer than the distance from the end of the shaft to the shoulder andjust slightly larger in inside diameter than the bearing �s inside diameter.(see note below regarding special tools.)


Note: An alternative method to install the bearings is to heatthem in an oven at 135° C. (275° F.) for one hour andinstall them immediately on the clutch shaft. Let the bearingcone cool to room temperature after installation whilecontinuing to apply force as the bearing cools. This isnecessary to ensure that it remains properly seated.

Press Ram

Flat Plate (tool)

Press Tube

Input end of

Clutch Shaft (33)

Bearing (40)



of the bearing.

Note: Thickness of


contact ONLY the

inner race of the

bearing.

Note: Bearing must

be pressed tight


External Snapring

of Bearing must

be up (toward

input end of

shaft).

Figure 77. Install bearing on the shaft

170



3. Install the external snap ring (73) in the shaft groove next to the rearbearing (41). Be sure the snap ring is correctly seated in the groove.

Install the clutch shaft and bearings into the main housing.


5. Support the housing (44) with the input end up. There must be sufficientclearance below the housing to install the shaft.

6. Carefully install shaft and bearing in the housing. The output end of theshaft must enter the housing first.

Note: Insure that the snapring of the bearing is tight against thehousing.

7. Install the bearing retainer (38) in the housing. Thread the bearing retainertight against the bearing.




9. Note the position of any one of the notches in the bearing retainer relativeto the threaded hole for the retainer lock capscrew. Back the bearingretainer off until the nearest notch aligns with the threaded hole.



171



Install the Operating Shaft and Throwout Yoke.

Refer to the BOM, Twin Disc Power Take-Off Reference Listing in theDescription and Specifications section, the exploded views in the Illustrationssection and Engineering Drawings near the back of this manual.

SPE114, SPE214, and SPE314 Series only: (SPE114, SP214, SP314,SP314SB, RFD214 and RFD314 Series, skip to step 2.)

1. Install the two Camrols (92) into the throwout yoke (54). Position theCamrols toward the inside of the yoke and the nuts (93) on the outside.Install a hex nut on each Camrol and torque the nuts to 17-21 Nm (13-16lb.-ft.).

SP114, SPE114, SP214, SPE214, SP314, SPE314, SP314SB, RFD214and RFD314 Series:

2. Position the clutch housing on a bench with the input end facing up.Install the operating shaft (55) halfway into the clutch housing. Slip thethrowout fork (54) onto the operating shaft and push the shaft through tothe hole on the other side of the clutch housing far enough to exposeone of the woodruff key slots at the center of the throwout fork.

3. Install one woodruff key (56) in the operating shaft.

Clutch Shaft (33)

Bearing

Carrier (47)

Note position

of throwout fork

(54)

O p e r a t i n g

Shaft (55)

Figure 78. Install the throwout fork

4. Push the operating shaft the other way to expose the other key slot inthe center of the fork.

5. Install the other woodruff key (56).

172



6. Center the operating fork so the hex head capscrews will enter thebottom of the throwout fork and thread into the top section. Install the twohex-head capscrews and tighten. Torque the capscrews to the properspecifications given in Torque Values for Fasteners in the Descriptionand Specifications section.

7. Install the stop collar (76) (if used) per instructions given in Hand LeverPosition for Twin Disc Power Take-Offs in the Installation section ofthis manual.

Note: Some units, such as in the SP314SB Series, use a stopcollar even though the pto is not normally installed with theoperating shaft in the vertical position.

(Proceed to PTO Final Assembly)

173



PTO Final Assembly

Install the clutch in the clutch housing.


1. Set up and support the main housing assembly (44) with attached partson the bench with the input side facing up.

Note: The output end of the shaft must rest securely on a solidsurface.

2. Carefully place the clutch assembly over the clutch shaft while:

A. Aligning the trunnions on the collar with the throwout fork.

B. Aligning the keyways in the hub-and-back plate with the keywayin the clutch shaft.

3. Partially install the hub key (29) in the keyway. Tap the hub-and-backplate with a large, but soft mallet, to seat it on the tapered surface of theclutch shaft.

Be sure the output end of the shaft is resting on a solid surface to absorbthe force through the shaft rather than through the bearing surfaces.

Rotate

throwout fork

to engage

trunnion.

Clutch Shaft (33)

Clutch Key (29)Clutch

Output end of the

shaft MUST rest and

be in contact with a

solid support (Press

bed).

Use several 4” x 4”

blocks or other

means of insuring

the pto does not tip

or fall over.

1234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234123412341234

123123123123123123123123123123123123123123123123123123123123123123123123123123123123123123123123123123

Figure 79. Assemble clutch into Power Take-Off

174



4. Drive the hub key (29) into position slightly below the surface of the hub-and-back plate (4).

Note: Do not use excessive hammer force when installing thekey.

5. Install the hub nut lock washer (3) over the clutch shaft (33), locating itstab in the drilled hole on the hub-and-back plate (4). Install the hub nut(2) and tighten and torque to 40.7 Nm. (30 ft. -lb).

6. Tighten the hub nut an additional 150 - 180 degrees clockwise, thenbend a side of the hub nut lock washer up against a flat on the hub nut.

7. Route the flexible hose assembly (19) clear of all moving parts and pushthe end hose fitting (20) through the hole in the clutch housing.

8. Install the lock washer (21) and jam nut (22) to retain the end fitting (23)in the housing. Torque the capscrews to the proper specifications givenin torque values for Fasteners in the Description and Specificationssection.

Confirm that the hose assembly is not twisted or applying preload tothe collar assembly.

Configurations with stop collar (28) only: (All others skip to step 10)

9. Center the operating shaft so the throwout yoke (54) is not preloadedagainst either side of the collar (28). Put one stop collar (76) on eachend of the operating shaft, snug against the clutch housing (44). Tightenthe screw (77) to secure each stop collar on the shaft.

All Configurations:

10. Install all remaining plugs and external components on the power take-off.

175



Center the clutch plates

11. If not previously done, visually center the friction plates (6) on the clutchand align the teeth. Press down on the collar assembly to lock the platesin place. If necessary, pull the adjustment lock pin to compress the lockpin spring, and rotate the adjusting yoke assembly until the plates arelocked in position when the collar is pressed down.

Note: This is an initial setting to hold the plates in place untilafter the pto is mounted on the engine, so it is imperativethat the teeth be exactly aligned and the plates are exactlycentered on the clutch. The driving ring may be used asan alignment fixture to align the teeth and center the platesrelative to the hub-and-backplate so they are perfectlyaligned when the pto is installed on the engine.

Perfectly

center the clutch in the drive ring.

(This gap is to be exactly equal

all the way around.)

Visually align

Driving Ring

relative to housing

bore.

Figure 80. Using the driving ring as an alignment tool

176



Final assembly and lubrication.

12. Install the power take-off according to instructions in the Installationsection of this manual.

13. Adjust the clutch according to Clutch Adjustment in the Maintenancesection of this manual.

14. Fill the main bearing cavity with grease or oil according to lubricationspecifications in the Maintenance section and Filling the MainBearing Cavity during initial assembly in the Description andSpecifications section of this manual.

15. Lubricate the remainder of the pto according to lubricationspecifications in the Description and Specifications section of thismanual.

16. Place the instruction cover plate (45) in position on the housing andsecure with 2 hex-head cap screws 5/16� - 18 x 1/2� (46). Torque thecapscrews to the proper specifications given in Torque Values forFasteners in the Description and Specifications section.

17. Place the bottom cover plate (62), if used, in position on the housingand secure with 2 hex-head cap screws 5/16� - 18 x 1/2� (74). Torquethe capscrews to the proper specifications given in Torque Values forFasteners in the Description and Specifications section.

18. Install the shaft key (34) and all parts previously removed from the outputend of the clutch shaft.

177

Twin Disc, Incorporated Illustrations


Illustrations

List of Illustrations

The following pages include illustrations that are specific to this model. Theillustrations included are listed below.

Note: Any part numbers listed in the following illustrations arefor reference only. Please refer to your bill of material forpart numbers specific to your model.

� Parts Identification List - SP114, SPE114, SP214, SPE214, SP314,SPE314, SP314SB, RFD214 and RFD314 Series

� Exploded View SP114, SP214 and RFD214 Series Clutches

� Exploded View SP314 and RFD314 Series Clutches

� Exploded View (Configuration A)

� Exploded View (Configuration B)

� Exploded View (Configuration C)

� Exploded View (Configuration D)

� Exploded View (Configuration E)

� Exploded View (Configuration F)

� Exploded View (Configuration G)

� Exploded View (Configuration H)

� Exploded View (Configuration I)

� Exploded View (Configuration J)

� Exploded View (SPE114, SPE214 and SPE314 Series ThrowoutMechanism)

178

Twin Disc, IncorporatedIllustrations


Parts Identification List - SP114, SPE114, SP214, SPE214, SP314,SPE314, SP314SB, RFD214 and RFD314 Series

1 Pilot Bearing 1

2 Nut 1

3 Washer 1

4 Hub-and-back plate 1

5 Ring, drive 1

6 Plate, friction 1,2 or 3

7 Plate, center 1 or 2

8 Plate, pressure 1

9 Lever 4

10 Washer (lever to pressure plate) 4

11 Pin, clevis (lever to pressure plate) 4

12 Pin, cotter (lever to pressure plate) 4

13 Cotter pin (lever to link) 4

14 Pin, clevis (lever to link) 4

15 Link 4

16 Pin, clevis (link to sleeve) 4

17 Clevis pin (link to sleeve) 4

18 Fitting 1

19 Hose 1

20 Fitting 1

21 Washer 1

22 Nut 1

23 Fitting, grease 1

24 Spring, compression 1

25 Pin 1

26 Yoke, adjusting 1

27 Sleeve, sliding 1

28 Collar assembly (collar) 1

29 Ring, snap-external 1

30 Bearing, ball 1

31 Ring, snap-internal 1

32 Key-clutch 1

33 Shaft, clutch 1

34 Key-output 1

35 Capscrew, hex-head 1, 6 or 8

36 Washer 1, 6 or 8

37 Retainer, clip 1

38 Retainer, bearing 1

39 Bearing, cup-front 2

40 Bearing, cone-front (or bearing-qty. 1) 2

41 Bearing, cone-rear (or bearing-qty. 1) 2

42 Bearing, cup-rear 2

43 Bearing 1

44 Housing 1

45 Plate, instruction 1

46 Screw, machine 2

47 Carrier, bearing 1

48 Screw, hex-head 6

49 Washer 6

50 Fitting 1

51 Fitting 1

52 Plug 2 or 3

53 Hand lever assembly 1

54 Throwout yoke 1

55 Shaft, operating 1

56 Key, woodruff 2

57 Fitting (or plug) 2

58 Snap Ring, external 1


60 Sheave Housing 1

61 Dowel Pin 2

62 Plate, Bottom 1

63 Pipe Plug 2

64 Seal Plate (or rear bearing retainer) 1

65 Capscrew 3

66 Washer 3

67 Sleeve, wear-front 1

68 Seal, oil-front 1

69 Sleeve, wear-rear 1

70 Seal, oil-rear 1

71 Plug, pipe 1

72 Breather 1


74 Capscrew 2

75 Snap ring, internal 1

76 Stop Collar 1

77 Screw 1

78 Seal, o-ring 1

79 Snap ring 1

80 Neutral Lock Arm 1

81 Spring, Compression 1

82 Roller Pin 1

83 Retaining ring 1

84 Roller Detent 1

85 Washer 1

86 Hex Head Capscrew 1

87 Hex Head Capscrew 1

88 Detent Locator 1

89 Clevis Pin 1

90 Stop, roller 2

91 Screw, set 2

92 Bearing, Camrol 2

93 Hex Nut 2

94 Plug, Oil Level Check 2

95 Shim AR

96 Fitting 1

Item Description Qty. Item Description Qty.

179



Exploded View (SP114, SP214 and RFD214 Series Clutches)

Note: Typical unit illustrated.

Typical SP114 Series Clutch with Bronze Throwout Collar

Typical SP214 and RFD214 Series Clutch with Ball-Type Throwout Collar

180



Exploded View (SP314 and RFD314 Series Clutches)


Typical SP314 and RFD314 Series Clutch with Ball-type Throwout Collar

181



Exploded View (Configuration A)


182



Exploded View (Configuration B)


183



Exploded View (Configuration C)


184



Exploded View (Configuration D)


185



Exploded View (Configuration E)


186



Exploded View (Configuration F)


187



Exploded View (Configuration G)


188



Exploded View (Configuration H)


189



Exploded View (Configuration I)


190



Exploded View (Configuration J)


191



Exploded View (SPE114, SPE214 and SPE314 Series ThrowoutMechanism)


192



NOTES

193

Twin Disc, Incorporated Engineering Drawings


Engineering Drawings

The engineering drawings included are listed below.

Note: All part numbers listed in the following engineering

drawings are for reference only and illustrate most of the

variations found in the SP114, SPE114, SP214, SPE214,

SP314, SPE314, SP314SB, RFD214 and RFD314

Series PTOs. Please refer to your bill of material for part

numbers specific to your model.

SP114P SP114P101 Sheet 2 of 2 (Configuration A)

SP214P XA7500 (Configuration B)

SP214P SP214P001 Sheet 2 of 2 (Configuration C)

SP214OP X9845 (Configuration D)

SP314IL SP314P121 Sheet 2 of 2 (Configuration E)

SP214IL SP214P121 Sheet 2 of 2 (Configuration F)

SP314OP SP314P123 Sheet 2 of 2 (Configuration G)

SP314SB SP314S106 Sheet 2 of 2 (Configuration H)

SP314SB SP314S117 Sheet 2 of 2 (Configuration I)

RFD214IL TR435469 Sheet 2 of 2 (Configuration J)

SPE214P SP214P003 Sheet 2 of 2

SP314P SP314P001 Sheet 2 of 2

SPE314P SP314P005 Sheet 2 of 2

SP114 Clutch SP114C001 Sheet 2 of 2

Contact your

Authorized Twin Disc Dealer

for the latest BOM and

engineering drawings.

194

Twin Disc, IncorporatedEngineering Drawings


� SPE114 Clutch SP114C008 Sheet 2 of 2

� SP214 Clutch SP214C001 Sheet 2 of 2






216

Twin Disc, IncorporatedEngineering Drawings


56


EC300 Marine Control System Confi guration/Troubleshooting Manual #1020XXX

#1022763

TWIN DISC, INCORPORATED RACINE, WISCONSIN 53403, U.S.A. 262-638-4000/262-638-4482 (FAX) WWW.TWINDISC.COM

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TWIN DISC 1022763_ 01_08_CD

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