PRIME-AIRER SERIES PA6C PumpsPA SERIES PUMPS MR--05244 SAFETY PAGE A -- 1 SAFETY --- SECTION A The...

PUBLICATION NUMBER MR--05244July 27, 2001

Rev. B 10-03-02

Use With: OM--04402

THE GORMAN-RUPP COMPANY D MANSFIELD, OHIOwww.gormanrupp.com

GORMAN-RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

ECopyright by the Gorman-Rupp Company

PRIME-AIRERRRR SERIESPA6C Pumps

The engine exhaust from thisproduct contains chemicalsknown to the State of California tocause cancer, birth defects orother reproductive harm.

MR--05244PA SERIES PUMPS

PAGE I -- 1INTRODUCTION

INTRODUCTION

Thank You for purchasing a Gorman-Rupp Prime-AireR Series priming-assisted pump. Read thismanual carefully to learn how to safely maintainand service your pump. Failure to do so could re-sult in personal injury or damage to the pump.

A set of three manuals accompanies your pump.The Installation/Operation Manual contains essen-tial information on installing and operating thepump, and on making electrical connections. TheParts List Manual provides performance curve(s),a pump model cross-section drawing, and partslist for your pump.

This Maintenance and Repair Manual providestroubleshooting instructions required to properlydiagnose operational problems. Maintenance in-structions within this manual are limited to thepump hydraulic and drive components only. Formaintenance and repair of the engine or air com-pressor, consult the separate literature provided bythe manufacturers.

This pump is a PA SeriesR, priming-assisted cen-trifugal model. The unit is designed for handlingnon-volatile, non-flammable liquids containingspecified entrained solids. For specific service,contact your Gorman-Rupp distributor or the Gor-man-Rupp Company.

As described on the following page, this manualwill alert personnel to known procedures which re-quire special attention, to those which could dam-age equipment, and to those which could be dan-gerous to personnel. However, this manual cannotpossibly anticipate and provide detailed precau-tions for every situation that might occur duringmaintenance of the unit. Therefore, it is the respon-sibility of the owner/maintenance personnel to en-sure that only safe, established maintenance pro-cedures are used, and that any procedures not ad-dressed in this manual are performed only after es-tablishing that neither personal safety nor pump in-tegrity are compromised by such practices.

If there are any questions regarding the pumpwhich are not covered in this manual or in other lit-erature accompanying the unit, please contactyour Gorman-Rupp distributor or the Gorman-Rupp Company:

The Gorman-Rupp CompanyP.O. Box 1217

Mansfield, Ohio 44901--1217Phone: (419) 755--1011

or:Gorman-Rupp of Canada Limited

70 Burwell RoadSt. Thomas, Ontario N5P 3R7

Phone: (519) 631--2870

CONTENTSSAFETY -- SECTION ATROUBLESHOOTING -- SECTION BPUMP MAINTENANCE AND REPAIR -- SECTION C

DRAWINGS AND IDENTIFICATION LISTS PAGES C --- 2 THRU C---11. . . . . . . . . . . . . . . . . . . . . . . . . .PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE C --- 12. . . . . . . . . . . . . . . . . . . . . . . . . . .

Priming Chamber Removal And Disassembly PAGE C --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Discharge Check Valve Removal and Disassembly PAGE C --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover Plate and Wear Ring Removal PAGE C --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Separating Pump End From Power Source PAGE C --- 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Draining Oil From Seal Cavity PAGE C --- 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Loosening Impeller PAGE C --- 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pump Casing Removal PAGE C --- 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Impeller Removal PAGE C --- 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Seal Removal PAGE C --- 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Shaft and Bearing Removal and Disassembly PAGE C --- 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Shaft and Bearing Reassembly and Installation PAGE C --- 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MR--05244 PA SERIES PUMPS

PAGE I -- 2 INTRODUCTION

CONTENTS (Cont’d)Seal Reassembly and Installation PAGE C --- 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Impeller Installation And Adjustment PAGE C --- 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pump Casing Installation PAGE C --- 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Drive Assembly Installation (Engine Driven Units Only) PAGE C --- 19. . . . . . . . . . . . . . . . . . . . . . . .Securing Pump End To Power Source PAGE C --- 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover Plate And Wear Ring Installation PAGE C --- 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Priming Chamber Assembly And Installation PAGE C --- 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Discharge Check Valve Assembly And Installation PAGE C --- 22. . . . . . . . . . . . . . . . . . . . . . . . . . . .Wear Ring Adjustment PAGE C --- 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LUBRICATION PAGE C --- 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Seal Assembly PAGE C --- 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bearings PAGE C --- 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Power Unit PAGE C --- 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RECORDING MODEL ANDSERIAL NUMBERS

Please record the pump model and serial numberin the spaces provided below. Your Gorman-Ruppdistributor needs this information when you requireparts or service.

Pump Model:

Serial Number:

WARRANTY INFORMATION

The warranty provided with your pump is part ofGorman-Rupp’s support program for customerswho operate and maintain their equipment as de-scribed in this and the other accompanying litera-ture. Please note that should the equipment beabused or modified to change its performance be-yond the original factory specifications, the war-ranty will become void and any claim will be de-nied.

The following are used to alert personnel to procedures which require special attention, to those whichcould damage equipment, and to those which could be dangerous to personnel:

Immediate hazards which WILL result insevere personal injury or death. Theseinstructions describe the procedure re-quired and the injury which will resultfrom failure to follow the procedure.

Hazards or unsafe practices whichCOULD result in severe personal injuryor death. These instructions describethe procedure required and the injury

which could result from failure to followthe procedure.

Hazards or unsafe practices which COULDresult in minor personal injury or product orproperty damage. These instructions de-scribe the requirements and the possibledamage which could result from failure tofollow the procedure.

NOTEInstructions to aid in installation, operation, andmaintenance or which clarify a procedure.

PA SERIES PUMPS MR--05244

SAFETY PAGE A -- 1

SAFETY --- SECTION A

The following information appliesthroughout this manual to Gorman-Rupp Prime AireR Series pumps.

This manual will alert personnel toknown procedures which require spe-cial attention, to those which coulddamage equipment, and to those whichcould be dangerous to personnel. How-ever, this manual cannot possibly antici-pate and provide detailed instructionsand precautions for every situation thatmight occur during maintenance of theunit. Therefore, it is the responsibility ofthe owner/maintenance personnel toensure that only safe, established main-tenance procedures are used, and thatany procedures not addressed in thismanual are performed only after estab-lishing that neither personal safety norpump integrity are compromised bysuch practices.

Before attempting to install, operate, orservice this pump, familiarize yourselfwith this manual, and with all other liter-ature shipped with the pump. Unfamil-iarity with all aspects of pump operationcovered in this manual could lead to de-struction of equipment, injury, or deathto personnel.

Before attempting to open or service thepump:

1. Familiarize yourself with this man-ual.

2. Shut down the engine and discon-nect the positive battery cable (en-

gine driven units) or lock out andtag out incoming power to the con-trol box (electric motor drivenunits) and take precautions to en-sure that the pump will remain in-operative.

3. Allow the pump to completely coolif overheated.

4. Check the temperature beforeopening any covers, plates, orplugs.

5. Close the suction and dischargevalves.

6. Vent the pump slowly and cau-tiously.

7. Drain the pump.

This pump is may be used to handle ma-terials which could cause illnessthrough direct exposure or emittedfumes. Wear adequate protective cloth-ing when working on the pump or pip-ing.

Use lifting and moving equipment ingood repair and with adequate capacityto prevent injuries to personnel or dam-age to equipment. Attach lifting equip-ment to the lifting device fitted to thepump. If chains or cable are wrappedaround the pump to lift it, make certainthat they are positioned so as not todamage the pump, and so that the loadwill be balanced. The bail is intended foruse in lifting the pump assembly only.Suction and discharge hoses and pip-ing must be removed from the pump be-fore lifting.


PAGE A -- 2 SAFETY

After the pump has been installed, makecertain that the pump and all piping orhose connections are tight, properlysupported and secure before operation.

Do not remove plates, covers, gauges,pipe plugs, or fittings from an over-heated pump. Vapor pressure within thepump can cause parts being disen-gaged to be ejected with great force. Al-low the pump to completely cool beforeservicing.

Overheated pumps can cause severeburns and injuries, and produce explo-sive fumes. If overheating of the pumpoccurs:

1. Stop the pump immediately.2. Ventilate the area.3. Allow the pump to completely cool.4. Check the temperature and make

sure it is cool before opening anycovers, plates, gauges, or plugs.


6. Refer to instructions in the manu-als accompanying the pump be-fore restarting the pump.

Do not operate the pump without theguards in place over the rotating parts.Exposed rotating parts can catch cloth-

ing, fingers, or tools, causing severe in-jury to personnel.

Use only replacement parts provided orapproved by Gorman-Rupp. Use of non-authorized parts may result in damage tothe equipment and/or injury to personneland will invalidate the warranty.

Make sure the pump is level. Lower jackstands and chock the wheels, if soequipped. Use caution when positioningthe skid-mounted unit to prevent damageto the fuel tank.

Do not operate an internal combustionengine in an explosive atmosphere.When operating an internal combustionengine in an enclosed area, make sureexhaust fumes are piped to the outside.These fumes contain carbon monoxide,a deadly gas that is colorless, tastelessand odorless.

Fuel used by internal combustion en-gines presents an extreme explosionand fire hazard. Make certain that all fuellines are securely connected and free ofleaks. Never refuel a hot or running en-gine. Avoid overfilling the fuel tank. Al-ways use the correct type of fuel.


SAFETY PAGE A -- 3

Never tamper with the governor on en-gine driven units to gain more power.

The governor establishes safe operat-ing limits that should not be exceeded.Refer to the pump Performance Curvefor the maximum continuous operatingspeed.

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP FAILS TOPRIME

Strainer clogged. Check strainer and clean if neces-sary.

Suction lift or discharge head too high. Check piping installation and installbypass line if needed. See INSTAL-LATION.

Leaking or worn seal or pump gasket. Check pump vacuum. Replaceleaking or worn seal or gasket.

Lining of suction hose collapsed. Replace suction hose.

Air leak in suction line. Correct leak.

Discharge check valve contami-nated, damaged, or unable to seat.

Clean or replace check valve.

Air compressor head 180_ out. Consult factory.

Air compressor damaged or belts bro-ken.

Check and repair/replace.

Eductor safety valve leaking. Check and replace safety valve.

Pump speed too slow (engine drivenunits).

Check driver output; consult driveroperation manual.

Eductor clogged. Check and clean eductor.


TROUBLESHOOTING PAGE B -- 1

TROUBLESHOOTING --- SECTION BReview all SAFETY information in Section A.

Before attempting to open or service thepump:1. Familiarize yourself with this manual.2. Shut down the engine and discon-

nect the positive battery cable (en-gine driven units) or lock out and tagout incoming power to the controlbox (electric motor driven units) andtake precautions to ensure that thepump will remain inoperative.

3. Allow the pump to completely cool ifoverheated.

4. Check the temperature and makesure pump is cool before openingany covers, plates, or plugs.


6. Vent the pump slowly and cautiously.7. Drain the pump.


PUMP REQUIRESTOO MUCHPOWER

PUMP CLOGSFREQUENTLY

Impeller or other wearing parts wornor damaged.

Free impeller of debris.Impeller clogged.

Replace worn or damaged parts.Check that impeller is properlycentered and rotates freely.

Discharge head too high.

Measure lift w/vacuum gauge. Re-duce lift and/or friction losses insuction line.

Suction lift too high.

Install bypass line.

Pump speed too slow (engine drivenunits).

Check driver output; consult driveroperation manual.

Pump speed too high (engine drivenunits).

Check driver output.

Discharge head too low.

Dilute if possible.Liquid solution too thick.

Adjust discharge valve.

Pump or jack shaft bearing(s) frozen. Disassemble, check and replacebearing(s) as required..

Liquid solution too thick.

Open discharge valve fully to in-crease flow rate, for engine drivenunits, run engine at maximum gov-erned speed.

Discharge flow too slow.

Dilute if possible.

Suction check valve or foot valveclogged or binding.

Clean valve.

Suction intake not submerged atproper level or sump too small.

Check installation and correctsubmergence as needed.

Discharge check valve clogged. Check and clean check vavle.

Strainer clogged. Check strainer and clean if neces-sary.

Belt or flexible coupling broken. Check and replace as necessary.

Extreme ambient temperature. Reduce pump output.

Fuel filter clogged (engine drivenunits.

Check & replace often in extremeoperating conditions.

Check and replace as required.Fuel contaminated (engine drivenunits.

PUMP STOPS ORFAILS TO DELIVERRATED FLOW ORPRESSURE

Air leak in suction line. Correct leak.Lining of suction hose collapsed. Replace suction hose.

Leaking or worn seal or pump gasket. Check pump vacuum. Replaceleaking or worn seal or gasket.

Eductor clogged. Check and clean eductor.


TROUBLESHOOTINGPAGE B -- 2


TROUBLESHOOTING PAGE B -- 3


BEARINGS RUNTOO HOT

Bearing temperature is high, butwithin limits.

Align drive properly.Drive misaligned.

Check piping installation for propersupport.

Suction and discharge lines not prop-erly supported.

Check for proper type and level oflubricant.

Low or incorrect lubricant.

Check bearing temperature regu-larly to monitor any increase.

Check belt tension. Adjust asrequired.

Excessive tension on drive belt.

EXCESSIVE NOISE Cavitation in pump. Reduce suction lift and/or frictionlosses in suction line. Record vac-uum and pressure gauge readingsand consult local representative orfactory.

Clean out debris; replace damagedparts.

Impeller clogged or damaged.

Secure mounting hardware.Pump or drive not securely mounted.

Locate and eliminate source of airbubble.

Pumping entrained air.

PREVENTIVE MAINTENANCE

Since pump applications are seldom identical, andpump wear is directly affected by such things asthe abrasive qualities, pressure and temperatureof the liquid being pumped, this section is intendedonly to provide general recommendations andpractices for preventive maintenance. Regardlessof the application however, following a routine pre-ventive maintenance schedule will help assuretrouble-free performance and long life from yourGorman-Rupp pump. For specific questions con-cerning your application, contact your Gorman-Rupp distributor or the Gorman-Rupp Company.

Record keeping is an essential component of agood preventive maintenance program. Changesin suction and discharge gauge readings (if so

equipped) between regularly scheduled inspec-tions can indicate problems that can be correctedbefore system damage or catastrophic failure oc-curs. The appearance of wearing parts should alsobe documented at each inspection for comparisonas well. Also, if records indicate that a certain part(such as the seal) fails at approximately the sameduty cycle, the part can be checked and replacedbefore failure occurs, reducing unscheduled downtime.

For new applications, a first inspection of wearingparts at 250 hours will give insight into the wear ratefor your particular application. Subsequent inspec-tions should be performed at the intervals shownon the chart below. Critical applications should beinspected more frequently.


TROUBLESHOOTINGPAGE B -- 4

General Condition (Temperature, UnusualNoises or Vibrations, Cracks, Leaks,Loose Hardware, Etc.) I

Pump Performance (Gauges, Speed, Flow) IBearing Lubrication I RSeal Lubrication (And Packing Adjustment,

If So Equipped) I RV-Belts (If So Equipped) IAir Release Valve Plunger Rod (If So Equipped) I CFront Impeller Clearance (Wear Plate) IRear Impeller Clearance (Seal Plate) ICheck Valve IPressure Relief Valve (If So Equipped) CPump and Driver Alignment IShaft Deflection IBearings IBearing Housing IPiping IDriver Lubrication --- See Mfgr’s Literature

Legend:I = Inspect, Clean, Adjust, Repair or Replace as Necessary

C = CleanR = Replace* Service interval based on an intermittent duty cycle equal to approximately 4000 hours annually.

Adjust schedule as required for lower or higher duty cycles or extreme operating conditions.

Preventive Maintenance Schedule

Item Daily Weekly Monthly Semi-Annually

Annually

Service Interval*


MAINTENANCE & REPAIR PAGE C -- 1

PUMP MAINTENANCE AND REPAIR --- SECTION C

Review all SAFETY information in Section A.

Follow the instructions on all tags, label and de-cals attached to the pump.

Before attempting to install, operate, orservice this pump, familiarize yourselfwith this manual, and with all other liter-ature shipped with the pump. Unfamil-iarity with all aspects of operation ormaintenance could lead to destructionof equipment, injury or death to person-nel.

Use lifting and moving equipment ingood repair and with adequate capacityto prevent injuries to personnel or dam-age to equipment. If slings or chains areused to move the pump or components,make sure that the load is balanced;otherwise serious personal injury ordeath could result. The bail is intendedfor use in lifting the pump assemblyonly. Suction and discharge hoses andpiping must be removed from the pumpbefore lifting.The maintenance and repair instructions in thismanual are keyed to the sectional views and thecorresponding parts identification lists on the fol-lowing pages. Refer to the separate Parts List Man-ual for replacement parts.

This Maintenance and Repair Manual providestroubleshooting instructions required to properlydiagnose operational problems. Maintenance in-structions within this manual are limited to the

pump hydraulic, priming and drive componentsonly. The pump assembly may be close-coupled toeither a factory-supplied or customer-supplied en-gine. Maintenance of engines and factory-suppliedair compressors are detailed in separate literatureprovided by the manufacturer(s).

Check TROUBLESHOOTING, Section B to deter-mine causes and remedies of pump problems.Disassemble the pump only as far as required.

As described in the SAFETY Section, this manualwill alert personnel to known procedures which re-quire special attention, to those which could dam-age equipment, and to those which could be dan-gerous to personnel. However, this manual cannotpossibly anticipate and provide detailed precau-tions for every situation that might occur duringmaintenance of the unit. Therefore, it is the respon-sibility of the owner/maintenance personnel to en-sure that only safe, established shop proceduresare used, and that any procedures not addressedin this manual are performed only after establish-ing that neither personal safety nor pump integrityare compromised by such practices.

Select a suitable location, preferably indoors, toperform required maintenance. All work must beperformed by qualified personnel.

Lifting

Use lifting equipment with a capacity of at leastfive times the weight of the component beinglifted. When lifting the complete unit, the liftingequipment must also be capable of lifting theweight of any options or customer-installed acces-sories. Suction and discharge hoses or pipingmust be removed before attempting to lift thepump.

For the approximate weight of your pump, refer tothe pump specification data sheet or contact yourGorman-Rupp distributor or the Gorman-RuppCompany.

PA SERIES PUMPSMR--05244

MAINTENANCE & REPAIRPAGE C -- 2

SECTION DRAWING

Figure C---1. PA6C60 Pump Model Assembly

ITEM PART NAMENO.

NOTE: Maintenance instructions in this manual are limited to the pump hydrau-lic, priming and drive components only. Maintenance of engines andfactory-supplied air compressors are detailed in separate literature pro-vided by the manufacturer(s).



PA6C60 Pump Model AssemblyPart Identification List

Refer to the separate Parts List Manual for serviceable parts, part numbers and quantities.

1 PUMP END ASSEMBLY2 BAFFLE3 GASKET4 HEX HEAD CAPSCREW5 LOCKWASHER6 CHECK VALVE ASSEMBLY7 HEX HEAD CAPSCREW8 LOCKWASHER9 HEX NUT

10 GASKET11 PRIMING CHAMBER ASSEMBLY12 HEX HEAD CAPSCREW13 HEX NUT



SECTION DRAWING

Figure C---2. 66F60 Pump End Assembly

ITEM PART NAMENO.



66F60 Pump End AssemblyPart Identification List


1 PUMP CASING2 REPAIR ROTATING ASSEMBLY3 HEX HEAD CAPSCREW4 LOCKWASHER5 WEAR RING6 WEAR RING O-RING7 PIPE PLUG8 VENTED PLUG9 HEX HEAD CAPSCREW

10 LOCKWASHER11 ADJUSTING SHIM SET12 PIPE PLUG13 CASING DRAIN PLUG14 BACK COVER PLATE O-RING15 BACK COVER PLATE16 ADJUSTING SCREW17 LOCKING COLLAR18 STUD19 HAND KNOB20 PIPE PLUG21 PIPE PLUG22 HEX HEAD CAPSCREW23 LOCKWASHER24 HEX NUT25 BLIND FLANGE ASSEMBLY26 FLANGE GASKET27 SIGHT GAUGE28 COVER PLATE29 COVER PLATE GASKET30 HEX HEAD CAPSCREW31 LOCKWASHER32 SHIPPING PLUG33 SEAL PLATE O-RING34 BEARING HOUSING O-RING35 HEX HEAD CAPSCREW36 LOCKWASHER



SECTION DRAWING

DRIVE END VIEW

Figure C---3. Repair Rotating Assembly

ITEM PART NAMENO.



Repair Rotating AssemblyPart Identification List


1 IMPELLER2 SEAL ASSEMBLY3 INBOARD BALL BEARING4 BEARING HOUSING5 VENTED PLUG6 AIR VENT7 RED PIPE BUSHING8 OUTBOARD BALL BEARING9 DRIVE FLANGE

10 IMPELLER SHAFT KEY11 IMPELLER SHAFT12 OIL SEAL13 SNAP RING14 HEX HEAD CAPSCREW15 LOCKWASHER16 BEARING HOUSING GASKET17 OIL SEAL18 HEX HEAD CAPSCREW19 LOCKWASHER20 SEAL PLATE21 SOCKET HEAD CAPSCREW22 IMPELLER WASHER23 PIPE PLUG24 PIPE PLUG25 BEARING CAVITY DRAIN PLUG26 SIGHT GAUGE27 INTERMEDIATE GUARDS28 SHAFT SLEEVE O-RING29 IMPELLER ADJ SHIM SET30 SHAFT SLEEVE31 SHIP PLUG32 SHIP PLUG33 ADJ SHIM SET34 BRG HOUSING O-RING35 SEAL PLATE O-RING



SECTION DRAWING

Figure C---4. Drive Assembly (Engine Driven Units)

ITEM PART NAMENO.



Drive Assembly (Engine Driven Units)Part Identification List


1 COUPLING ASSEMBLY2 BUSHING3 ---KEY4 DRIVE FLANGE (REF)5 IMPELLER SHAFT (REF)6 LOCKWASHER7 SOC HD CAPSCREW8 HEX HD CAPSCREW9 LOCKWASHER



SECTION DRAWING

Figure C---5. Peeler Type Priming Valve

ITEM PART NAMENO.



Peeler Type Priming ValvePart Identification List


1 PRIMING CHAMBER LID2 PEELER VALVE NECK3 HEX HEAD CAPSCREW4 LOCKWASHER5 VALVE PLATE GASKET6 VALVE PLATE7 HEX HEAD CAPSCREW8 LOCKWASHER9 LINEAR O-RING

10 HEXHEAD CAPSCREW11 LOCKWASHER12 GUIDE PLATE13 FLAT HEAD CAPSCREW14 LOCKWASHER15 HEX NUT16 VALVE STRAP BRACKET ASSEMBLY17 CLAMP PLATE18 VALVE STRAP19 CHECK VALVE ASSEMBLY20 ---CHECK VALVE21 ---LOCKWASHER22 ---HEX NUT23 ---FLAT WASHER24 ---HEX HEAD CAPSCREW25 ---FLAT WASHER26 ---SEALING WASHER27 STUD28 HEX LOCK NUT29 HEX HEAD CAPSCREW30 LOCKWASHER31 FLAT WASHER32 PRIMING VALVE FLOAT33 PRIMING CHAMBER34 VALVE STRAP PROTECTOR



PUMP AND SEAL DISASSEMBLYAND REASSEMBLY

Review all SAFETY information in Section A.

Follow the instructions on all tags, label and de-cals attached to the pump.

This pump requires little service due to its rugged,minimum-maintenance design. However, if it be-comes necessary to inspect or replace the wearingparts, follow these instructions which are keyed tothe Sectional Views (see Figures C---1, C---2, C---3,C---4 and C---5) and the corresponding Parts Iden-tification Lists. Maintenance and repair instructionsfor the engine and air compressor are covered sep-arately in the specific literature supplied by themanufacturers.

For part numbers and quantities for your specificpump, refer to the separate Parts List manual ac-companying the pump.

Many pump service functions may be performedwithout separating the pump end assembly fromthe power source. However, the following instruc-tions assume complete disassembly of the pumpis required.

Before attempting to service the pump, shut downthe engine and disconnect the positive batterycable (engine driven units) or lock out and tag outincoming power to the control box (electric motordriven units) take precautions to ensure that thepump will remain inoperative. Close all valves in thesuction and discharge lines, allow the pump tocompletely cool, and drain the pump casing.

This manual will alert personnel toknown procedures which require spe-cial attention, to those which coulddamage equipment, and to those whichcould be dangerous to personnel. How-ever, this manual cannot possibly antici-pate and provide detailed instructionsand precautions for every situation thatmight occur during maintenance of theunit. Therefore, it is the responsibility of

the owner/maintenance personnel toensure that only safe, established main-tenance procedures are used, and thatany procedures not addressed in thismanual are performed only after estab-lishing that neither personal safety norpump integrity are compromised bysuch practices.

Before attempting to open or service thepump:

1. Familiarize yourself with this man-ual.

2. Shut down the engine and discon-nect the positive battery cable (en-gine driven units) or lock out andtag out incoming power to the con-trol box (electric motor drivenunits) and take precautions to en-sure that the pump will remain in-operative.

3. Allow the pump to completely coolif overheated.

4. Check the temperature and makesure it is cool before opening anycovers, plates, gauges, or plugs.



7. Drain the pump.

This pump is designed to handle materi-al which could cause illness through di-rect exposure or emitted fumes. Wearadequate protective clothing whenworking on the pump or piping.

Use lifting and moving equipment ingood repair and with adequate capacity



to prevent injuries to personnel or dam-age to equipment. The bail is intendedfor use in lifting the pump assemblyonly. Suction and discharge hoses andpiping must be removed from the pumpbefore lifting. If chains or cables areused to lift pump components, makecertain that they are positioned so asnot to damage the pump, and so that theload will be balanced.

Use only replacement parts provided orapproved by Gorman-Rupp. Use of non-authorized parts may result in damage tothe equipment and/or injury to personneland will invalidate the warranty.

Priming Chamber Removal And Disassembly

(Figure C--1)

Disconnect both the suction piping and the air dis-charge tubing from the priming chamber assembly(11). Support the priming chamber assembly us-ing a sling and a suitable lifting device. Remove thehardware (4 and 5) and separate the primingchamber assembly, baffle (2) and gasket (3) fromthe pump assembly (1).

(Figure C--5)

Remove the hardware (10 and 11) securing thepriming chamber lid (1) to the priming chamber(33). Carefully lift the lid and valve componentsfrom the priming chamber. If the priming valve float(32) is stuck or the check valve assembly (19) isclogged, they can usually be cleaned without fur-ther disassembly.

Inspect the O-ring strip (9) and, if replacement isrequired, remove the gasket and all of the oldadhesive.

To remove the float (32), disconnect the hardware(29, 30 and 31).

To replace the valve strap (18), disengage thehardware (13, 14 and 15) and separate the guideplates (12), clamp plate (17) and valve protector

(34) from the valve strap. Disengage the hardware(27 and 28) and remove the valve strap.

To remove the check valve assembly (19), disen-gage the hardware (3 and 4). Remove the peelervalve neck (2) and check valve assembly.

Inspect the check valve components. If the checkvalve (20) requires replacement, remove the hard-ware (22, 24 and 25) securing the valve weights (23and 26) to the check valve.

It is not necessary to remove the valve plate (6) un-less the gasket (5) requires replacement. To re-move the valve plate, disengage the hardware (7and 8).

Discharge Check Valve Removal andDisassembly

(Figure C--1)

Support the discharge check valve assembly (6)using a sling and a suitable lifting device. Removethe hardware (7, 8 and 9) securing the dischargecheck valve assembly and gasket to the pump as-sembly.

The flapper and gasket are the only serviceableparts of the check valve. If the flapper requires re-placement, remove the hardware securing thecover and gasket. Separate the cover and removethe flapper.

Back Cover Plate and Wear Plate Removal

(Figure C--2)

The wear plate (5) is easily accessible and may beserviced by removing the back cover (15). Beforeattempting to service the pump, remove the pumpcasing drain plug (13) and drain the pump. Cleanand reinstall the drain plug.

Remove the hand knobs (19) and pry the backcover and assembled wear plate from the pumpcasing (1).

NOTEAn alternate method of removing the back coverfrom the pump casing is to remove the hand knobs(19) and two diagonally opposing locking collars(17). Use the adjusting screws (16) to press theback cover out of the pump casing.



Remove and discard the O-rings (6 and14).

Inspect the wear plate (5) and, if replacement is re-quired, remove the hardware (3 and 4) securing itto the back cover plate.

Separating Pump End From Power Source

Further disassembly of the pump requires separat-ing the pump end from the power source. Discon-nect the discharge piping from the pump casing.

Remove the hardware securing the drive flange (9,Figure 3) to the guard (not shown, motor drivenunits only) or bellhousing (engine driven units). Onelectric motor driven units, remove the couplingguard and separate the coupling halves.

Pull the pump end straight away from the powersource. Remove the coupling half from the impellershaft (motor driven units).

(Engine Driven Units, Figure C--4)

As the assemblies separate, the flexible portion ofthe coupling assembly (1) will remain on the shaft.To remove the coupling from the shaft, unscrew thetwo allen head setscrews from the bushing (2).Screw one of the setscrews into the puller hole onthe circumference of the bushing. As the couplingand bushing separate, remove the bushing, andslide the coupling off the shaft. Remove the shaftkey (3).

It is not necessary to remove the outer ring of thecoupling from the engine flywheel unless the cou-pling must be replaced. To remove the ring, disen-gage the hardware (6 and 7) securing it to the fly-wheel.

Move the pump end to a clean, well equipped shoparea for further disassembly.

Draining Oil From Seal Cavity

(Figure C--2)

If any further disassembly is to be performed on thepump, the seal cavity oil must be drained to pre-vent the oil in the seal cavity from escaping as thepump casing is removed.

Position a large (3 gallon [11,4 liter] minimum),clean container under the seal cavity drain plug(12). Remove the drain plug and drain the oil from

the seal cavity into the container. Clean and rein-stall the drain plug. Inspect the oil for water, dirt or acloudy condition which could indicate seal failure.

Loosening Impeller

(Figures C--3 and C--6)

With the pump end separated from the engine, in-sert a block of wood through the pump dischargeand wedge it between the vanes of the impellerand the pump casing to prevent rotation. Removethe impeller capscrew and washer (21 and 22).

Install the shaft key (10) in the shaft keyway. Installa lathe dog on the drive end of the shaft (11) withthe “V” notch positioned over the shaft key.

With the impeller rotation still blocked, see FigureC---6 and use a long piece of heavy bar stock to pryagainst the arm of the lathe dog in a counterclock-wise direction (when facing the drive end of theshaft). Use caution not to damage the shaft or key-way. When the impeller breaks loose, remove thelathe dog, key and wood block.

NOTEDo not remove the impeller until the rotating assem-bly has been removed from the pump casing.

TurnCounterclockwise

Lathe Dog Arm

“V” Notch

Shaft Key

Impeller Shaft

Lathe Dog

Setscrew

HeavyBar Stock

Figure C--6. Loosening Impeller

Pump Casing Removal

(Figure C--2)

Support the pump casing using a suitable hoistand sling, and remove the hardware (9 and 10).



Install four 1/2---13 UNC x 2-inch long jackingscrews in the tapped holes in the bearing housing(4, Figure C---3). Tighten the jacking screws in analternating pattern until the pump casing is pushedoff of the bearing housing. Remove the jackingscrews.

Impeller Removal

(Figure C--3)

To remove the impeller (1), unscrew it in a counter-clockwise direction (when facing the impeller). Usecaution when removing the impeller; tension onthe shaft seal spring will be released as the impelleris unscrewed. Inspect the impeller and replace it ifcracked or badly worn.

Seal Removal


Slide the impeller adjusting shims (29) off the im-peller shaft (11). Tie and tag the shims or measureand record their thickness for ease of reassembly.

Remove the spring centering washer and sealspring. Slide the shaft sleeve (30) and rotating por-tion of the seal (consisting of the bellows, retainer,and rotating element) off the shaft as a unit.

Apply oil to the sleeve and work it up under the rub-ber bellows. Slide the rotating portion of the seal offthe sleeve.

Remove the seal sleeve O-ring (28).

Slide a pair of stiff wires with hooked ends alongthe shaft and hook the stationary seat from theback side. Pull the stationary seat and O-ring fromthe seal plate.

An alternate method of removing the stationaryseal components is to remove the hardware (18and 19) and separate the seal plate from the bear-ing housing (4). Position the seal plate on a flat sur-face with the impeller side down. Use a woodendowel or other suitable tool to press on the backside of the stationary seat until the seat and O-ringcan be removed.

Remove the seal plate O-ring (35).

If no further disassembly is required, refer to SealInstallation.

Shaft and Bearing Removal and Disassembly

(Figure C--3)

When the pump is properly operated and main-tained, the bearing housing should not require dis-assembly. Disassemble the shaft and bearingsonly when there is evidence of wear or damage.

Shaft and bearing disassembly in the fieldis not recommended. These operationsshould be performed only in a properly-e-quipped shop by qualified personnel.

Remove the bearing housing drain plug (24) anddrain the lubricant. Clean and reinstall the drainplug.

Disengage the hardware (14 and 15) and removethe drive flange (9), gasket (16) and oil seal (12).Use a suitably sized dowel to press the oil seal fromthe drive flange.

Place a block of wood against the impeller end ofthe shaft (11) and tap the shaft and assembledbearings from the intermediate. Press the inboardoil seal (17) out of the bearing housing.

Remove the bearing housing O-ring (34).

After removing the shaft and bearings, clean andinspect the bearings in place as follows.

To prevent damage during removal fromthe shaft, it is recommended that bearingsbe cleaned and inspected in place. It isstrongly recommended that the bearingsbe replaced any time the shaft and bear-ings are removed.

Clean the bearing housing, shaft and all compo-nent parts (except the bearings) with a soft clothsoaked in cleaning solvent. Inspect the parts forwear or damage and replace as necessary.



Most cleaning solvents are toxic andflammable. Use them only in a well ven-tilated area free from excessive heat,sparks, and flame. Read and follow allprecautions printed on solvent contain-ers.

Clean the bearings thoroughly in fresh cleaningsolvent. Dry the bearings with filtered compressedair and coat with light oil.

Bearings must be kept free of all dirt andforeign material. Failure to do so will great-ly shorten bearing life. Do not spin drybearings. This may scratch the balls orraces and cause premature bearing fail-ure.

Rotate the bearings by hand to check for rough-ness or binding and inspect the bearing balls. If ro-tation is rough or the bearing balls are discolored,replace the bearings.

The bearing tolerances provide a tight press fitonto the shaft and a snug slip fit into the bearinghousing. Replace the bearings, shaft, or bearinghousing if the proper bearing fit is not achieved.

If bearing replacement is required, remove thesnap ring (13) and use a bearing puller to removethe inboard and outboard bearings (3 and 8) fromthe shaft.

Shaft and Bearing Reassembly and Installation

(Figure C--3)

Inspect the shaft for distortion, nicks or scratches,or for thread damage on the impeller end. Dresssmall nicks and burrs with a fine file or emery cloth.Replace the shaft if defective.

Clean and inspect the bearings as indicated inShaft And Bearing Removal And Disassembly.

To prevent damage during removal fromthe shaft, it is recommended that bearingsbe cleaned and inspected in place. It isstrongly recommended that the bearingsbe replaced any time the shaft and bear-ings are removed.

NOTEThe inboard bearing (3) comes from the manufac-turer with a retaining ring installed on the bearingO.D. This retaining ring must be removed prior toinstallation.

The bearings may be heated to ease installation.An induction heater, hot oil bath, electric oven, orhot plate may be used to heat the bearings. Bear-ings should never be heated with a direct flame ordirectly on a hot plate.

NOTEIf a hot oil bath is used to heat the bearings, both theoil and the container must be absolutely clean. Ifthe oil has been previously used, it must be thor-oughly filtered.

Heat the bearings to a uniform temperature nohigher than 250_F (120_C), and slide the bearingsonto the shaft, one at a time, until they are fullyseated. This should be done quickly, in one con-tinuous motion, to prevent the bearings from cool-ing and sticking on the shaft.

After the bearings have been installed and allowedto cool, check to ensure that they have not movedaway from the shaft shoulders in shrinking. Ifmovement has occurred, use a suitably sizedsleeve and a press to reposition the bearingsagainst the shaft shoulders.

If heating the bearings is not practical, use a suit-ably sized sleeve, and an arbor (or hydraulic) pressto install the bearings on the shaft.

When installing the bearings onto theshaft, never press or hit against the outer



race, balls, or ball cage. Press only on theinner race.

Secure the outboard bearing (8) to the shaft withthe retaining ring (13).

Apply a light coating of oil to the lip of the inboard oilseal (17) and press it into the bearing housing withthe lip positioned as shown in Figure C---3. Pressthe oil seal into the housing until the face is justflush with the machined surface on the housing.

Slide the shaft and assembled bearings into the in-termediate bore until the inboard bearing is fullyseated against the bore shoulder. Use caution notto damage the lip seal on the shaft threads.

When installing the shaft and bearings intothe bearing bore, push against the outerrace. Never hit the balls or ball cage.

Apply a light coating of oil to the lip of the outboardoil seal (12) and press it into the drive flange (9) withthe lip positioned as shown in Figure C---3. Theface of the oil seal should be just flush with theouter face of the drive flange.

Install the drive flange gasket (16) and secure thedrive flange to the bearing housing with the hard-ware (14 and 15). Be careful not to damage the lipof the oil seal (12) on the shaft keyway.

Lubricate a new bearing housing O-ring (34) withgrease and install it in the groove in the bearinghousing.

Lubricate the bearings as indicated in LUBRICA-TION at the end of this section.

Seal Reassembly and Installation


Clean the seal cavity and shaft with a cloth soakedin fresh cleaning solvent.

Most cleaning solvents are toxic andflammable. Use them only in a well ven-tilated area free from excessive heat,sparks, and flame. Read and follow allprecautions printed on solvent contain-ers.

The seal is not normally reused because wear pat-terns on the finished faces cannot be realignedduring reassembly. This could result in prematurefailure. If necessary to reuse an old seal in an emer-gency, carefully wash all metallic parts in freshcleaning solvent and allow to dry thoroughly.

Handle the seal parts with extreme care to preventdamage. Be careful not to contaminate precisionfinished faces; even fingerprints on the faces canshorten seal life. If necessary, clean the faces with anon-oil based solvent and a clean, lint-free tissue.Wipe lightly in a concentric pattern to avoidscratching the faces.

Inspect the seal components for wear, scoring,grooves, and other damage that might cause leak-age. Clean and polish the shaft sleeve, or replace itif there are nicks or cuts on either end. If any com-ponents are worn, replace the complete seal;never mix old and new seal parts.

If a replacement seal is being used, remove it fromthe container and inspect the precision finishedfaces to ensure that they are free of any foreignmatter.

To ease installation of the seal, lubricate the O-rings and bellows with water or a very smallamount of oil, and apply a drop of light lubricatingoil on the finished faces. Assemble the seal as fol-lows, (see Figure C---7).



IMPELLERSHAFT

IMPELLERSHIMS

O-RING

IMPELLER

SPRINGCENTERING

WASHER

SPRING RETAINER

SHAFTSLEEVE

STATIONARYSEAT

BELLOWS

SEAL PLATE

SHAFTSLEEVEO-RING

Figure C--7. Seal Assembly

This seal is not designed for operation attemperatures above 160_F (71_C). Do notuse at higher operating temperatures.

Lubricate the stationary seat O-ring with water orlight oil. Press the stationary seat into the seal plate(20) until fully seated.

Position the seal plate over the shaft and secure itto the bearing housing (4) with the hardware (18and 19). Be careful not to damage the stationaryseat on the shaft threads.

Lubricate a new seal plate O-ring (35) with greaseand install it in the groove in the seal plate.

Lubricate the shaft sleeve O-ring (28) and positionit over the last thread on the impeller shaft. Usecaution not to cut the O-ring on the threads.

Slide the shaft sleeve (30) onto the shaft until theO-ring is fully seated in the undercut. Continue to

press the sleeve onto the shaft until fully seatedagainst the shaft shoulder.

Lubricate the O.D. of the seal sleeve with a smallamount of light oil. Slide the rotating subassembly(consisting of rotating element, bellows and re-tainer), onto the sleeve until the seal faces contact.

Install the seal spring and centering washer. Lubri-cate the seal as indicated in LUBRICATION afterthe impeller is installed.

Impeller Installation And Adjustment

(Figure C--3)

Inspect the impeller (1) and replace it if cracked orbadly worn.

The shaft and impeller threads must becompletely clean before reinstalling the im-peller. Even the slightest amount of dirt onthe threads can cause the impeller to seize



to the shaft, making future removal difficultor impossible without damage to the im-peller or shaft.

Install the same thickness of impeller adjustingshims (29) as previously removed and screw theimpeller assembly onto the shaft until tight.

NOTEAt the slightest sign of binding, immediately backthe impeller off, and check the threads for dirt. Donot try to force the impeller onto the shaft.

A clearance of .025 to .040 inch (0,64 to 1,02 mm)between the impeller and the seal plate is neces-sary for maximum pump efficiency. Measure thisclearance, and add or remove impeller adjustingshims as required.

Secure the impeller to the shaft with the impellerwasher and capscrew (21 and 22).

Pump Casing Installation

(Figure C--2)

Lubricate the rotating assembly O-rings (34 and35, Figure C---3) with a light coating of grease. Usea suitable hoist and sling to slide the pump casing(1) over the rotating assembly.

Install 0.120 inch (3 mm) of shims (11) at eachmounting location and secure the casing to the ro-tating assembly (2) with the hardware (9 and 10).

Drive Assembly Installation (Engine DrivenUnits Only)

(Figure C--4)

Install the shaft key in the shaft keyway. Positionthe flexible portion of the coupling assembly (1) onthe shaft as shown in Figure C---4.

NOTEThe flexible portion of the coupling must be proper-ly positioned on the shaft. The heads of the caps-crews in the center of the coupling must be posi-tioned away from the pump end of the shaft.

Align the keyway in the bushing (2) with the shaftkey, and slide it onto the shaft to the dimension

shown in Figure C---4. Rotate the flexible portion ofthe coupling until the tapped holes for the two set-screws align with those in the bushing, and installthe setscrews.

Make certain that the flexible portion of thecoupling is mounted as shown in FigureC---4. This is critical. If the coupling is notproperly positioned on the shaft, thecoupling parts may not fully engage, or apre-load condition can cause prematurebearing failure.The coupling must be positioned 1.44inches (37 mm) from the end of the shaft.This will allow the two portions of the cou-pling to fully engage when the drive flangeis secured to the engine bellhousing, with-out pre-loading the bearings.

With the flexible portion of the coupling and thebushing properly positioned on the shaft, tightenthe two setscrews in an alternating sequence untilthe bushing and coupling are fully secured. Torquethe setscrews to 14.6 ft. lbs. (175 in. lbs. or 2 m.kg.).

If the complete coupling assembly is being re-placed, apply ‘Loctite Retaining Compound No.242’ or equivalent to the threads of the hardware (6and 7), and secure the outer ring of the coupling tothe engine flywheel by torquing the hardware to 45ft. lbs. (540 in. lbs. or 6,2 m. kg.).

Securing Pump End to Power Source

(Engine Driven Units Only, Figure C--4)

Using a suitable lifting device, position the pumpend assembly and coupling so the flexible portionof the coupling seats inside the outer ring attachedto the engine flywheel.

NOTETo ease installation, lightly lubricate the rubber por-tion of the coupling with a non-petroleum basedlubricant such as vegetable oil or glycerin, or a sili-con-based lubricant such as “WD40” or equivalent.Do not use petroleum-based lubricants, or any oth-



er substance which may soften or otherwise dam-age the rubber.

If removed, install the guards (27, Figure C---3),and secure the drive flange to the engine bellhous-ing with the previously removed hardware (8 and9).

(Electric Motor Driven Units Only, Not Shown)

Install the coupling half on the impeller shaft. Usinga suitable lifting device, position the pump end as-sembly on the base. Align the coupling halves andreinstall the attaching hardware. Install the cou-pling guard and secure the drive flange to theguard with the previously removed hardware.

Wear Plate And Back Cover Plate InstallationAnd Adjustment


If the wear plate (5) was removed for replacement,carefully center it on the back cover (15) and se-cure it with the hardware (3 and 4).

Lubricate the O-rings (6 and 14) with light greaseand install them in the grooves in the wear plateand back cover.

Clearance between the impeller and wear plate isadjusted using four hand knobs (19) and lockingcollars (17). There are 18 detents on the I.D. ofeach locking collar. Indexing the collars one detenton the adjusting screws represents approximately.005 inch (0,13 mm) of wear plate clearance. Therecommended clearance between the wear plateand the impeller is .010 to .020 inch (0,25 to 0,50mm).

USE TWOOPPOSINGHAND NUTSTO PRESSBACK COVERINTO PUMPCASING

USE TWO REMAININGADJUSTING SCREWSAND LOCKING COL-LARS TO SET FACECLEARANCE

INDEX COLLARS 3DETENTS COUNTER-CLOCKWISE, THENTURN CLOCKWISEUNTIL SCREW HOLESALIGN

Figure C--6. Installing and Adjusting BackCover

Screw the four adjusting screws (16) into thetapped holes in the back cover plate until they arejust flush with the machined surface on the backside of the cover plate.

Align the back cover plate over the studs (18) andslide it into the pump casing. Use two hand knobs(19) on diagonally opposing studs to press theback cover into the pump casing until the wearplate just touches the impeller when the shaft isturned by hand. Tighten the hand knobs evenlyto avoid binding.

With the wear plate just touching the impeller, turnthe two free adjusting screws until they engage thepump casing. Position the locking collars over theadjusting screws so the holes in the collars for thelocking screws align approximately with the holesin the cover plate.

Loosen the hand knobs used to press the backcover into the pump casing one full turn.

Pull the collars off the adjusting screws, index themthree detents counterclockwise, and reinstall thecollars on the adjusting screws. Use the collars toturn the adjusting screws clockwise until the holesin the locking collars realign with the tapped screwholes in the back cover plate. Secure the locking



collars to the back cover plate with the hardware(35 and 36). Install the two remaining hand knobssnugly against the adjusting screws.

Remove the first two hand knobs from their studs.Turn the adjusting screws clockwise until they en-gage the pump casing. Install the locking collarsand hardware (35 and 36). Reinstall the handknobs.

Be sure the wear plate does not scrape against theimpeller.

Over time it may be necessary to repeat the adjust-ment process to compensate for normal wear be-tween the impeller and wear plate. When all of theadjustment has been used on the back cover sideof the pump, an additional 0.125 inch (3,2 mm) ofadjustment may be obtained by removing the ro-tating assembly adjusting shims (11).

Allow an installed pump to completely cool beforedraining liquid from the pump casing. Disengagethe hardware (9 and 10), remove the rotating as-sembly adjusting shims, then reinstall the hard-ware securing the rotating assembly to the pumpcasing. Reach through the suction opening andmeasure the clearance between the wear ring andimpeller. Perform the back cover adjustment pro-cedure described above to obtain the proper faceclearance.

Priming Chamber Assembly And Installation

(Figure C--5)

Assemble the valve strap (18), guide plates (12),and protectors (33), and loosely attach them tothe bracket assembly (16) with the hardware (13,14 and 15). The smooth side of the valve strapmust be positioned away from the bracket assem-bly.

Position the priming chamber lid (1) upside downon a flat work surface. Install the preassembledvalve strap and bracket over the studs (27). Allowthe valve strap to fully wrap over the peeler valve toensure a proper seal without any wrinkles in thestrap, and fully tighten the hardware (13, 14, and15).

Position the clamp plate (17) over the studs (27).Apply “Loctite Threadlocker No. 242” or equivalentcompound to the studs, and secure with the locknuts (28).

Lay the lid and preassembled valve strap compo-nents on its side. Apply “Loctite Threadlocker No.242” or equivalent compound to the capscrews(29) and secure the bracket assembly (16) to thefloat (32) with the hardware (29, 30 and 31).

Apply 3-M Scotchgrip Adhesive No. 847” or equiv-alent compound to the linear O-ring (9) and installthe O-ring in the groove in the priming chamber lid(1).

NOTECut the lap joint where the two ends of the O-ring (9)meet at a 45_ angle.

Carefully lower the assembled lid and float into thevalve body (33). Secure the lid to the body with thehardware (10 and 11).

If removed, install the gasket (5) and secure thevalve plate (6) to the lid with the hardware (7 and 8).

If the check valve (19) was disassembled for re-placement, install the sealing washer (26) againstthe head of the capscrew (25). Install the largevalve weight (25) against the sealing washer. Installthe check valve (20) and small valve weight (23),and secure the assembly with the lockwasher andhex nut (21 and 22).

Position the check valve assembly over the holes inthe valve plate (5) with the large weight (25) facingup. Position the valve neck (2) over the check valveassembly and secure with the hardware (3 and 4).

(Figure C--1)

Install the gasket (3) and use a sling and suitablelifting device to position the priming chamber as-sembly against the baffle plate (2) and cover plate(28, Figure C---2). Secure the priming chamber as-sembly with the hardware (4 and 5).

Reconnect both the suction piping and the air dis-charge tubing to the priming chamber assembly.



Discharge Check Valve Assembly AndInstallation

(Figure C--1)

The flapper and gasket are the only serviceableparts of the check valve (6). If the flapper requiresreplacement, remove the hardware securing thecover and gasket. Separate the valve cap and re-place the flapper.

Install the valve cap gasket and secure the cap withthe previously removed hardware.

Install the discharge check valve assembly in thedischarge piping with the hardware (7, 8 and 9).

Wear Ring Adjustment

(Figure C--2)

Pump performance is adversely affected by in-creased clearance between the wear ring (5) andthe impeller. When it becomes necessary to adjustthe clearance, loosen the hand knobs (19) and prythe back cover approximately 1/8 inch (3,2 mm)out of the pump casing.

Disengage the hardware (9 and 10), remove theshims (11) and reinstall the hardware (9 and 10).

Reach through the suction opening and measurethe clearance between the wear ring and impeller.Adjust the wear ring-to-impeller clearance as pre-viously described in Wear Plate And Back CoverPlate Installation And Adjustment.

LUBRICATION

Seal Assembly

(Figure C--2)

Fill the seal cavity through the hole for the ventedplug (8) with SAE No. 30 non-detergent oil. Checkthe oil level regularly at the sight gauge (27) and re-fill as required. When lubricating a dry seal cavity,add approximately approximately 8 U.S. quarts(7,6 liters) of oil to the center of the sight gauge.

NOTEThe white reflector in the sight gauge must be posi-

tioned horizontally to provide proper drainage.

Bearings

(Figure C--3)

The bearing housing was fully lubricated whenshipped from the factory. Check the oil level regu-larly through the sight gauge (26)and maintain it atthe midpoint of the gauge. When lubrication is re-quired, remove the air vent (6) and add SAE No. 30non-detergent oil through the opening. When lubri-cating a dry (overhauled) bearing housing, fill thebearing cavity with approximately 40 ounces (1,2liters) of oil. Clean and reinstall the air vent. Do notover-lubricate. Over-lubrication can cause thebearings to over-heat, resulting in premature bear-ing failure.

NOTEThe white reflector in the sight gauge must be posi-tioned horizontally to provide proper drainage.

Under normal conditions, drain the bearing hous-ing once each year and refill with clean oil. Changethe oil more frequently if the pump is operated con-tinuously or installed in an environment with rapidtemperature change.

Monitor the condition of the bearing lubri-cant regularly for evidence of rust or mois-ture condensation. This is especially im-portant in areas where variable hot andcold temperatures are common.

For cold weather operation, consult the factory or alubricant supplier for the recommended grade ofoil.

Power Unit

Consult the literature supplied with the power unit,or contact your local power unit representative.

For U.S. and International Warranty Information,Please Visit www.grpumps.com/warranty

or call:U.S.: 419−755−1280

International: +1−419−755−1352

For Canadian Warranty Information,Please Visit www.grcanada.com/warranty

or call:519−631−2870

THE GORMAN-RUPP COMPANY � MANSFIELD, OHIOGORMAN-RUPP OF CANADA LIMITED � ST. THOMAS, ONTARIO, CANADA

PRIME-AIRER SERIES PA6C PumpsPA SERIES PUMPS MR--05244 SAFETY PAGE A -- 1 SAFETY --- SECTION A The...

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Transcript of PRIME-AIRER SERIES PA6C PumpsPA SERIES PUMPS MR--05244 SAFETY PAGE A -- 1 SAFETY --- SECTION A The...