IH-S-3088+

IInntteerr nnaattiioonnaallHHaarr vveesstteerr

Service Manualfor FARMALL

3088, 3288, 3688& 3488 HydroVolume 1 of 2

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF INTERNATIONAL HARVESTER OR IT’S SUCCESSORS. INTERNATIONAL HARVESTER AND IT’S SUCCESSORS

ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.

Serv

ice

Man

ual

, ,

General Contents

PageSafe Work Rules, Metric Conversion Tables, Standard Torque

Data for Hydraulic Tubes and Fittings, Standard TorqueData for Nuts and Bolts, Special Service Tools Required IV-XIII

III

Section 1

AlC AND TRACTOR SPLITS

Contents

Air Conditioning System """""""""""""""""""""""""""""""""""" .. """""""""""""""""

Recommended Torque Values for AIC SAE 450 Flare Connections "."""""""" .. """"""""""

Special Torques """"""""""""""""""""""",,"""""""""""""""""""""""""""""""" II " " " "

Air Conditioning Components """"""""" II " " " " " " " " " " " " " " " " " " " " " " " " II " " " " " " " " II " " " " " "

Recirculation Rod and Door Removal """"""""""""""" .. """""""""""""""""""""" .. " II " " "

Windshield Wiper Motor" " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " II " " " " " " " " " " " " " " " "

Door Striker Adjustment """" " " " " " " " " " " " " " " " " " " " " " " " " II " " " " " " " " " " " " " II " " " " " " .. " .. " "

Speed Transmission Split with Control Center on Rear Frame II " " " " " " " " " " " " " " " " " " " " " " " " "

Rear Frame Split with Control Center on Speed Transmission" " " " " " " " " " " " " " " " " " " " " " " "" "

Isomounts" " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " . " .. " " " " " " " " " "

1-1

Page I1-2

1-3

1-4

1-5

1-8

1-10

1-11

1-12

1-21

1-29

Section 2

FRONT AXLE, BOLSTER AND WHEELS

Contents

Torque Specifications

Front AxleRemoval Ii II" .

Installation .

Page

2-2 •2-32-5

BolsterRemoval . . . . . . . . . . . . .. . .. . . . . . . . . . .. .. . . . . .. . .. . . . . . . .. . .. . ... . . . . . . . . . . . . . . . . . .. .. 2-6Installation ..... II • • • • • • • • • • • • .. • • • • • • • • • • • • • • • .. • • • .. • • .. • • • .. .. • • • • • • • • • • • • • • •• 2-9

Spindle and Hub ." II • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • .. • • • • • • • • •• 2-10Removal " . D ••••• II • II " II ••• II II • II II II • II II II II • II II II •• II •• II " • II II " " II II ••• II II " " II II II 2-11Installation ." II ••• D ••• II II II .... II. II II " II •• II II • " II II II. II •••• II II II II II II • II II •• II •• II II •• II • II II 2-12

Adjusting Toe-!n II •• II • II II ••• II II •••••• II •••• II II II II • II • II ••• II II • II II ••• II • '" ••••• II • II •• II •••• II 2-14

All Wheel Drive Axle II. II II II II • II II II II II • II II •• II. II II II II .... II II .. II II •• II •• II. II II II • II • II • II II II II II II II II • II II 2-15

2-1

NeedleBearing

5. Use a soft round drift with a flatface about. 7937 mm (. 008 in. ) smallerthan the needle bearing and drive thecross downward until the bottom needlebearing can be removed.

1. Timing mark on spline end of shaft2. Timing mark on yoke assembly

2-50

]Jriti,'·----·········································· ,,,,"'••+',,,

Nh:enh~

leafing

6. Turn the slip joint over and driveagainst the exposed journal to remove theremaining needle bearing.

7. Lift out the bearing cross.

8. Wash the needle bearings andjournals in cleaning solvent. Coat theparts with a light coat of oil if they areto be reused and wrap in oil proof paperuntil needed for reassembly.

9. Disassemble the opposite end ofthe drive line in the same manner.

10. For reassembly, reverse theorder of disassembly.

For proper shaft timing, the arrowmust align with the mark at the end ofthe spline shaft. This will keep the driveyokes in line and balanced during opera­tion.

IMPORTANT: Upon installation thor­oughly grease the shaft at the threegrease fittings. This must be done toprevent bearing failure and it also keepsthe shaft in balance.

Section 3

STEERING

Contents

Specifications " II •• " ••••••••••••••••••••••••••••••••••••••••••

Steering Hand Pump ... Ii ••••••• " •••••••••••••• " •••••• " ••••••••••••••••••••••••

General II • • • • • • • • • • • • • • • • • • • • • • • • • • II • II • • • • • • • • • • • II • • • • • • • • • • • • •• II • • •

Principles of Operation II •••••••••••••••••••••••••••••

Control Valve II " • II •••••••••••••••••• II •••••••

Metering Section II ••••••••••••••••••••••••••• II ••••••••••••••••••••••••

Rotor Operation in the" Metering Element II •• " ••••••••• II •••• II ••••• II •••••••••

Manual Steering Operation " " " .

Steering Wheel and Shaft . II • " •••••••••••••••• II •••• " ••••••••• II ••••••••••• II •• " •••

Removal II •••••••••••••• " •••••••••••••••••••••••••• " •••••••••••••• " ••

Installation II ••••••••• II •••••••••• "" ••• II II •••••••••

Steering Wheel Tube II •••••••••• II • " •••••••• II •• " " •••••••••• II. " II • II ••••

Removal " II • II •••••••••••••••• II ••••••• " ••

Installation " " .

Page

3-2

3-4

III3-4

3-43-53-53-63-6

3-73-73-7

3-83-83-9

Steering Hand Pump

Removal II. II • • • ••••••• " ••••• " •••• " " •••••••••••••••••••• " " " " ••• " II • " "" 3-10Disassembly · II • • • • • • " •• " •••• " • " " II " • " ••••• " • II " • " ••• II II " ••• " ••• " " ••• " • II •• " • "II 3-10Inspection and Repair .. " .. " .... "" ... " ... II •••• " •• " " ..... " •••• " II •• II II " " " • " " II " • •• 3-16

Reassembly " .. " ... " .. " .. ".""."" II • II " • " •• " ••• " " II • " " II II " • " •••••• " " ••••• II • " • ". 3-16Installation .. ". II "" •••••••• II." •• "." ••• " •••• "" ••••••• "" •••••••••• """. II •• II •• " 3-20

Power Steering Cylinder · · .... " .. " ... II • " " II • " • " •••••• " •• " ••• " " • " ••••••••••• II ••• " 3-21Removal II " II • • ••••••• " • " •••• " •••• " ••••••••• II ••••••• " •• " •••••••••• " • II 3-21

Disassembly " .. " '" " " " " " " II " " " " " • " " " " •• " • " " II II " " " " " " " " " '" " " " "" 3-21Inspection and Repair II"""""""""""""""""""."""""""""" II " " " " " " " " " • " " " " " " " II '" " "" 3-23

Reassembly "" II " II " " " " " " " " " " • " " " " " " " " " " " " " " " " " II " II " II " " " " " II " " • II " " " II " " " " " " " " "" 3-23Installation " " " II " " " " II '" " " " '" II " " " " " " " " II " " " " II " " " " " " " " " " " " " " " " " " " " " " " " '" " " " II " " " "" 3-25

3-1

Section 4·

ENGINE

Contents

Page

Clutch Split 0; • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 4-2Splitting the Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-2Recoupling the Tractor 4-6

Engine Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-7

4-1

I

Section 5

FUEL SYSTEM

Contents

Page

Main Fuel TankRemoval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-2Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-2

Auxiliary Fuel TankRemoval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-3Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-4Auxiliary Fuel Tank Fitting Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-4

5-1

•

Section 7

COOLING SYSTEM

Contents

Page

Forward Air Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-3

Radiator AssemblyRemoval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-5Radiator Fan Drive Installation 7-6

7-1

I

Section 8

CLUTCH AND FLYWHEEL

Contents

Page

Clutch Specifications ". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8-2

Clutch Assembly ., 5 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 8-3

Clutch Booster Assembly II • • • • • • • • • • • • • • •• 8-4

Clutch Linkage Adjustment II • • • •• 8-6Clutch Booster Adjustment ~ 8-6Engine Clutch Adjustment J • I ••••••••••••••••••••••••••••••••••••• II • • • •• 8-8Neutral Starting Switch and Transn .•ssion

Brake Switch Adjustment 8-8Tractors Equipped with IITA" Adjustment II •• II ••• II • II • II • II • II II • II •• II •••••• II 8-8

NOTE: Refer to GSS-1281-K Clutches

8-1

I

Section 9

TRANSMISSION

Contents

Special Torques II '" II II " " II .. II II " II Il " B " " .. "

Power Flow Gear Drive II II II " II II " II II II ..

Torque Amplifier Solenoid II II II .. II " • II " ..

Transmission Brake " " II " II .. II " ..

Speed Transmission Disassembly .. II 1\ • " II B B .. II II " B D " II II ..

Mainshaft 51 " .. " It II II 51 B B II ..

Countershaft II II II B II II III II II III II II • " ••

Torque Amplifier Overhaul· III .. II • III I. " III Il • II II II II • 11 II .

Speed Transmission Reassembly Il • II .. 13 II II II ..

Cou ntershaft "" "' B II II II II " " " II II II ..

Mainshaft II II " " " .. " " II II II .. II II .. II II It " ..

IPTO Drive Shaft " ., "' " . II " .. " " " ..

IPTO Front Bearing Set-Up Procedure II II " " II II .. II II ..

Range Transmission Disassembly II .. " II 51 " " 51 " II " " II II II .. " .. II " " II ..

Differential II II II II .. " " " II " II .. " " II " " .. II ..

Mainshaft II " II II II " II II " " B II " B II

Reverse Idler Gear II II II II II II II II " OJ OJ " ..

Countershaft B II " II II " B II Ii " II II ..

Range Transmission Reassembly " II " " .. II II II .. II II II .. II II II II

Countershaft II II II II II II II .. " II ..

Countershaft Bearing Set-Up II II II II " II .. " II Ii .. " .. II .. II 11 II ..

Reverse Gear Bearing Installation II " Ii " II .. II Ii "

Power Take-Off Driven Shaft " " .. " II " .. Ii .. II OJ II II " " .. Il II II B ..

Mainshaft (Range Transmission) .. " II II II " " II II " .. II '" II " ..

9-1

Page

9-2

9-3

9-4

9-5

9-6

9-6

9-8

9-10

9-23

9-239-24

9-26

9-29

I9-31

9-319-32

9-34

9-35

9-37

9-37

9-39

9-409-42

9-42

Page

Park Lock Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ii • • • • • • • • • • • • • • •• 9-46Removal 9-46Disassembly II ••••••••••••••••••••••••••• 9-50Reassembly II • • •• 9-52Installation 9-53

Park Lock Adjustment II II • .. .. .. • • .. .. • • •• 9-55Neutral Interlock Adjustment " II 9-55Park Lock Switch Adjustment 9-55

Speed Transmission Linkage II • • • • • • • .. • • • .. • .. .. • • • • • • .. • .. • • .. • • • • • • • • • • • •• 9-56Speed Transmission Linkage Adjustment 9-57

Range Transmission Linkage 9-58Range Transmission Linkage Adjustment 9-59

Clutch Housing Repair Procedure 9-60

Power Command Switch Adjustment .. .. . . . . .. . . . . . .. .. . .. .. . . .. . .. .. . .. . .. .. .. .. . .. .. . . .. .. .. .. . .. . . . .. 9-62

Power Train and Hydraulic System Clean UpProcedure After Major Overhaul 9-63

Understanding the Lube Warning Light at Low Idle II II Ii 9-65

Adjustments (Hydrostatic) II • • .. .. .. • .. .. .. .. .. • .. .. .. .. .. .. • .. .. .. .. .. 9-66Directional Control (F&R) Cable IIA" Adjustment 9-66Speed Ratio Control Cable liB" Adjustment II II" 9-66S-R Lever Adjustment II " II II 9-67Servo Linkage Adjustment 9-68Servo Control Adjustment II .. .. .. 9-68Foot-I nch-Valve Adjustment II 9-70Range Transmission Linkage Adjustment 9-71

Special Torques

Speed TransmissionCountershaft nut torque (use 11-107 Socket

Torque AmplifierLock up carrier capscrew torque •Clutch carrier capscrew torque

406 N· m (300 ft. lbs.)

26-28 N· m (19-21 ft. lbs.)94-103 N· m (69-76 ft. lbs.)

Range TransmissionMainshaft bearing cage capscrew torque . • . . . . . . . . . .Mainshaft retaining nut torque . • . . . . . . . . . • . . . . e

9-2

e 115 N· m (85 ft. Ibs.)136 N· m (100 ft. lbs.)

Section 10

REAR FRAME ASSEMBLY

Contents Page

Specifications II • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 10-1

Special Torques II •••••••••••••••••••••••••••••• 10-1

Differential Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-2

Pinion and Differential· Bearing Setup " 10-4

Pinion Mounting Distance Setup 10-5

Differential Bearing Pre-Load 10-6

Backlash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-7

Differential Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-9

Rear Frame Cover 10-17

Draft Control Cylinder 10-20

Rockshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10-25

Torsion Bar 10-27

Specifications

1426 to 2068 kPa (230 to 300 psi)Differential lock pressure ....

Special Torques

Differential case bolts nuts • • • • • • • •Range transmission mainshaft cage bolts ..••Range transmission main-shaft nutDifferential bearing retainers • • • • • • •

N·m

152115135100

FT. LBS.

11285

10073

I

Outer dual wheel hub clampInside bolts . . . . . . . . . . 271 200Outside bolts • • • • . . . . 575 425

Wedge lock wheel bolt. . . . . . . . . . . . . . 542 400

10-1

Section 11 -

REAR AXLE ASSEMBLY

Contents

Page

Special Torques II II II II II II II II II II II II II II " II II II II II II II II II II II II II " II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II 11-1

Rear Axle and Bull Pinion Shaft II II II .. " II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II II .. II 11-2Bull Pinion Shaft Bearing Adjustment II II II II II II II II II II II II II II II II II II II II II II II II II II II II II .. II II II II II .. II II II II II II II 11-8Axle Outer Bearing Pre-Load Adjustment II II II .. II .. II .. " " .. II II II • .. .. .. .. .. • .. .. .. .. .. .. .. .. 11-8

High Clear Drop Housing II II II II II II II II II II II II II II II II II II .. II II II II II II II II II II II II II .... II II II II II II II II II II II II II .. II II II II II II II 11-9

Special Torques

Differential bearing retainer • • .Rear axle carrier • . . . . . . .

Rear wheel hub clampInside bolts • . . • . .Outside bolts . . • .

Wedge lock wheel bolts . . . • .Rim clamp boltsRear wheel to hub mounting bolts (loose hub wheel) . . • .Dual wheel disc to hub bolts. • . . . • • . . . . • • •

11-1

99 N· m (73 ft. Ibs.)230 N· m (170 ft. lbs.)

271 N· m (200 ft. lbs.)576 N·m (425 ft. Ibs.)

542 N. m (400 ft. lbs.)345 N· m (255 ft. Ibs.)406 N· m (300 ft. lbs.)159 N· m (140 ft. lbs.)

I

Section 12

BRAKES

Contents

Page

Specifications """"""""""""""""""""""""""""""""""""""""""""""""""""""""""" II " ..

Power Hydraulic Multi-Disc Brakes """""""""""""""""""""""" II " " " " " " " " " " " " " II II " " " " " "

Power Brakes (Engine Running) " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " "Manual Brakes (Engine Stopped) """"""""""""""""""""""""""""""""""""""""""""""

Removal and Disassembly """""""""""""""" II " " " " " " " " " " " " " " " " " " " " " " " " " II " " " " " " " "

Inspection """""""""" II " " " " " " " " " " " " " " " " " " " " • " " • " " " • " • " " " • " " ••••• " • " " " II • " " " •

Reassembly and Installation" " " " . " . " ... " . " " " " " " . " " " II • " " " " " • " " II • " " • " " " " " " ••• II " "

Bleeding the Brakes ."." II " ••• " • " " " .. " " " " " " ••• " " • " • " " " " II " •• " " " " " " " " • " " • " " II " " " " " •

Brake Wear Switch Adjustment ... " . " " " " .. " " II " " " " " " •••• " " " " " ... " " • " • " " " " " • " ••• " " • "

Brake Valve Service .. ".""""""""""" II • " " • " " " " " • " " " • " " " " • " • " " • " " " • " ••• " " " • " II " " " "

Brake Pedal and Linkage Adjustment """."""""""".".""." .. "".".""".""."."."""""""

Height Adjustment """"""""."""""""""""""".""""""""""" II •• " " " " " " " " " • " " " " " " " "

Brake Pedal Travel """""""""""""""" II " " • " " • II " " " •• II • " " " " • " " " " • " " • " " II " " .. " " " " " " •

Brake Linkage Adjustment" " " " " " " " " " " II " " " " " " " " ••• " " " • " " " " • " " " " " " II " " " " " " " " " • " "

Specifications

12-1

12-212-212-412-412-612-7

12-8

12-9

12-10

12-1212-1212-1312-13

IBrake diameter - inches .

Brake pressure - psi3088, 3288 and 36883488. • ••••••.

12-1

••••••• 279.4 mm (11 inch)

• 1310 to 1930 kPa (190 to 280 psi)•• 2689 to 3000 kPa (390 to 435 psi)

Section 13

INDE.PENDENT POWER TAKE-OFF

Contents

Page

Specifications II ••••••••• II ••• 111 •••••••••••• ". 13-1

IPTO Assembly II •••••••••••••••••••••••••••••••••••••• II •••••••••••• II •••••••••• 13-2

IPTO Introduction " II •••••••••••••••••••••••••••••• II " • II ••••• II 13-3

Removing the IPTO from the Tractor" " /I ••••••••••• /I •••••••••••• " •••••• I! 13-3

Servicing IPTO Components. II ••••••• II II ••••••••••••••••••••••••••••••••••••••• II II. 13-5IPTOPump 13-5IPTO Clutch Pack Assembly " /I ••••• II" •• II ••••••• " •• II.". "" ••••••• 13-11IPTO Cover and Valve Housing II •••••••••••••••• II ••••••••••••••••••••••• " 13-17

Installing the IPTO on the Tractor II •••••• " ••••••••••••••••••••••• II •••••••••••••••• 13-22

IPTO Control Valve .. " II ••••••••••••••••••••••• 13.,22

IPTO Cable Installation and Adjustment 13-23

Adjusting IPTO Pressure .. II •••••••••••••••••• , ••••••••••• II ••• I! II •• 13-25

Specifications

IPTO Pressure 0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 210 ± 5 psi

13-1

I

Section 14

HYDRAULIC SYSTEM

Contents

Page

Basic Hydraulic System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14-3

Load and Position Control Hitch and Auxiliary Hydrau~ic

System (3088 and 3288 Tractors) .

System Relief Valve (3088 and 3288 Tractors) .

Hydraulic Supercharge System (3088 and 3288 Tractors) .

Power Priority Hydraulics (3488 and 3688 Tractors) .

Power Priority Draft Control Cylinder andAuxiliary and Motor Valves (3488 and 3688 Tractors) .

Multiple Control Valve (3088, 3288 and 3688 Tractors) .

Multiple Control Valve (3488 Tractors) .

Hitch Pump (3088 and 3288 Tractors) .

Power Priority Hitch Pump and Compensator (3488 and 3688 Tractors) .

Start Up Procedure PPH Pump (3488 and 3688 Tractors) .

Unloading Valve (3088 and 3288 Tractors) .

Motor Priority Valve (3488 and 3688 Tractors) .

Auxiliary "alve Service (All Models) __ ..

Flow Control Valve (3488 and 3688 Tractors) .

Alternating Check Valve ~ _ .

Hydraulic Seat D •••••••••••••••••••••••••••

Recharging Hydraulic Seat Accumulator .

Coupler Service ..... II " ••••••••••••••••••••••••••••••••••••••••••••••••••••••

14-1

14-13

14-22

14~23I

14-24

14-30

14-42

14-51

14-56

14-63

14-69

14-70

14-74

14-78

14-83

14-84

14-86 I14-90

14-92

Sump Check Valve Seat Service II ..

Checks and Adjustments II II ..

Lever Friction3088 and 3288 Tractors ..3488 and 3688 Tractors II II II .. II ..

Drop Check Valve Neutral (3088 and 3288 Tractors) II ..

Drop Poppet Cage (3488 and 3688 Tractors) ..

Position Control Lever II II

Hitch Height II .. II II II .. II .. II ..

Action Control Valve (3088 and 3288 Tractors) ..

D!op Control Valve (3488 and 3688 Tractors) II II II II ..

Load (Draft) Control Lever II .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

~nternal Sensing Arm II ..

Variable Raise Rate (3488 and 3688 Tractors) II II II II .. II ..

Position Control Accuracy II II II II II II II ..

Checking Raise and Drop Time II II II

14-2

14-97

14-98

14-9814-99

14-100

14-101

14-103

14-104

14-105

14-106

14-107

14-108

14-109

14-112

MCV equipped with TA

MCV without TA

14-43

1. Brake lube check valve2. Drive selector valve

assembly3. Multiple control valve body4. Union plugs5. Oil cooler by-pass valve6. Safety valve assembly7. Flow control orifice8. Flow control valve9. Lubrication regulator

valve assembly10. Transmission oil

pressure switch11. Clutch dump valve12. Pressure regulator valve

assembly

1. Brake lube check valve2. Multiple control valve body3. (Oil cooler) by-pass valve4. Safety valve assembly5. Flow control orifice6. Flow control valve7. Lubrication regulator

valve assembly8. Pressure reguiator

valve assembly

Section 15

TESTING HYDRAULIC SYSTEM

Contents

Page

Specifications 15-3

Test No.1 (3488 and 3688 Tractors)Coupler Flow Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-6

Test No.2 (3488 and 3688 Tractors)Hitch Raise Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-9Interpreting Test Results 15-10

Hydraulic System Analyzer (14-557) Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-11

Test No.3 (3488 and 3688 Tractors)Pump -Flow Rate and Cut-Off Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-15

Test No.4 (3488 and 3688 Tractors)Pump Standby Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-16

Test No.5 (3488 and 3688 Tractors)Pump Differential Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-16

Hydraulic System Problems - Pump O. K.Problem in Motor and Auxiliary Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-17Problem in Motor Circuit Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-17Problem in Auxiliary or Hitch Circuit 15-17

Test No.6 (3488 and 3688 Tractors)Main System Cushion Relief Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-18

Test No. 7 (3488 and 3688 Tractors)Motor and Auxiliary Valve Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-19

Test No.8 (3488 and 3688 Tractors)Auxiliary Valve Unlatching Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-20

Troubleshooting Charts (3488 and 3688 Tractors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-22

15-1

II

Test No.9 (All Models)MCV Pump Flow Test (3088, 3288 and 3688 Tractors) 15-29MCV Pump Flow Test (3488 Tractor) 15-31

Test No. 10 (All Models,)Steering Pump Flow Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-32

Test No. 11 (All Models.)Brake Pressure 15-33Troubleshooting Brakes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-34

Test No. 12 (3088, 3288 and 3688 Tractors)Testing Lube, TA and Direct Drive Pressures 15-36Lube, TA and Direct Drive Test Evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-38

Test No. 13 Hitch Pump Test (3088 and 3288 Tractors)

Test No. 14 (3088 and 3288 Tractors)Auxiliary Valve Unlatching Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-44

Test No. 15 (3488 and 3688 Tractors)Thermal By-Pass Test. . .. 15-46

Troubleshooting Charts (3088 and 3288 Tractors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15-47

Determining the Cause for "Hiccups" i 5-51

15-2