10 SERIES PUMPSamtpumps.com/products/PDFManuals/MR-04885.pdf · ventive maintenance schedule will...

PUBLICATION NUMBER MR--04885December 1, 1998Rev. B 12/10/01

Use With: OM--04760

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

ECopyright by the Gorman-Rupp Company

10 SERIES PUMPS12B, 12C, 12D, 13A, 13C And 13E

Electric Motor Or Engine Driven Pumps

with Self Lubricated or Grease Seal

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

MR--0488510 SERIES PUMPS

PAGE I -- 1INTRODUCTION

INTRODUCTION

Thank You for purchasing a Gorman-Rupp 10Series Pump. Read this manual carefully to learnhow to safely maintain and service your pump. Fail-ure to do so could result in personal injury or dam-age to the pump.

A set of three manuals accompanies your pump.The Installation/Operation Manual contains essen-tial information on installing and operating thepump. The Parts List Manual provides a perform-ance curve, a pump model cross-section drawing,and parts list for your pump.

This Maintenance and Repair Manual providestroubleshooting and maintenance instructions re-quired to properly diagnose operational problems,and to service the pump components.

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 during

maintenance of the pump. Therefore, it is the re-sponsibility of the owner/maintenance personnelto ensure that only safe, established maintenanceprocedures are used, and that any procedures notaddressed in this manual are performed only afterestablishing that neither personal safety nor pumpintegrity are compromised by such practices.Pumps and related equipment must be installedand operated according to all national, local and in-dustry standards.

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--1217or:

Gorman-Rupp of Canada Limited70 Burwell Road

St. Thomas, Ontario N5P 3R7

CONTENTS

SAFETY -- SECTION ATROUBLESHOOTING -- SECTION B

PREVENTIVE MAINTENANCE PAGE B --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PUMP MAINTENANCE AND REPAIR -- SECTION C

GENERAL INFORMATION PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lifting PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PARTS IDENTIFICATION LIST:Pump Assembly w/Self Lubricated Seal PAGE C --- 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pump Assembly w/Grease Seal PAGE C --- 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE C --- 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .Impeller Clearances PAGE C --- 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LUBRICATION PAGE C --- 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Self Lubricated Seal Assembly PAGE C --- 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Grease Seal Assembly PAGE C --- 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Power Source PAGE C --- 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MR--04885 10 SERIES PUMPS

PAGE I -- 2 INTRODUCTION

RECORDING MODEL ANDSERIAL NUMBERS

Please record the pump model, serial number, volt-age, and phase in the spaces provided below. YourGorman-Rupp distributor needs this informationwhen you require parts or service.

Pump Model:

Serial Number:

Voltage:

Phase:

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 injurywhich 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.

10 SERIES PUMPS MR--04885

PAGE A -- 1SAFETY

SAFETY - SECTION A

This information applies to 10 Serieselectric motor or engine driven pumps.Refer to the manual accompanying thepower source before attempting to be-gin operation.

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.

This manual contains essential informa-tion on troubleshooting and maintain-ing the pump. In addition to this manual,see the separate literature coveringinstallation and operation, pump parts,and any optional equipment shippedwith the pump.

Before attempting to open or service thepump:

1. Familiarize yourself with this man-ual.

2. Disconnect or shut down the pow-er source and take the necessaryprecautions to ensure that thepump will remain inoperative.

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.

Do not attempt to pump any liquids thepump has not been designed for, andwhich may damage the pump or endan-ger personnel as a result of pump fail-ure. Consult the factory to determinecompatibility between the pump and liq-uid.

Use lifting and moving equipment ingood repair and with adequate capacityto prevent injuries to personnel or dam-age to equipment. Suction and dis-charge hoses and piping must be re-moved from the pump before lifting.

After the pump has been positioned,make certain that the pump and all pip-ing or hose connections are tight, prop-erly supported and secure before oper-ation.

Do not operate the pump against aclosed discharge valve for long periodsof time. If operated against a closed dis-charge valve, pump components will

10 SERIES PUMPSMR--04885

PAGE A -- 2 SAFETY

deteriorate, and the liquid could cometo a boil, build pressure, and cause thepump casing to rupture or explode.

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 cool before servicing.

These pumps may be used to handleproducts which if overheated could pro-duce dangerous fumes. Use extremecaution when venting the pump, orwhen removing covers, plates, plugs, orfittings.

Never run this pump backwards. Be cer-tain that rotation is correct before fullyengaging the pump.

If the pump is used to pump materialswhich could cause serious illness or in-jury through direct exposure or emittedfumes, wear protective clothing, suchas rubber gloves, face mask, and rubberapron, as necessary before disassem-bling the pump or piping.

Do not operate the pump withoutshields and/or guards in place over thedrive shafts, belts, and/or couplings, or

other rotating parts. Exposed rotatingparts can catch clothing, fingers, ortools, causing severe injury to person-nel.

If the pump is powered by an electricmotor, do not operate a non-explosionproof motor in an explosive atmo-sphere. An explosion, which may causesevere personal injury or death, couldresult. Install, connect and operate themotor in accordance with the NationalElectric Code and all local codes. Ifthere is a conflict between the instruc-tions in the manual accompanying theunit and the National Electric Code orapplicable local code, the National orLocal code shall take precedence. Allelectrical equipment supplied with thepump conforms to applicable federalregulations and national codes in effecton the date of manufacture.

If the pump is electric motor driven, theelectrical power used to operate thispump is high enough to cause injury ordeath. Obtain the services of a qualifiedelectrician to troubleshoot, test and/orservice the electrical components ofthis pump.

If the pump is powered by an internalcombustion engine, do not operate inan explosive atmosphere. When operat-ing internal combustion engines in anenclosed area, make certain that ex-haust fumes are piped to the outside.These fumes contain carbon monoxide,a deadly gas that is colorless, tasteless,and odorless.


PAGE A -- 3SAFETY

Fuel used by internal combustion en-gines presents an extreme explosionand fire hazard. Make certain that allfuel lines are securely connected andfree of leaks. Never refuel a hot or run-ning engine. Avoid overfilling the fueltank. Always use the correct type of fuel.

Never tamper with the engine governorto gain more power. The governor esta-blishes safe operating limits that shouldnot be exceeded. The maximum contin-uous operating speed for the pump isshown on the performance curve (seethe Parts List Manual).

Pumps and related equipment must be in-stalled and operated according to all na-tional, local and industry standards.


TROUBLESHOOTING PAGE B -- 1

TROUBLESHOOTING --- SECTION B

Review all SAFETY information in Section A.

Before attempting to open or service thepump:1. Familiarize yourself with this manual.2. Disconnect or shut down the power

source and take the necessary pre-cautions to ensure that the pump willremain inoperative.

3. Allow the pump to completely cool ifoverheated.

4. Check the temperature before open-ing any covers, plates, or plugs.


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

Table B-1 Troubleshooting Chart

TROUBLE POSSIBLE CAUSE PROBABLE REMEDYPUMP FAILS TO PRIME Not enough liquid in casing.

Suction check valve contaminated ordamaged.

Air leak in suction line.

Lining of suction hose collapsed.

Leaking or worn seal or pump gas-ket.

Suction lift or discharge head toohigh.

Strainer clogged.

Add liquid to casing. See PRIMING.

Clean or replace check valve.

Correct leak.

Replace suction hose.

Check pump vacuum. Replace leak-ing or worn seal or gasket.

Check piping installation and installbypass line if needed. See INSTAL-LATION.

Check strainer and clean if neces-sary.

PUMP STOPS OR FAILSTO DELIVER RATEDFLOW OR PRESSURE

Air leak in suction line.

Lining of suction hose collapsed.

Suction intake not submerged atproper level or sump too small.

Correct leak.

Replace suction hose.

Check installation and correct sub-mergence as needed.


TROUBLESHOOTINGPAGE B -- 2

Table B-1 Troubleshooting Chart (continued)

TROUBLE POSSIBLE CAUSE PROBABLE REMEDYPUMP STOPS OR FAILSTO DELIVER RATEDFLOW OR PRESSURE(cont.)

Impeller or other wearing parts wornor damaged.

Leaking or worn seal or pump gas-ket.

Impeller clogged.

Pump speed too slow.

Pump running backwards (electricmotor driven models).

Suction lift or discharge head toohigh.

Replace worn or damaged parts.Check that impeller is properly cen-tered and rotates freely.

Check pump vacuum. Replace leak-ing or worn seal or gasket.

Free impeller of debris.

Check driver output; check belts orcouplings for slippage.

Check direction of rotation. Correct3-phase wiring by interchanging anytwo motor leads at control box. (SeePump Rotation in the Installationand Operations Manual.

Check piping installation and installbypass line if needed. See INSTAL-LATION in the Installation and Op-erations manual.

PUMP REQUIRES TOOMUCH POWER

Pump speed too high.

Discharge head too low.

Liquid solution too thick.

Check driver output, check thatsheaves or couplings are correctlysized.

Adjust discharge valve.

Dilute if possible.

PUMP CLOGSFREQUENTLY

Discharge flow too slow.

Suction check valve or foot valveclogged or binding.

Open discharge valve filly to in-crease flow rate, and run powersource at maximum governedspeed.

Clean valve.

EXCESSIVE NOISE Cavitation in pump.

Pumping entrained air.

Pump or drive not securelymounted.

Impeller clogged or damaged.

Reduce suction lift and/or frictionlosses in suction line. Record vacu-um and pressure gauge readingsand consult local representative orfactory.

Locate and eliminate source of airbubble.

Secure mounting hardware.

Clean out debris; replace damagedparts.


TROUBLESHOOTING PAGE B -- 3

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.

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 intermittant 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*


PAGE C -- 1MAINTENANCE AND REPAIR

PUMP MAINTENANCE AND REPAIR --- SECTION C

GENERAL INFORMATION


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. Suction and dis-charge hoses and piping must be re-moved from the pump before lifting.

The maintenance and repair instructions in thismanual are keyed to the sectional view, FigureC---1 or C---2 and the corresponding parts identifi-cation list. Refer to the separate Parts List Manualfor replacement parts.

Select a suitable location, preferably indoors, toperform required maintenance.

This Maintenance and Repair Manual providestroubleshooting and maintenance instructions re-quired to properly diagnose operational problems,and to service the pump components. Mainte-nance instructions within this manual are limited tothe pump hydraulic, priming and drive compo-nents only.

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.

Lifting

Use lifting equipment with a capacity of at leastfive times the weight of the pump, including theweight of any options or customer-installed acces-sories. Discharge hose or piping must be removedbefore attempting to lift the pump.

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


MAINTENANCE AND REPAIRPAGE C -- 2

SECTION DRAWING

12D, 13E BACKCOVER DETAIL

13C CHECKVALVE DETAIL

12D SEAL AREA DETAIL

Figure C---1. Typical 12D, 13A, 13C And 13E Pump End Assemblyw/Self Lubricated Seal

ITEMNO. PART NAME

ITEMNO. PART NAME



Typical 12D, 13A, 13C And 13E Pump End Assembly w/Self Lubricated SealParts Identification List

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

1 PUMP CASING2 IMPELLER3 SEAL ASSEMBLY4 PIPE PLUG5 FILL PLUG ASSEMBLY6 NAME PLATE7 DRIVE SCREW8 CASING GASKET SET9 STUD

10 HEX NUT11 SHAFT EXTENSION12 SHAFT SLEEVE13 INTERMEDIATE ASSEMBLY14 WEAR PLATE ASSEMBLY15 HEX NUT16 LOCK NUT17 BACK COVER GASKET18 CASING DRAIN PLUG19 BACK COVER PLATE ASSEMBLY20 ---PIPE PLUG (IF REQUIRED)21 ---BACK COVER

22 ---WARNING PLATE23 ---DRIVE SCREW24 CLAMP BAR25 CLAMP BAR SCREW26 HEX HEAD CAPSCREW27 LOCKWASHER28 SUCTION FLANGE29 PIPE PLUG (IF REQUIRED)30 CHECK VALVE ASSEMBLY31 ---ROUND HEAD MACHINE SCREW32 ---SMALL VALVE WEIGHT33 ---LOCKWASHER34 ---CHECK VALVE GASKET35 ---LARGE VALVE WEIGHT ASSEMBLY36 IMPELLER ADJUSTING SHIMS37 SPRING CENTERING WASHER OR

SPRING RETAINER38 SLINGER RING (IF REQUIRED)39 FLAT WASHER40 WING NUT41 STUD



SECTION DRAWING

13C CHECKVALVE DETAIL

12D BACKCOVER DETAIL

Figure C---2. Typical 12B, 12C, 12D, 13A And 13C Pump End Assemblyw/Grease Seal

ITEMNO. PART NAME

ITEMNO. PART NAME



Typical 12B, 12C, 12D,13A and 13C Pump End Assembly w/Grease SealParts Identification List

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

1 PUMP CASING2 IMPELLER3 SEAL ASSEMBLY4 PIPE PLUG5 FILL PLUG ASSEMBLY6 NAME PLATE7 DRIVE SCREW8 CASING GASKET SET9 STUD

10 HEX NUT11 SHAFT EXTENSION12 SEAL LINER13 INTERMEDIATE ASSEMBLY14 WEAR PLATE ASSEMBLY15 HEX NUT16 LOCK NUT17 BACK COVER GASKET18 CASING DRAIN PLUG19 BACK COVER PLATE ASSEMBLY20 ---PIPE PLUG (IF REQUIRED)21 ---BACK COVER22 ---WARNING PLATE23 ---DRIVE SCREW24 CLAMP BAR

25 CLAMP BAR SCREW26 HEX HEAD CAPSCREW27 LOCKWASHER28 SUCTION FLANGE29 PIPE PLUG30 CHECK VALVE ASSEMBLY31 ---ROUND HEAD MACHINE SCREW32 ---SMALL VALVE WEIGHT33 ---LOCKWASHER34 ---CHECK VALVE GASKET35 ---LARGE VALVE WEIGHT ASSEMBLY36 IMPELLER ADJUSTING SHIMS37 NOT REQUIRED38 NOT REQUIRED39 FLAT WASHER40 WING NUT OR MACHINE BOLT41 STUD42 SUCT FLANGE GSKT (IF REQUIRED)43 CHECK VALVE PIN (IF REQUIRED)44 DISCHARGE ELBOW (IF REQUIRED)45 GREASE CUP46 PIPE COUPLING47 PIPE NIPPLE



PUMP AND SEAL DISASSEMBLYAND REASSEMBLY


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 Figure C---1 or C---2) andthe accompanying parts list. Unless otherwisespecified, the instructions apply to either FigureC---1 or Figure C---2.

Before attempting to service the pump, disconnector lock out the power source and take the neces-sary precautions to ensure that the pump will re-main inoperative. Close all valves in the suctionand discharge lines.

For power source disassembly and repair, consultthe literature supplied with the power source, orcontact your local source representative.

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 open or service thepump:

1. Familiarize yourself with this man-ual.

2. Disconnect or shut down the pow-er source and take the necessaryprecautions to ensure that thepump will remain inoperative.

3. Allow the pump to completely coolif overheated.

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


6. Vent the pump slowly and cau-tiously.

7. Drain the pump.

If the pump is designed to pump materi-als which could cause serious illness orinjury through direct exposure oremitted fumes, wear protective cloth-ing, such as rubber gloves, face mask,and rubber apron, as necessary beforedisassembling the pump or piping.

Suction Check Valve Removal and Disassembly

(Figure C--1 or Figure C--2, Models 12B, 12C,12D, 13A, And 13E)

Before attempting to service the pump, remove thepump casing drain plug (18) and drain the pump.Clean and reinstall the drain plug.

To service the suction check valve assembly (30),remove the suction piping. Remove the hardware(26 and 27) securing the suction flange (28) andcheck valve assembly (30) to the pump casing (1).Separate the check valve assembly from the suc-tion flange.

Inspect the check valve parts for wear or damage.If replacement is required, remove the hardware



(31 and 33), and separate the check valve gasket(34) and weights (32 and 35).

Suction Check Valve Removal

(Figure C--2, Model 13C)

If the check valve assembly (30) is to be serviced,remove the hardware (26 and 27) securing the suc-tion flange (28). Remove the check valve pin (43)and pull the complete assembly from the suctionflange. Remove the suction flange gasket (42).

NOTEFurther disassembly of the check valve is not re-quired since it must be replaced as a complete unit.Individual parts are not sold separately.

If no further disassembly is required, see SuctionCheck Valve Installation.

Back Cover Removal

(Models 12B, 12C, 13A And 13C)

The wear plate assembly (14) is easily accessibleand may be serviced by removing the back cover(19). Loosen the clamp bar screw (25) and removethe clamp bar (24). Pull the back cover and wearplate from the pump casing. Remove the back cov-er gasket (17). Clean the mating surfaces of theback cover plate and pump casing.

Inspect the wear plate and replace it if badlyscoredor worn. To remove the wear plate, disengage thehardware (15 and 16) securing it to the back cover.

If no further disassembly is required, see BackCover Installation.

Back Cover Removal

(Models 12D And 13E)

The wear plate (14) can be serviced after the backcover assembly (19) has been removed.

Remove the wing nuts and washers (39 and 40) se-curing the back cover to the casing. Pull the backcover and wear plate from the pump casing (1).

Inspect the wear plate for excessive wear or scor-ing. If replacement is required, remove the hard-ware (15 and 16) securing it to the back cover.

Remove the cover plate gasket (17) and clean themating surfaces.

If no further disassembly is required, see BackCover Installation.

Pump Casing Removal

To service the impeller or seal assembly, discon-nect the discharge piping. Remove the hardwaresecuring the pump casing to the base. Tie and tagany leveling shims used under the pump mountingfeet to ease reassembly.

Disengage the hardware securing the pump cas-ing to the hoisting bail. Support the pump casingusing a suitable hoist and sling, and remove thenuts (10) securing the pump casing to the inter-mediate (13). Separate the pump casing and gas-ket set (8) from the intermediate by pulling the cas-ing straight away. Clean the mating surfaces of theintermediate and pump casing. Tie and tag thegaskets, or measure and record their thickness forease of reassembly.

Impeller Removal

If the pump is equipped with a grease seal, turn thecross arm on the automatic lubricating grease cup(45, Figure C---2) clockwise until it rest against thecover (see Figure C---5) before attempting to re-move the impeller (2). This will prevent the greasein the cup from escaping when the impeller is re-moved.

To loosen the impeller (2), tap the vanes of the im-peller in a counterclockwise direction (when facingthe impeller) with a block of wood or a soft-facedmallet. Unscrew the impeller using caution; ten-sion on the seal spring will be released as the im-peller is unscrewed.

Inspect the impeller and replace it if cracked orbadly worn. Slide the impeller adjusting shims (36)off the impeller shaft. Tie and tag the shims or mea-sure and record their thickness for ease of reas-sembly.



Self Lubricated Seal Removal And Disassembly

(Figures C--1 and C--3)

Remove the spring centering washer or spring re-tainer (37) and seal spring. Slide the shaft sleeve(12) and rotating portion of the seal off the shaft asa single unit. Apply oil to the sleeve and work it upunder the bellows. Slide the rotating portion of theseal off the shaft. Use a pair of stiff wires withhooked ends to remove the assembled stationaryseat from the intermediate (13).

NOTEAn alternate method of removing the seal assemblyis to remove the hardware securing the intermedi-ate to the power source and slide the intermediateand seal assembly off the shaft as a single unit.Place the intermediate on a flat surface with the im-peller side down. Use a suitable sized dowel topress the seal components from the intermediate.

Remove the slinger ring (38). If required, removethe intermediate as described above.

If no further disassembly is required, see Self Lu-bricated Seal Installation.

Grease Seal Removal and Disassembly


To remove the seal assembly (3), remove thegrease cup and piping (45, 46 and 47) from the in-termediate.

Carefully remove the outer stationary and rotatingseal elements, packing ring, stationary washer,seal spring, and spacer sleeve from the intermedi-ate. Using two stiff wires with hooked ends, removethe inboard stationary washer, packing ring andstationary and rotating seal elements.

NOTEThe seal assembly may also be removed by disen-gaging the hardware securing the intermediate tothe power source and sliding the intermediate andseal assembly off the shaft as a single unit. Use adowel of suitable size to press the seal componentsfrom the intermediate.

Inspect the seal liner (12) for wear or grooveswhich could cause leakage or damage to the sealpacking rings. The seal liner is a press fit in the in-termediate and does not normally require replace-ment. If replacement is necessary, separate the in-termediate from the power source as describedabove.

If the seal liner needs replaced, see Seal Reas-sembly and Installation.

If no further disassembly is required, see GreaseSeal Reassembly and Installation.

Self Lubricated Seal Installation

(Figures C-1 and C--3)

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.

Inspect the shaft (11) for damage. Small scratchesor nicks may be removed with a fine file or emerycloth. If excessive wear exists, the shaft will have tobe replaced. (Refer to the power source servicemanual).

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 (12), or re-place it if there are nicks or cuts on either end. If anycomponents 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 as-semblied stationary seat and shaft sleeve withwater or a very small amount of oil, and apply adrop of light lubricating oil on the finished faces.Assemble the seal as follows, (see Figure C---3).

ROTATING ELEMENT

SLEEVE

STATIONARYSEAT

SHIMS

SPRING CENTERINGWASHER OR SPRING

RETAINER

DRIVE BAND

SLINGER RINGBELLOWS

O-RING IF EQUIPPEDSPRING

Figure C--3. Self Lubricated Seal Assembly

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

If the intermediate (13) was removed, position theintermediate over the shaft and secure it to thepower source with the previously removed hard-ware.

If used, install the slinger ring (38) on the shaft.

Press the assembled stationary seat into the inter-mediate until the stationary seat bottoms againstthe intermediate bore. A push tube cut from a

length of plastic pipe would aid this installation.The I.D. of the pipe should be approximately thesame diameter as the I.D. of the seal spring.

Slide the rotating subassembly (consisting of therotating element, retainer and bellows) onto the lu-bricated shaft sleeve until the rotating element isjust flush with the end of the sleeve with the cham-fered I.D. Slide the sleeve and rotating subassem-bly onto the shaft until the seal faces contact. Con-tinue to push the sleeve through the seal until it bot-toms against the shaft shoulder.

Install the seal spring and spring centering washeror spring retainer (37).

Grease Seal Reassembly and Installation


Before installing the seal, inspect the bore of theseal liner (12) for wear or grooves which mightcause leakage or damage to the seal packingrings. If the seal liner must be replaced, remove theintermediate as described in Seal Removal AndDisassembly, and position it on the bed of an ar-bor (or hydraulic) press. Use a new sleeve to forcethe old one out. After the new liner is properly in-stalled, drill a 1/4-inch diameter hole through theliner to permit the flow of lubricant to the seal as-sembly. Be careful to center the drill in thethreaded grease piping hole and not damage thethreads. Deburr the hole from the inside of the sealliner after drilling.

Inspect the shaft for damage. Small scratches ornicks may be removed with a fine file or emerycloth. If excessive wear exists, the shaft will have tobe replaced. (Refer to the engine or motor servicemanual).

Position the intermediate (13) against the powersource and secure it in place using the previouslyremoved hardware.

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 seal liner, or replace it ifthere are nicks or cuts on either end. If any compo-nents are worn, replace the complete seal; nevermix 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.

SHAFT

SEALLINER

IMPELLER

IMPELLERSHIMS

STATIONARY WASHERSROTATINGELEMENT

SPRING SEAL PLATE

PACKINGRINGSPACER

SLEEVE

STATIONARYELEMENT

Figure C--4. Grease Seal Assembly

To ease installation of the seal, lubricate the pack-ing rings and seal liner with water or a very smallamount of oil, and apply a drop of light lubricating

oil on the finished faces. Assemble the seal as fol-lows, (see Figure C---4).

This seal is not designed for operation attemperatures above 110_F (43_C). Do notuse at higher operating temperatures.

The position for the inboard rotating element is de-termined by the machining of the impeller shaft atthe shoulder where the element seats. If there is aradius on the shaft, position the inboard elementwith the I.D. chamfer toward the shaft shoulder. Ifthe shaft is undercut at the shoulder, position theinboard element with the I.D. chamfer away fromthe shoulder.

Subassemble the inboard stationary element,packing ring and seal washer. Press this unit intothe lubricated seal liner until the seal faces contact.A push tube cut from a length of plastic pipe wouldaid this installation. The I.D. of the tube should beapproximately the same as the the I.D. of the sealspring.

Install the spacer sleeve and seal spring.

Subassemble the outboard stationary element,packing ring and seal washer. Press this unit intothe lubricated seal liner.

Install the outboard rotating element with thechamfered side toward the impeller end of theshaft.

Install the grease cup and the piping (45, 46 and47) in the intermediate.

After the impeller has been installed, lubricate theseal as indicated in LUBRICATION at the end ofthis section.

NOTESome smoking and leakage may occur after instal-ling a new seal assembly. This should stop after thepump has run a while and the lapped seal faceshave seated in.

Impeller Installation And Adjustment

Inspect the impeller, and replace it if cracked orbadly worn. Install the same thickness of impeller



adjusting shims (36) as previously removed, andscrew the impeller onto the shaft until tight.

For maximum pump efficiency, a specific clear-ance is required between the impeller and the in-termediate (see Table C---1). Add or remove impel-ler shims until this clearance is reached.

NOTEBe sure the intermediate is tight against the powersource while measuring this clearance.

Table C--1. Impeller Clearances

PumpImpeller toWear Plate

Clearance

Impeller toIntermediate

12B .020 to .040 .008 to .01512C .020 to .040 .008 to .01512D .015 to .040 .010 to .02013A .020 to .040 .008 to .01513C .020 to .040 .010 to .02013E .020 to .040 .008 to .015

Pump Casing Installation

Install the same thickness of pump casing gaskets(8) as previously removed, and secure the pumpcasing (1) to the intermediate (13) with the nuts(10). Do not fully tighten the nuts at this time.

NOTEThe back cover assembly must be in place to adjustthe impeller face clearance.

For maximum pump efficiency, a specific clear-ance is required between the wear plate (14) andthe impeller (see Table C---1). Install the back coverassembly (19) and set this clearance by adding orremoving gaskets in the pump casing gasket set(8).

NOTEAn alternate method of adjusting this clearance is toreach through the discharge port with a feelergauge and measure the gap. Add or subtract pumpcasing gaskets accordingly.

After the face clearance has been set, tighten thenuts (10) securing the pump casing to the inter-mediate.

Back Cover Installation

(Figure C--1 or C--2)

If the wear plate (14) was removed for replace-ment, center the wear plate against the cover plate(19) and secure it using the attaching hardware (15and 16). The wear plate must be concentric to pre-vent binding when the back cover is installed.

NOTETo ease future disassembly, apply a film of greaseor ‘Never-Seez’ on the back cover shoulder, or anysurface that contacts the pump casing. This actionwill reduce rust and scale build-up.

Clean any scale or debris from the contacting sur-faces on the pump casing that might prevent agood seal with the back cover. Replace the backcover gasket (41) and slide the back cover assem-bly (34) into the pump casing. Be sure the wearplate does not bind against the impeller.

(Models 12B, 12C, 13A And 13C)

Secure the back cover assembly by installing theclamp bar (24) and tightening the clamp bar screw(25). Do not over-tighten the clamp bar screw; itshould be just tight enough to ensure a good sealat the back cover shoulder.

(Models 12D And 13E)

Secure the back cover assembly with the hard-ware (39 and 40). Do not over tighten the wingnuts; they should be just tight enough to ensure agood seal at the back cover shoulder.

Suction Check Valve Installation

(Models 12B, 12C, 12D, 13A And 13E)

Inspect the check valve components and replaceas required. Subassemble the check valve weights(32 and 35) and check valve gasket (34) using theattaching hardware (31 and 33).

Position the check valve assembly (30) in the suc-tion port with the large weight toward the inside ofthe pump casing. Install the suction flange (28) and



secure with the hardware (26 and 27). Check theoperation of the check valve to ensure proper seat-ing and free movement.

(Figure C--2, Model 13C)

Inspect the check valve assembly (19), and re-place it if badly worn.

NOTEThe check valve assembly must be replaced as acomplete unit. Individual parts are not sold sepa-rately.

Position the check valve adaptor in the mountingslot of the suction flange (28). Align the adaptorwith the flange hole, and secure the assembly withthe check valve pin (43). Install the suction flangeand suction flange gasket (42), and secure with thehardware (26 and 27). Check the operation of thecheck valve to ensure proper seating and freemovement.

Final Pump Assembly

Secure the pump to the base with the previously re-moved hardware. Be sure to reinstall any levelingshims used under the pump mounting feet.

Be sure the pump and power source are securelymounted to the base.

Install the suction and discharge lines. Make cer-tain that all piping connections are tight, properlysupported and secure. Open all the valves in thesuction and discharge lines.

Be sure the pump and power source have beenproperly lubricated, see LUBRICATION.

Remove the fill plug assembly (24) and fill thepump casing with clean liquid. Reinstall the fill plugand tighten it.

Refer to OPERATION in the Installation And Op-eration manual before putting the pump back intoservice.

LUBRICATION

Self Lubricated Seal Assembly

(Figure C--1)

The seal assembly is lubricated by the medium be-ing pumped, or by a flow of fresh liquid from an ex-ternal source. Flushing liquid may be taken fromthe pump discharge and supplied through auxilia-ry piping.

When handling abrasive or tacky liquids, supplyfresh lubricating liquid from an external source. Besure the liquid supplied to the seal is compatiblewith the liquid being pumped, and that its flow iscontrolled to prevent dilution. If flushing is re-quired, contact the factory.

Grease Lubricated Seal Assembly

(Figure C--2)

Fill the grease cup (12) through the grease fittingwith No. 2 lithium base grease until grease es-capes from the relief hole. Turn the grease cup armcounterclockwise until it is at the top of the stem;this will release the spring to apply grease to theseal (see Figure C---5).



GREASEFITTING CROSS

ARM

POSITIONWHENEMPTY

POSITIONFOR

FILLING

POSITIONWHENIN USE

RELIEFHOLE

NOTE:When installing a new grease cup, lubricatethe cup as indicated on the installation tagfurnished with the grease cup.

Figure C--5. Automatic Lubricating Grease Cup

NOTESome smoking and leakage may occur after instal-ling a new seal assembly. This should stop after thepump has run a while and the lapped seal faceshave seated in.

Power Source

Consult the literature supplied with the powersource, or contact your local power source repre-sentative.

THE GORMAN-RUPP COMPANY F MANSFIELD, OHIOGORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

July 18, 1979

WARRANTY

Pumping units manufactured by The Gorman-Rupp Company,Mansfield, Ohio are guaranteed to be free from defects in mate-rial and workmanship for one year from date of shipment fromfactory in Mansfield, Ohio. The obligation under this Warranty,statutory or otherwise, is limited to replacement or repair atMansfield, Ohio factory or at a point designated by Gorman-Rupp, of such part as shall appear to us upon inspection at suchpoint, to have been defective in material or workmanship.

This Warranty does not obligate The Gorman-Rupp Company tobear the cost of labor or transportation charges in connectionwith replacement or repair of defective parts; nor shall it apply toa pump upon which repairs or alterations have been made un-less authorized by Gorman-Rupp.

No warranty is made in respect to engines, motors, or trade ac-cessories, such being subject to warranties of their respectivemanufacturers.

In Submersible Pumps, pump and motor are integral and Sub-mersibles are warranted as a unit. Since motor is subject to animportant degree upon quality and performance of electricalcontrols, unit warranty is valid only when controls have beenspecified and provided by Gorman-Rupp.

No express implied or statutory warranty, other than herein setforth is made or authorized to be made by Gorman-Rupp.

In no event shall The Gorman-Rupp Company be liable for con-sequential damages or contingent liabilities arising out of the fail-ure of any Gorman-Rupp pump or parts thereof to operate prop-erly.

THE GORMAN-RUPP COMPANY

Mansfield, Ohio

NOTE: In Canada, all above references to “The Gorman-RuppCompany, Mansfield, Ohio” is understood to mean “Gorman-Rupp of Canada Limited, St. Thomas, Ontario.”

ECopyright by the Gorman-Rupp Company

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