New INSTALLATION, OPERATION, AND MAINTENANCE MANUAL · 2020. 4. 24. · GHC SERIES OM--04352 SAFETY...

OM---04352---01September 2, 1996

TVXY

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

Copyright by the Gorman-Rupp Company

INSTALLATION, OPERATION,AND MAINTENANCE MANUAL

ROTARY GEAR PUMPS

MODELS

GHC SERIESIRON AND STEEL

PUMPS

TABLE OF CONTENTS

i

INTRODUCTION PAGE I --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY --- SECTION A PAGE A --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION --- SECTION B PAGE B --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GENERAL INFORMATION PAGE B---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PUMP MODEL DESIGNATION PAGE B---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PREINSTALLATION INSPECTION PAGE B---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STORAGE PAGE B---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Flushing PAGE B---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP INSTALLATION PAGE B---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lifting PAGE B---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Positioning The Pump PAGE B---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mounting PAGE B---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Piping PAGE B---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Gauges PAGE B---4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Strainers PAGE B---4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sealing PAGE B---4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Valves PAGE B---4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Barrier Liquids for Dual Seals PAGE B---4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ALIGNMENT PAGE B---5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Coupled Drives PAGE B---5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V-Belt Drives PAGE B---5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

V-BELT TENSIONING PAGE B---6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .General Rules of Tensioning PAGE B---6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tensioning Measurement PAGE B---6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL CONNECTIONS PAGE B---7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATION --- SECTION C PAGE C --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP OPERATION PAGE C---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PRE-OPERATION PAGE C---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Before Starting The Pump PAGE C---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Checking Pump Rotation PAGE C---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTING PAGE C---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OPERATION PAGE C---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Liquid Temperature PAGE C---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Overheating PAGE C---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Checking Gauges PAGE C---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Strainer Check PAGE C---2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Leakage PAGE C---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PRESSURE RELIEF VALVE ADJUSTMENT PAGE C---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cracking Pressure PAGE C---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Complete By-Pass Pressure PAGE C---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STOPPING PAGE C---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING --- SECTION D PAGE D --- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PREVENTIVE MAINTENANCE PAGE D---4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP MAINTENANCE AND REPAIR --- SECTION E PAGE E --- 1. . . . . . . . . . . . . . . . .

PARTS KEY:Typical GHC Pump Model PAGE E---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS(continued)

ii

ASSEMBLED GHC PUMP MODEL ILLUSTRATIONS PAGE E---4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PUMP DISASSEMBLY PAGE E---5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pressure Relief Valve (10) PAGE E---5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rotor Adjusting Sleeve (07) PAGE E---6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Coverplate Kit (11) PAGE E---6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Head/Idler Kit (01) PAGE E---6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Seal Removal (05) PAGE E---7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rotor/Shaft Removal (08) PAGE E---7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Foot Bracket Kit (06) PAGE E---7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Backhead Kit Removal (06) PAGE E---7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Housing Assembly (04) PAGE E---7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP REASSEMBLY PAGE E---8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cleaning and Inspection PAGE E---8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bushing Preparation PAGE E---8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Housing Assembly (04) PAGE E---8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Backhead Kit (06) PAGE E---9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rotor/Shaft Assembly (03) PAGE E---9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Seal Installation (05) PAGE E---9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Head/Idler Kit PAGE E---9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Coverplate Kit (11) PAGE E---10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Foot Bracket Kit (08) PAGE E---10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rotor Adjusting Sleeve (07) PAGE E---10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SETTING END CLEARANCE PAGE E---10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RELIEF VALVE DISASSEMBLY PAGE E---11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RELIEF VALVE REASSEMBLY PAGE E---12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Relief Valve Installation (10) PAGE E---13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SEAL APPENDIX --- SECTION F PAGE F---1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standard Friction Drive And Optional 60A, 60B And 61J Mechanical Seals PAGE F---1. . . . . . . . . . . . .Standard Lip (And Optional 65C) Seal PAGE F---3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Positive Drive (Option 60D) And Metal Bellows (Option 60F, 61K) Seals PAGE F---5. . . . . . . . . . . . . . . .Double Friction Drive (Options 60J And 60K) Seals PAGE F---8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cartridge (Options 60M, 60N, 60P And 61L) Seals PAGE F---11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Balanced Seal (Option 60Q) PAGE F---13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Friction Drive Mechanical Seal With Flush (Options 60T And 60U) PAGE F---15. . . . . . . . . . . . . . . . . . .

OM--04352GHC SERIES

PAGE I--1INTRODUCTION

INTRODUCTION

Thank You for purchasing a Gorman-Rupp RotaryGear Pump. This manual is designed to help youachieve the best performance and longest life fromyour Gorman-Rupp Rotary Gear pump. Read thismanual carefully to learn how to safely install, op-erate and repair your pump. Failure to do so couldresult in personal injury or damage to the pump.

This manual will alert personnel to known proce-dures which require special attention, to thosewhich could damage equipment, and to thosewhich could be dangerous to personnel. However,this manual cannot possibly provide detailed in-structions and precautions for each specific ap-plication or for every situation that might occur dur-ing maintenance of the unit. Therefore, it is the re-sponsibility of the owner, installer and/or mainte-nance personnel to ensure that applications and/or maintenance procedures not addressed in thismanual are performed only after establishing thatneither personal safety nor pump integrity arecompromised by such applications or procedures.

In addition to this manual, a separate Parts List isshippedwith the pump. Refer to theParts Listwhenordering parts.

If your pump is furnished with a drive unit, refer tothe drive unit manufacturer’s installation and oper-ation instructions in the literature accompanyingthe pump.

These pumps can transfer a wide range of light,medium, and heavy viscosity liquids, dependingon design and components. Some models arenot recommended for use with water; otherswhen fitted with specific options, may be usedwith water; consult the factory.

If there are any questions regarding the pump ordrive unit which are not covered in this manual orin other literature accompanying this unit, pleasecontact your Gorman-Rupp distributor or the Gor-man-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

RECORDING MODEL ANDSERIAL NUMBERS

Please record the pump model and serial numberin the spaces provided below. Your Gorman-Ruppdistributor needs this informationwhen 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.

GHC SERIESOM--04352

PAGE I--2 INTRODUCTION

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 unsafepractices whichCOULDresult inminor personal injuryor productorproperty 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.

GHC SERIES OM--04352

PAGE A--1SAFETY

SAFETY --- SECTION A

This information is specific to Gorman-Rupp GHCSeries Rotary Gear Pumps. It applies throughoutthis manual and any manual or literature ac-companying the pump.

In addition to this manual, see the separate litera-ture covering the drive unit used to operate thispump.

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

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 pro-vide detailed instructions and precau-tions for each specific application or forevery situation that might occur duringmaintenance of the unit. Therefore, it isthe responsibility of the owner, installerand/or maintenance personnel to en-sure that applications and/or mainte-nance procedures not addressed in thismanual are performed only after estab-lishing that neither personal safety norpump integrity are compromised bysuch applications or procedures.

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 pumpoperation

covered in thismanual could lead to de-struction of equipment, injury, or death.

The standard version of this pump is de-signed to handle a wide range of light,medium, and heavy viscosity liquid, de-pending on design and components,and a range of temperatures when fittedwith different seals. Do not apply athigher temperatures that the seal willhandle. Do not attempt to pump liquidswhich may damage the pump or endan-ger personnel as a result of pump fail-ure; consult the factory for chemicalcompatibility.

If the pump and motor are furnishedmountedon abase,make certain that alllifting devices have adequate capacity.If chains or cables are used in lifting,make certain that they are positioned soas not to damage components, and sothat the load will be balanced.

After thepumphasbeen installed,makecertain that the pump and all piping orhose connections are secure before op-eration. Loose connectionscan result indamage to the equipment and seriousinjury to personnel.

Never operate the pump without a pres-sure relief valve installed on the pumpor in the discharge piping. Make certainthat pump-mounted pressure relief

OM--04352 GHC SERIES

PAGE A--2 SAFETY

valves are installed with their adjustingends toward the suction port. If bi-rota-tional operation is required, a pressurerelief device must be provided for bothdirections of flow. Operation without apressure relief valve or with an improp-erly installed relief valve could causethe pump to explode, resulting in seri-ous injury or death to personnel.

Before attempting toopenor service thepump:1. Familiarize yourself with this man-ual.

2. Lock out incoming power to thedrive unit to ensure that the pumpwill remain inoperative.

3. Allow the pump to completely coolif overheated.

4. Close the discharge and suctionvalve (if used).

An overheated pump can cause severeburns and injury. If overheating occurs:1. Stop the pump immediately.2. Allow thepump tocompletely cool.3. Refer to the instructions in thismanual before restarting thepump.

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.

Do not operate this pump withoutguards in place over the rotating parts.Exposed rotating parts can catch cloth-ing, fingers or tools, causing severe in-jury to personnel.


PAGE B--1INSTALLATION

INSTALLATION --- SECTION B

GENERAL INFORMATION

Review all SAFETY information in Section A.

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

Since pump installations are seldom identical, thissection is intended only to summarize general rec-ommendations and practices required to inspect,position, and arrange the pump andpiping. If thereare any questions concerning your specific instal-lation, contact your Gorman-Rupp distributor orthe Gorman-Rupp Company.

Most of the information applies to a flooded suctioninstallation where liquid is supplied under pres-sure.

If the pump is positioned above the liquid in a staticlift installation, information such as mounting, pip-ing configuration and priming must be tailored tospecific conditions.

These pumps are not recommended foruse with water. Some models when fittedwith specific optionsmay be used with wa-ter; consult the factory.

PUMP MODEL DESIGNATION

Following is a description of the model numberingsystem for Gorman-Rupp rotary gear pumps.Rotary gear pump model numbers include designstyle, port size, hydraulic size and constructioncode.

Typical Pump Model

GHS 1 1/2 GF 32

DesignStyle

PortSize

HydraulicSize

ConstructionCode

Design Style: Gorman-Rupp rotary gear pumpsare available in five basic designs:

S GMC --- Medium Duty --- Compact

S GMS --- Medium Duty

S GHC --- Heavy Duty --- Compact

S GHS --- Heavy Duty

S GHA --- Abrasive Duty

Port Size: Gorman-Rupp rotary gear pumps areavailable in port sizes from 1 to 6 inches, depend-ing on the design style. Consult your Gorman-Rupp distributor or the factory for additional sizes.

Hydraulic Size: The first letter in the hydraulic sizeis a rotor diameter code. The second letter indi-cates tooth length.

Construction Code: Construction Codes for Gor-man-Rupp rotary gear pumps are as follows:

Code Description

3 Iron w/Mechanical Seal(s)4 Iron w/Packing or Lip Seal(s)9 316 SST w/Mechanical Seal(s)10 316 SST w/Packing or Lip Seal(s)32 Steel w/Mechanical Seal(s)38 Steel w/Packing or Lip Seal(s)

Theoretical Displacement: Table B-1 indicatestheoretical displacement values for each hydraulicsize.

NOTEActual capacities and recommended shaft speedsvary according to application. Consult your Gor-man-Rupp distributor or the factory for addtional in-formation.

GHC SERIESOM--04352

PAGE B--2 INSTALLATION

Table B-1. Theoretical Displacement

HydraulicSize

Theoretical DisplacementPer Revolution

Gallons Centimeters3

DC 0.00568 21.486DE 0.00704 26.646GC 0.00967 36.619GF 0.01405 53.186GH 0.01915 72.479GJ 0.02317 87.700JG 0.03579 135.49JJ 0.05159 195.28JL 0.07078 267.94JP 0.10078 381.48NK 0.10665 403.71NM 0.14173 536.51NP 0.17681 669.31RM 0.24030 909.65RP 0.29979 1134.8RR 0.35927 1360.0RS 0.41876 1585.1SR 0.65752 2489.0SU 1.10240 4173.2TU 1.91280 7240.7

PREINSTALLATION INSPECTION

The pump assembly was inspected and tested be-fore shipment from the factory. Before installation,check for damage which may have occurred dur-ing shipment. Check as follows:

a. Inspect the pump assembly for cracks, dents,damaged threads, and other obvious dam-age.

b. Check for loose attaching hardware. Sincegaskets tend to shrink after drying, check forloose hardware at the mating surfaces.

c. Carefully read all tags, decals, and markingson the pump assembly, and perform all dutiesindicated.

STORAGE

Due to the extreme close machining toler-ances within rotary gear pumps, properstorage before installation is essential toprevent damage to the pump.

If the pump will not be immediately installed, followthese procedures or damage to the pump will oc-cur.

a. Do not flush the pump. Ensure that the portplugs shipped with the pump remain in placeuntil piping is installed to help prevent dust orother foreign objects from entering the pump.

b. Pumps that will not be installed for an ex-tended period should be stored indoors ifpossible. The factory-installed port plugs willnot ensure protection from excessive humid-ity, splash water or rain. In very humid or wetconditions, install air-tight plugs in the portsand fill the pump completely with a lubricatingpreservative liquid that is compatible with theliquid to be pumped.

c. Pumps stored outdoors must be fully pre-served as described above, completely cov-eredwith plastic or other water-tight material,and the covering anchored to ensure that itwill not be blown off.

Flushing

Clean piping is essential because of close-tolerancemoving parts in this pump. Flushall dirt, grit, weld beads or scale from thesuction piping before installing the pump.Damage to the pump because of debris inthe suction line is not covered by the pumpwarranty.

Before shipment, the pump may have been testedusing a petroleum-basedpreservative. If flushing isrequired, do not do so until just before installation;the test oil protects close-tolerance pump partsfrom corrosion.

Most cleaning solvents are toxic andflammable. Use them only in a well ven-tilated area free from flame, sparks, andexcessive heat. Read and follow all pre-cautions printed on solvent containers.



To flush the pump, use an approved solvent com-patible with the liquid being pumped. Make cer-tain that the solvent will not attack pump com-ponents, particularly seals and gaskets.

PUMP INSTALLATION

Pump dimensions are shown in the separatePump Specification Bulletin.

Never operate the pump without a pres-sure relief valve installed on the pumpor in the discharge piping. Make certainthat pump-mounted pressure reliefvalves are installed with their adjustingends toward the suction port. If bi-rota-tional operation is required, a pressurerelief device must be provided for bothdirections of flow. Operation without apressure relief valve or with an improp-erly installed relief valve could causethe pump to explode, resulting in seri-ous injury or death to personnel.

Lifting

Remove suction and discharge hose and pipingbefore attempting to lift the pump.Use liftingequip-ment with a capacity of at least five times the totalweight of the equipment being lifted.

Positioning The Pump

Locate the pump as close as possible to the liquidbeing pumped. Locating the pump below the liq-uid source will help self-priming and reduce thepossibility of cavitation.

Mounting

The pump may be shipped alone, mounted on abase, or with pump andmotormounted on a base.Install the pump and motor on a base beforemounting the base on a foundation.

Mount the base on a foundation that will providepermanent, rigid support for the pump, and will beheavy enough to absorb any vibration, strain orshock.

Piping

Before establishing suction and discharge lines,determine pump port positions and rotation. Fig-ure B---1 shows typical port positions for the stan-dard 180_ housing; if you have selected a 90_housing port option, your port positions will be dif-ferent.

Either hose or rigid pipemay be used tomake con-nections. If rigid piping is used, install expansionjoints to protect the pump from vibration and ther-mal expansion in the piping. Do not use expansionjoints or flexible connectors to adjust misalignedpiping.

Begin piping layout at the pump, and work towardthe source of supply and the point of discharge. Ifan obstacle is in the way of a suction or dischargeline, run the piping around the obstruction, notover it. Running piping over an obstruction willcreat an air pocket which will make priming moredifficult.

If possible, slope the piping toward the pump sonoair or liquid is trapped in the piping. If a long hori-zontal suction line is necessary, install the line be-low the liquid level whenever possible in order tokeep the piping full of liquid. This will make primingeasier because the pump will not have to removeas much air in the line.

Housing Position Std. 180_ Pump(3---9 O’clock) Housing Mounted Relief Valve

STD.

OPT.

Rotation Clockwise

Drive End Front End

Rotation Counter-clockwise

01A

Figure B-1. Typical Port Positions & Rotation

GHC SERIESOM--04352


The discharge and suction lines must be inde-pendently supported to avoid vibration and strainon the pump. For maximum pumping capacity,keep the lines as short and straight as possible. El-bows and fittings used in the lines increase frictionlosses; minimize their use. Reducers used in suc-tion lines should be the eccentric type installedwith the flat part uppermost to avoid creating airpockets.

Before tightening a connection or flange, align itexactly with the pump port. Never pull a pipe lineinto place by tightening the flange bolts and/orcouplings.

Gauges

Install a vacuumgauge in the suction lineand adis-charge pressure gauge in the discharge line (bothshould be as close as possible to the pump) tomonitor operation and assist in troubleshooting.

Strainers

Because of the close-tolerance moving parts ofthis pump, it is recommended that a strainer be in-stalled in the suction line. The strainer should belarge enough to prevent excessive vacuum, andcapable of operating under high vacuum withoutcollapsing. The net open area of the strainerscreen depends on liquid viscosity and desiredflow rate; in any case, the sum of the area of all theholes in the screen should be three to five times thearea of the suction pipe.

Sealing

Even a slight leak will affect priming, head, and ca-pacity, especially in a suction lift application. Sealall piping joints, valves and gauges with pipe dopeor teflon tape. The sealingmaterial should be com-patible with the liquid being pumped.

Valves

To avoid air pockets, install piping valves with thestem horizontal.

Toprevent leakageduring shutdown, install a shut-off valve in the discharge line, particularly on aflooded suction application. Shutoff valves are notrecommended for suction lines.

It is not recommended that a foot valve be installedat the end of the suction line. If desired to install afoot valve, consult the factory.

When handling very hot or cold liquids, install apressure relief valve in any part of the system thatcan be valved off or isolated; this will protect pipingagainst damage from liquid thermal expansion orcontraction from temperature changes duringshutdown.

Barrier Liquids for Dual Mechanical Seals

Pumps equipped with dual (tandem) mechanicalseals require a barrier liquid to prevent contamina-tion of the seal assembly by the liquid beingpumped. The barrier liquidmust have the followingcharacteristics:

a. Thebarrier liquidmust have sufficient lubricat-ing characteristics, including an optimum vis-cosity of 1 to 5 cSt at the temperature of theliquid being pumped.

b. The barrier liquid must be compatible in all re-spects with all pump and seal components towhich it will be exposed.

c. The barrier liquid must be compatible in all re-spects with the liquid being pumped.

Pumps equipped with dual mechanical seals re-quire the barrier liquid to be supplied at a continu-ous pressure equivalent to the maximum dis-charge pressure in order to avoid inboard seal faceseparation. The maximum barrier liquid pressurethat can be applied depends primarily on themaxi-mum seal design pressure (consult the factory).

Do not pressurize tandem seals. Pressurizing atandem seal will cause the seal faces to separate,resulting in leakage and/or damage to the seal.

Refer to the appropriate section in Seal Appendix,SectionF for your specific sealoption foroperatinginstructions for the barrier liquid reservoir kit.



ALIGNMENT

Make certain that power to the drive unitis disconnected before attempting toconnect the pumpdrive; otherwise, per-sonal injury may result.

NOTESee ROTATION in Section C before mounting thepump on the base.

Coupled Drives

When using couplings, the axis of the powersource must be aligned to the axis of the pumpshaft in both the horizontal and vertical planes.Most couplings require a specific gap or clearancebetween the driving and the driven shafts. Refer tothe coupling manufacturer’s service literature.

Align spider insert type couplings by using calipersto measure the dimensions on the circumferenceof the outer ends of the coupling hub every 90_.The coupling is in alignment when the hub endsare the same distance apart at all points (see Fig-ure B-2).

Figure B-2. Spider-type Couplings

Align non-spider type couplings by using a feelergaugeor taper gaugebetween the couplinghalvesevery 90_. The coupling is in alignment when thehubs are the same distance apart at all points (seeFigure B-3).

Figure B-3. Aligning Non-Spider Type Coupling

Check parallel adjustment by laying a straightedgeacross both coupling rims at the top, bottom, andside. When the straightedge rests evenly on bothhalves of the coupling, the coupling is in horizontalparallel alignment. If the coupling is misaligned,use a feeler gauge between the coupling and thestraightedge to measure the amount of misalign-ment.

V-Belt Drives

When using V-belt drives, the power source andthe pump must be parallel. Use a straightedgealong the sides of the pulleys to ensure that theyare properly aligned (see Figure B-4). In drive sys-temsusing twoormore belts, make certain that thebelts are amatched set; unmatched sets will causeaccelerated belt wear.

MISALIGNED:SHAFTS

NOT PARALLEL

MISALIGNED:SHAFTSNOT IN LINE

ALIGNED: SHAFTSPARALLEL ANDSHEAVES IN LINE

Figure B-4. V-belt Alignment

Tighten the belts in accordance with the belt man-ufacturer’s instructions. If the belts are too loosethey will slip; if they are too tight, there will be ex-cessive power loss and possible bearing failure.

GHC SERIESOM--04352


Select pulleys to match the proper speed ratio;overspeeding the pump may damage both pumpand power source.

Do not operate this pump withoutguards in place over the rotating parts.Exposed rotating parts can catch cloth-ing, fingers or tools, causing severe in-jury to personnel.

V-BELT TENSIONING

General Rules of Tensioning

For new v-belts, check the tension after 5, 20 and50 hours of operation and re-tension as required(see the following procedure for measuring belttension). Thereafter, check and re-tension if re-quired monthly or at 500 hour intervals, whichevercomes first.

Ideal v-belt tension is the lowest tension at whichthe belt will not slip under peak load conditions. Donot over-tension v-belts. Over-tensioning will short-en both v-belt and bearing life. Under-tensioningwill cause belt slippage. Always keep belts freefrom dirt, grease, oil and other foreign materialwhich may cause slippage.

Tension Measurement

Correct v-belt tension can be achieved using a v-belt tension tester and Table B-2 or B-3. Use thetables to find the v-belt size (cross-section), thesmallest sheave diameter, the belt type for your ap-plication. The corresponding deflection force re-quired for new or used belts is shown opposite theRPM range of the pump.

Belt Span

Deflection

Figure B-5. Belt Tension Measurement

The ratio of deflection to belt span is 1:64 for bothASA andmetric units. Therefore, a belt with a spanof 64 inches would require a deflection of 1 inch atthe force shown on the Tables for your particularapplication.

For example, if the span asmeasured in FigureB-5is 32 inches (813mm), the v-belt cross-section isC,the smallest sheavediameter is 8 inches, the pumpspeed is 1250 RPM, and the belts are uncoggedYy-T type, then 11.5 lbs. of force on the tensionershould show 1/2-inch (12,7 mm) of deflection.

A tension tester is available as an option fromGor-man-Rupp (P/N 29513---001). Other tension test-ers are available from your local belt/sheave dis-tributor, and work on a similar principal.

To use the Gorman-Rupp tensioner, measure thebelt span as shown in Figure B-5. Position the bot-tom of the largeO-ring on the span scale of the ten-sioner at the measured belt span. Set the small O-ring on the deflection force scale to zero.

Place the tension tester squarely on the belt at thecenter of the belt span. Apply force on the plunger,perpendicular to the belt span, until the bottom ofthe largeO-ring is evenwith the top of the next belt,or with the bottomof a straight edge laid across thesheaves.

Read the force applied from the bottomof the smallO-ring on the deflection force scale. Compare thisforce with the value shown in Table B-2 or B-3 andadjust the tension accordingly. Note that the ten-sion for new belts is higher than that for usedbelts to allow for expected belt stretching. Do notover-tension used belts to the higher deflectionforces shown for new belts.



CrossSection

SmallestSheaveDiameterRange

R.P.M.Range

UsedBelt

NewBelt

UsedBelt

NewBelt

Belt Deflection ForceUncoggedHy-T Belts &UncoggedHy-T TorqueTeam

CoggedTorque-Flex& MachinedEdge torqueTeam Belts

A,AX

3.0 - 3.6 1000-25002501-4000

3.72.8

5.54.2

4.13.4

6.15.0

3.8 - 4.8 1000-25002501-4000

4.53.8

6.85.7

5.04.3

7.46.4

5.0 - 7.0 1000-25002501-4000

5.44.7

8.07.0

5.75.1

9.47.4

B,BX

3.4 - 4.2 860-25002501-4000

4.94.2

7.26.2

4.4 - 5.6 860-25002501-4000

5.34.5

7.96.7

7.17.1

10.59.1

5.8 - 8.6 860-25002501-4000

6.36.0

9.48.9

8.57.3

12.610.9

C,CX7.0 - 9.0 500-1740

1741-300011.59.4

17.013.8

14.711.9

21.817.5

9.5 - 16.0 500-17401741-3000

14.112.5

21.018.5

15.914.6

23.521.6

D12.0 - 16.0 200-850

851-150011.59.4

17.013.8

14.711.9

21.817.5

18.0 - 20.0 200-850851-1500

30.425.6

45.238.0

3V,3VX

2.2 - 2.4 1000-25002501-4000

3.32.9

4.94.3

2.65 - 3.65 1000-25002501-4000

3.63.0

5.14.4

4.23.8

6.25.6

4.12 - 6.90 1000-25002501-4000

4.94.4

7.36.6

5.34.9

7.97.3

5V,5VX

4.4 - 6.7500-17491750-30003001-4000

10.28.85.6

15.213.28.5

7.1 - 10.9 500-17401741-3000

12.711.2

18.916.7

14.813.7

22.120.1

11.8 - 16.0 500-17401741-3000

15.514.6

23.421.8

17.116.8

25.525.0

8V12.5 - 17.0 200-850

851-150033.026.8

49.339.9

200-850851-1500

39.635.3

59.252.7

18.0 - 22.4

CrossSection

SmallestSheaveDiameterRange

R.P.M.Range

UsedBelt

NewBelt

UsedBelt

NewBelt

Belt Deflection ForceUncoggedHy-T Belts &UncoggedHy-T TorqueTeam

CoggedTorque-Flex& MachinedEdge torqueTeam Belts

A,AX

75 - 90 1000-25002501-4000

1.71.3

2.51.9

1.91.5

2.82.3

91 - 120 1000-25002501-4000

2.01.7

3.12.6

2.32.0

3.42.9

125 - 175 1000-25002501-4000

2.42.1

3.63.2

2.62.3

4.33.4

B,BX

85 - 105 860-25002501-4000

2.21.9

3.32.8

106 - 140 860-25002501-4000

2.42.0

3.63.0

3.23.2

4.84.1

141 - 220 860-25002501-4000

2.92.7

4.34.0

3.93.3

5.74.9

C,CX175 - 230 500-1740

1741-30005.24.3

7.76.3

6.75.4

9.97.9

231 - 400 500-17401741-3000

6.45.7

9.58.4

7.26.6

10.79.8

D305 - 400 200-850

851-150011.39.6

16.814.2

401 - 510 200-850851-1500

13.811.6

20.517.2

3V,3VX

55 - 60 1000-25002501-4000

1.51.3

2.22.0

61 - 90 1000-25002501-4000

1.61.4

2.32.0

1.91.7

2.82.5

91 - 175 1000-25002501-4000

2.22.0

3.33.0

2.42.2

3.63.3

5V,5VX

110 - 170500-17491750-30003001-4000

4.64.02.5

6.96.03.9

171 - 1275 500-17401741-3000

5.85.1

8.67.6

6.76.2

10.09.1

276 - 400 500-17401741-3000

7.06.6

10.69.9

7.87.6

11.611.3

8V315 - 430 200-850

851-150015.012.2

22.418.1

200-850851-1500

18.016.0

26.823.9

431 - 570

Table B-2. Sheave Diameter (In.)Deflection Force (Lbs.)

Table B-3. Sheave Diameter (Mm.)Deflection Force (Kg.)

ELECTRICAL CONNECTIONS

Before connecting an electric motor to incomingpower, check that the electrical service availablematches the pump motor requirements stampedon the motor nameplate.

The electrical power used to operatethis pump is high enough to cause inju-ry or death. Obtain the services of a qu-

GHC SERIESOM--04352


alified electrician to make all electricalconnections.

Do not install and operate a non-explo-sion proof motor in an explosive atmo-

sphere. Install, connect, and operatethe motor in accordance with The Na-tional Electrical Code and all localcodes. If there is a conflict between theinstructions in the manual accompany-ing the unit and The National ElectricalCode or the applicable local code, TheNational or local code shall take prece-dence.


PAGE C--1OPERATION

OPERATION --- SECTION C


Follow the instructions on all tags, labels anddecals attached to the pump.

PUMP OPERATION

Never use a pressure relief valve to reg-ulate liquid flow. Pressure relief valvesare designed as safety devices only. At-tempting to regulate flow with a pres-sure relief valve may cause the pump orpiping to explode, causing severe per-sonal injury or death.

PRE-OPERATION

Make certain that all instructions in INSTALLA-TION, Section B have been carried out.

The standard version of the pump is de-signed to handle a wide range of light, me-dium, and heavy viscosity liquids, depend-ing on design and components. Do notop-erate the pumpwith higher liquid tempera-tures thanwhat it wasdesigned; otherwise,pump components and operation may beaffected. For temperature range consultThe Gorman-Rupp Company.

Before Starting The Pump

Never operate the pump against aclosed suction or discharge valve. Thepump will overheat, and may rupture orexplode, causing personal injury ordeath.

Open all valves in the suction and discharge lines,and close all drain valves.

If your pump is equippedwith a packing seal, loos-en the glandnuts before starting the pump until thepacking gland may be moved slightly. If leakageseems excessive after starting, wait until the pumphas run long enough to reach its normal operatingtemperature before adjusting the gland nuts. Donot over-tighten the gland nuts. Packing pumpsmust leak slightly to cool and lubricate the shaftand to allow the shaft to turn freely.

Consult the drive manufacturer’s operating manu-al before attempting to start the drive.

In a suction lift application, fill the pump housingwith liquid to seal clearances and to lubricate thepump.

Checking Pump Rotation

Correct rotation of your pump is shown on thepump serial plate or direction arrow plate.

In applications with a single direction offlow and a single pump-mounted pressurerelief valve, make certain that the drive unitturns the pump in the correct direction ofrotation. Otherwise, the pump-mountedpressure relief valve will not function.

Follow the drive unit manufacturer’s instructions,jog the pump motor briefly, and check rotation.

If a 3-phase motor is being used and rotation is in-correct, have a qualified electrician interchangeany two of the 3-phase wires to change the direc-tion of rotation. If a 1-phase motor is being usedand rotation is incorrect, consult the motor man-ufacturer’s literature.

STARTING

Start the drive unit as indicated in the manufactur-er’s instructions and observe the suction and dis-charge gauges. If the pump does not deliver liquid


PAGE C--2 OPERATION

within oneminute, stop the drive unit.Do not oper-ate the pump more than one minute without liquidin it; dry operation will damage or destroy thepump.

Although this pump is self-priming, neveroperate it dry. Dry operation could causegalling, seizing, damage to the seal or ex-cessive wear of rotating parts.

Review the previous steps outlined in PRE-OP-ERATION and review TROUBLESHOOTING,Section D. If everything appears normal, add liquidto the pump housing to assist priming and start thedriver again.

If the pump does not deliver liquid, stop the pump;it may be necessary to vent the discharge line untilliquid begins to flow.

If the pump still does not deliver after consultingTROUBLESHOOTING and venting the dischargeline, contact your local Gorman-Rupp Rotary GearDistributor or the factory.

OPERATION

NOTEIf the pump malfunctions or does not meet operat-ing specifications, refer to TROUBLESHOOTING--- Section D.

Achange in operating noisewhen liquid first entersthe pump is normal. After the pump is fully opera-tional, monitor it for any unusual noises or vibra-tion; if either occurs, shut the pump down immedi-ately.

Liquid Temperature

Do not install the pump in a service with higher liq-uid temperatures than what it was designed. Intro-ducing hot liquid into a cold pump will expandparts unevenly, causing excessive wear, pump fail-ure, and operation may be affected. This thermalshock can be reduced by gradually heating the liq-uid being introduced into the pump. If it is not pos-

sible to heat the liquid, use heat tape and/or insula-tion to heat the pump.

High temperature bushings as well as optionaljackets which may be used to heat or cool thepump are available options for many models.

Overheating

Overheating canoccur if the pump is operatedwithvalves in the suction or discharge lines closed. Op-erating against closed valves could bring the liquidto a boil, build pressure, and cause the pump torupture or explode. If overheating occurs, stop thepump and allow it to completely cool before servic-ing.

Do not remove plates, covers, gauges,pipe plugs or fittings from an overheatedpump. Vapor pressure within the pumpcan cause parts being disengaged to beejected with great force. Allow the pump tocompletely cool before cooling.

Checking Gauges

Monitor vacuum and pressure gauge readings toensure that the pump is operating within normalrange and delivering full flow.

Strainer Check

If a strainer has been installed in the suction line,monitor vacuum gauge readings to detect block-age. Check the strainer if flow rate begins to drop.

Never introduce air or steam pressureinto the pump housing to remove ablockage. This could result in personalinjury or damage to the equipment. Ifbackflushing is absolutely necessary,limit liquid pressure input to 50% of themaximum permissible operating pres-sure shown in the pump performancedata.


PAGE C--3OPERATION

Leakage

No leakage should be visible at pump mating sur-faces or at pump connections or fittings. Keep allline connections and fittings tight to maintainmaxi-mum efficiency.

If your pump is equipped with a packing seal, thepacking is lubricated by the liquid being pumped.Some leakage around the packing seal is normal.Packing pumps must leak slightly to cool and lu-bricate the shaft and to allow the shaft to turn freely.

Wait until the pump has run long enough to reachits normal operating temperature to adjust thegland nuts. Adjust the nuts only tight enough to re-duce excessive leakage.

PRESSURE RELIEF VALVEADJUSTMENT

Some pumps are not provided with a pressure re-lief valve. A pressure relief valve must be installedon the pump or in the discharge piping to ensuresafe operation. Otherwise, the pumpmay be dam-aged and personnel injured.

If operating at high temperatures, allow thepump to completely cool before attempt-ing any adjustments.

Cracking Pressure

Cracking pressure is the pressure at which thepressure relief valve first begins to open and by-pass fluid. The nominal crackingpressure of the re-lief valve providedwith this pump is set at the facto-ry and is indicated on the tag attached to the reliefvalve.

If the nominal cracking pressure set at the factorymust be changed, see Table E-2 and instructions inSection E - MAINTENANCE AND REPAIR.

Complete By-pass Pressure

Complete by-pass pressure is the maximum pres-sure the pumpwill see when all the pumped fluid isbeing by-passed through the pressure relief valve.This pressure will vary depending on the crackingpressure setting, liquid viscosity, and pump speed(pump capacity).

To determine the complete by-pass pressure, referto the pump performance chart or consult the fac-tory.

Do not remove the adjusting screw jamnut; with the jam nut removed the reliefvalve spring(s) can be compressed toofar for the valve to open. If the valvedoes not open, excessive pressure candevelop, causing damage to the pumpand possible injury to personnel.

STOPPING

If the pump will be out of service for an extendedlength of time, particularly when handling non-lu-bricating liquids, drain the system and flush thepump and piping with an oil-based preservative toprotect close-tolerance pump parts.

When handling liquids that solidify when at rest(tar, glue, etc.), flush the pump and piping with anapproved solvent compatible with the pump com-ponents and the liquids being pumped.


PAGE D--1TROUBLESHOOTING

TROUBLESHOOTING --- SECTION D


Before attempting to open or service thepump:1. Familiarize yourselfwith thismanual.2. Allow the pump to completely cool ifoverheated.

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

4. Close the suction and dischargevalves.

5. Drain the pump.

TROUBLESHOOTING WITH GAUGES

Most pump or system malfunctions can be detected by installing vacuum suction and discharge pressuregauges. Read the gauges and refer to the following information for interpretation of the gauge readings. Foradditional troubleshooting procedures, see the TROUBLESHOOTING CHART.

Vacuum Gauges

HIGH READING

Suction valve closed, suction line blocked,foot valve jammed, strainer blocked.Liquid too viscous.Lift too high.Suction line undersized.

LOW READING

Air leak in suction line.End of suction line not submerged.Pump parts worn or defective.End clearance too great.No liquid in pump housing.

ERRATIC READING

Liquid overheated, vaporizing.Liquid entering intermittently, suction air leak,end of suction line not submerged.Vibration from cavitation, misalignment, dam-aged parts.

Pressure Gauges

HIGH READING

Liquid too viscous.Discharge line undersized or too long.Discharge valve partially closed.Strainer blocked.Relief valve pressure set too high.Thermal changes in liquid.

LOW READING

Relief valve pressure set too low.Internal valve not seating properly.Pump bypass partially open.End clearance too great.Pump parts worn or defective.

ERRATIC READING

Cavitation.Liquid entering intermittently, suction air leak,end of suction line not submerged.Drive misalignment causing vibration.

GHC SERIESOM--04352

PAGE D--2 TROUBLESHOOTING

TROUBLESHOOTING CHART

Shaft seal leaking; gaskets, O-ringsworn.

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP DOESNOT DELIVERRATED DIS-CHARGE ORCAPACITY

PUMP FAILSTO PRIME ORLOSES PRIME

Air leak in suction line; end of suctionline not submerged; foot valve blockedor jammed; insufficient liquid in sumportank.

Check and correct as required.

Shaft seal leaking; gaskets, O-ringsworn.

Check vacuum gauge; disassemblepump and replace faulty parts.

Leaking relief valve. Disassemble and repair.

Suction lift too high. See INSTALLATION, SECTION B andcheck piping.

Suction strainer clogged. Check strainer.

Pump rotation incorrect. See OPERATION, SECTION C andcheck rotation.

Pump speed too slow. Check driver speed.

Check and correct as required.

Readjust.

Suction or discharge lines blocked;suction or discharge valves closed.

Check strainer, valves and piping.

Air leak in suction line; end of suctionline not submerged; foot valve blockedor jammed; insufficient liquid in sumportank.

Check vacuum gauge; disassemblepump and replace faulty parts.

Relief valve pressure set too low.

Housing dry. Add liquid to housing, see OPERATION,SECTION C.

Rotating parts worn or damaged; im-proper end clearance.

Replace defective parts; see SETTINGEND CLEARANCE in Maintenance AndRepair, Section E.

Pump speed too slow. Check driver speed; check belts/coup-lings.

PUMP REQUIRESTOO MUCHPOWER

Pump speed too high. Reduce driver output.

Internal parts worn. Disassemble pump and inspect.

Discharge line undersized and/or toolong.

Increase size, decrease length.

Pump “starving” or liquid vapor-izing in suction line.

Increase suction pipe size or reducelength; position pump below liquid level.

Pump “starving” or liquid vaporizingin suction line.


Insufficient end clearances. Readjust clearance; see SETTING ENDCLEARANCE in Maintenance and Re-pair, Section E.

Internal clearance too great. Check and readjust clearance if re-quired; see SETTING END CLEAR-ANCE inMaintenanceandRepair, Sec-tion E.


PAGE D--3TROUBLESHOOTING

TROUBLESHOOTING CHART (Cont.)

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

Power source undersized. Check power requirements for applica-tion; resize as required.

EXCESSIVENOISE ORVIBRATION Pumping entrained air. Check liquid level.

Pump operating outside designedoperating range.

Check discharge head and flow; adjust asrequired to meet performance specifica-tions.

PUMP REQUIRESTOO MUCHPOWER(Cont.)

Pump and/or drive mounting notsecure; drive misaligned.

Tighten mounting hardware; realigndrive.

Rotating partsworn or damaged; im-proper end clearance.

Replace defective parts; check endclearance.

Liquid in pump solidified. Clear or heat.

Relief valve chatter. Increase pressure setting.

Lubrication required. Add lubricant, as needed.

Lubrication required. Add lubricant, as needed.

Corrosive liquid. Check local distributor or factory forparts compatibility with liquid; check liq-uid for contamination.

EXCESSIVEWEAR

Exceeding operating limits. Check performance data inPumpSpeci-fications Bulletin.

Insufficient end clearance. See SETTING END CLEARANCE inMaintenance And Repair, Section E.

Pump running dry. Add liquid to prime (See Operation, Sec-tion C); check liquid flow.

Pump and/or drive mounting not se-cure; drive misaligned; piping incor-rectly installed.

Tighten mounting hardware; realigndrive; check piping.

Insufficient lubrication. Add lubrication and maintain at proper lev-el.

Pump “starving” or liquid vapor-izing in suction line.


Pumpand/or piping not secure; drivemisaligned.

Anchor base or piping, realign drive.

Insufficient internal clearances. Consult factory.

Abrasive liquid. Consult factory.

Contaminated liquid. Check liquid source; install strainer.

GHC SERIESOM--04352

PAGE D--4 TROUBLESHOOTING

PREVENTIVE MAINTENANCE

Since pump applications are seldom identical, andpump wear is directly affected by such things asthe abrasive qualities, pressure and temperatureof the liquid beingpumped, 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 rotary gear pump. For specificquestions concerning your application, contactyour Gorman-Rupp distributor or the Gorman-Rupp Company.

Record keeping is an essential component of agood preventive maintenance program. The ap-pearance of wearing parts should be documentedat each inspection for later comparison. Also, if re-cords indicate that a certain part (such as the seal)fails at the same duty cycle, this part can bechecked and replaced before failure occurs.

Because of the tight tolerances within your rotarygear pump, wear between rotating parts is normaland expected. For new applications, a first inspec-tion at 250 hours will give insight into the wear ratefor your particular application. Subsequent inspec-tions should be performed at regular intervals of2000 hours. Critical applications should be in-spected more frequently.

Check the thrust washer (medium duty models),idler bushing, idler pin, idler assembly, shaft bush-ing and rotor/shaft assembly at each inspection.Wear patterns should be uniform, without evi-dence of deep or irregular grooves.

For packing pumps, periodic adjustment of thepacking is required to keep leakage to a minimum(see the adjustment procedure described underLeakage in Operation, Section C). Do not over-tighten. Replace the packing if leakage cannot bereduced by a slight adjustment.

If the pump is equipped with a backhead bearing(heavy dutymodels), inspect for free rotation of theshaft and rotor, and excessive endplay or radialmovement of the shaft, which could indicate bear-ing wear. Remove the rotor adjusting sleeve as-sembly and inspect the bearing for damagedseals. Replacing the bearing at the first indicationof a problem can extend the life of the pump andsave considerable expense later to replace majorcomponents that can be damaged if the bearing isallowed to fail.

After extended service, adjustment of the clear-ance between the rotor and the head will normallyimprove performance (see the adjustment proce-dure in Maintenance And Repair, Section E).

If the pump is to be removed fromservice for repair,be sure to protect the internal components fromrusting while the pump is disassembled and afterreassembly if not immediately placed back intoservice.


PAGE E--1MAINTENANCE AND REPAIR

MAINTENANCE AND REPAIR --- SECTION E

MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILLMAINTAIN PEAK OPERATING PERFORMANCE.

Pump Model

Your pump model number and serial number are shown on the Parts List, furnished as aseparate document with this manual.

Below the pump model number on the Parts List, is a grouping of several alpha-numericcodes. This code identifies the optional features of the pump. Be sure to include thisgrouping, along with the model number and serial number, when ordering parts.

The sectional views cover disassembly and reassembly for the pump models shown be-low. Refer to the Parts List for your specific pump model.

The Following Pumps Are Covered By This Manual.

GHC SERIESIRON AND STEEL

PUMPS


PAGE E--2 MAINTENANCE AND REPAIR

Shown: Standard Model With 180_ Ports and Housing-Mounted Relief Valve. Also Available With 90_ Ports And/OrHead-Mounted Relief Valve. Coverplate Kit Replaces Either Relief Valve When Not Used.

NOTE: Refer to Seal Appendix, Section F for details of the seal assembly and related components.

Figure E---1. Typical GHC Pump Models

ITEMNO.

PART NAME ITEMNO.

PART NAME



PARTS KEY FOR FIGURE E-1

Note: Item numbers cross reference to specific part numbers on the separate Parts List.

01 HEAD KIT01A ---HEAD ASSEMBLY01AA ---HEAD01AB --- IDLER PINP ---PIPE PLUG01B ---GASKET (OR OPTIONAL O-RING)B ---CAPSCREW

02 IDLER ASSEMBLY02A --- IDLER02B ---BUSHING

03 ROTOR/SHAFT KIT03A ---ROTOR/SHAFT ASSEMBLY03B ---BEARING LOCKWASHER03C ---BEARING LOCKNUTN ---SHAFT KEY

04 HOUSING ASSEMBLY04A ---HOUSINGP ---PIPE PLUG

05 SEAL & RELATED COMPONENTS(SEE SECTION F)

06 BACKHEAD KIT06A ---BACKHEAD ASSEMBLY06AA ---BACKHEAD06AD ---THROTTLE BUSHING SLEEVE06AE ---THROTTLE BUSHINGP ---PIPE PLUG06B ---GASKET (OR OPTIONAL O-RING)B ---SOCKET HD CAPSCREW

07 ROTOR ADJUSTING SLEEVE KIT07A ---ROTOR ADJUSTING SLEEVE ASSY07AA ---ROTOR ADJUSTING SLEEVE07AC ---BALL BEARING07AD ---BEARING RETAINING NUTGA ---SOCKET HD SETSCREWO ---O-RING

08 FOOT BRACKET KIT08A ---FOOT BRACKETB ---CAPSCREWD ---NUT

10 RELIEF VALVE KIT10A ---RELIEF VALVE ASSEMBLY10AA ---VALVE BODY10AB ---WARNING PLATEBM ---DRIVE SCREWB ---SOCKET HD CAPSCREWO ---O-RING

12 NAMEPLATE KIT12A ---NAMEPLATEBM ---DRIVE SCREW

NOT SHOWN:SECONDARY OR OPTIONAL SEAL(IF REQUIRED, SEE SECTION F)

NOT SHOWN:11 HEAD COVERPLATE KIT11A ---COVERPLATE ASSEMBLY11AA ---COVERPLATE11AC ---WARNING PLATEBM ---DRIVE SCREWP ---PIPE PLUGK ---WASHERB ---CAPSCREWO ---O-RING



GHC Series Standard Pump180_ PORTS, HOUSING-MOUNTEDRELIEF VALVE, FOOT BRACKET

GHC Series Optional Pump(180_ PORTS, HOUSING AND

HEAD-MOUNTED RELIEF VALVES,MOTOR ADAPTOR)

GHC Series Optional Pump(90_ PORTS, NO RELIEF VALVE,

FOOT BRACKET)

GHC Series Optional Pump(90_ PORTS, HEAD-MOUNTEDRELIEF VALVE, FOOT BRACKET)

GHC Series Optional Pump(180_ PORTS, NO RELIEF VALVE,

FOOT BRACKET)

NOTEEach version shown with Mechanical Seal. Allversions available with Lip Seal as standard. Allversions available with or without Foot Bracket.All versions available with Motor Adaptor.

Figure E---2. Assembled GHC Pump Models



PUMP DISASSEMBLY ANDREASSEMBLY


Follow the instructions on all tags, labels anddecals 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 thewearingparts, follow these instructions which, unlessotherwise specified, are keyed to the sectionalview (see Figure E-1) and the accompanying partskey. Refer to the separate parts list accompanyingyour pump for part numbers.

In the following text, minor headings are followedby a number in parenthesis. This number repre-sents the assembly for the itembeing discussed asidentified in Figure E-1.

Before attempting to service the pump, disconnectthe power source to ensure that it will remain inop-erative. Remove the hardware securing the pumpto the power source, and separate the powersource and pump assembly. Retain all connectionparts such as shaft keys, etc.

Close all valves in the suction and discharge lines.Disconnect the suction and discharge hose/pip-ing.

For power source disassembly and repair, consultthe literature supplied with the power source, orcontact your local power 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 pro-vide detailed instructions and precau-tions for each specific application or forevery situation that might occur duringmaintenance of the unit. Therefore, it isthe responsibility of the owner, installer

and/or maintenance personnel to en-sure that applications and/or mainte-nance procedures not addressed in thismanual are performed only after estab-lishing that neither personal safety norpump integrity are compromised bysuch applications or procedures.

Do not attempt to service the pump un-less all power to the power source hasbeen disconnected; otherwise, seriouspersonal injury or death could result.

PUMP DISASSEMBLY

Use caution when handling the idler (02A)and the rotor shaft assembly (03A). Theseparts have sharp edges which will growsharper with use.

In the instructions which follow the FRONT is thehead coverplate end of the pump and the REAR isthe drive (or backhead) end of the pump.

NOTEIt is strongly recommended that gaskets and O-rings be replaced whenever the pump is reassem-bled.

Pressure Relief Valve (10)

If the pump is equippedwith a pressure relief valve(10A), it can bemountedon either the headassem-bly (01A) or the housing assembly (04). Somemodels are equipped with one of each. Take noteas to the direction in which the relief valve ismounted. To remove either style, remove the caps-crews (B) securing the relief valve to the pump. TheO-rings (O) may remain in the head (01A) or in thehousing (04A). Remove and discard the O-rings.For relief valve maintenance, see RELIEF VALVEDISASSEMBLY followed by RELIEF VALVE RE-SASSEMBLY at the end of this section.



Rotor Adjusting Sleeve (07)

Before attempting to remove the bearing locknut(03C), loosen the socket head setscrews (GA) se-curing the rotor adjusting sleeve (07) and turn therotor adjusting sleeve clockwise (as viewed fromthe drive end) until the rotor binds against thehead. This will prevent the rotor from turning as thelocknut is unscrewed.

Straighten the tab on the bearing lockwasher (03B)and use a hammer and drift pin to loosen the bear-ing locknut until it can be unscrewed from theshaft. Remove the bearing lockwasher.

Unscrew the rotor adjusting sleeve kit from thebackhead.

NOTEPart or all of the seal assembly (5) will be removedwith the rotor adjusting sleeve. Check theParts Listfurnished with your pump to identify the seal, referto Seal Appendix, Section F for removal of the sealand related components, then proceed as followswith rotor adjusting sleeve disassembly.

When removing or installing the bearing(07AC), never hit or press against the innerrace. Press only against the outer race.

Secure the rotor adjusting sleeve (07AA) in a vicewith the drive side down. Position a suitably sizedscrewdirver horizontally through the slots in thebearing retaining nut and use the screwdriver tounscrew the bearing retaining nut from the rotoradjusting sleeve. The bearing (07AC) is a lightpress fit into the rotor adjusting sleeve and canusually be removed with thumb pressure only. Ifthe bearing does not come out easily, use a suit-able sized sleeve and a mallet to lightly tap thebearing from the bore.

Refer to Cleaning and Inspection in this sectionbefore reassembling the rotor adjusting sleeve.

Coverplate Kit (11)

(Figures E-1 and E-3)

The coverplate kit may be mounted on either thehead assembly or the housing assembly. Removalis the same for either.

01A01AA

01B

01AB

02A02B

P

K

B

11AAP

O

Figure E-3. Head Coverplate Kit, Head KitAnd Idler Disassembly

Remove the hardware (B and K) securing the cov-erplate (11AA) to the head (01AA) or housing(04A). The O-rings (O) may remain in the head orhousing. Remove and discard the O-rings.

Head/Idler Kit


Remove the hardware (B) securing the head jacket(01G, optional) and/or head (01A) to the housing(04A). Separate the head jacket from the head as-sembly. Remove and discard the O-rings (O) andgasket (01B).

Use caution to prevent the idler assemblyfrom dropping off the idler pin; the idlermay be damaged if it falls on a hard sur-face.

Pull the head assembly (01A) from the housing as-sembly (04A, Figure E-1). Take care not to let theidler assembly (02) slide off the idler pin (01AB).Remove the check pipe plug (P) from the suctionside of the head (01AA).




NOTEThe idler bushing (02B) may be damaged duringremoval. Donot remove the idler bushing unless re-placement is required.

Remove the assembled idler (02) from the head as-sembly. Inspect the idler bushing (02B) for exces-sive wear or scoring. If replacement is required,use an arbor (or hydraulic) press to remove theidler bushing (02B) from the idler (02A).

To remove the idler pin (01AB), lay the head as-sembly (01A) on an arbor (or hydraulic) press withthe idler pin (01AB) facing down and remove theidler pin (01AB) from the head (01AA).

Seal Removal (05)

The seal assembly (05) is available in a variety ofconfigurations. Check theParts List furnishedwithyour pump to identify the seal, then refer to SealAppendix, Section F, for removal of the seal andrelated components.

Rotor/Shaft Removal (03)

With the seal removed, simply slide the rotor/shaftassembly (03A) out of the housing (04A). Due toclosemachine tolerances and assembly practices,the rotor/shaft is available only as an assembly.Further disassembly is not required.

Foot Bracket Kit (08)

Remove the hardware (B and D) securing the footbracket (08A) to the head (01AA) and the back-head (06AA).

Backhead Kit Removal (06)


Remove the screws (B) securing the backhead as-sembly (06A) to the housing assembly (04), and

separate the assemblies. Remove and discard thegasket (06B) or O-ring (O).

NOTEThe shaft bushing (06AE) may be damaged duringremoval. Do not remove the throttle bushing unlessreplacement is required. Due to tight tolerances,the throttle bushing sleeve (06AD) must be re-moved from the backhead in order to replace theshaft bushing.

Use an arbor (or hydraulic) press and a suitablysized dowel to press the throttle bushing sleevefrom the backhead.

Use an arbor (or hydraulic) press and a suitablysized dowel to press the shaft bushing out of thethrottle bushing sleeve.

06AE

B

06AD

06A06AA06B PC

Figure E-4. Backhead

Housing Assembly (04)

NOTEIf your pump is equipped with an optional housingbushing (04B), special tools are required for re-moval and installation. Consult the factory if re-placement is required.

NOTESeal cavity pressure relief is accomplished usingsocket head pipe plugs (P) in the back side of thehousing. Removal of the plugs is not required un-less the direction of pump rotation is to bechanged.

If pump rotation is to be changed, remove thesocket head pipe plugs (P) from the housing. The



hole adjacent to the discharge port will have asmall pipe plug under the larger, outer pipe plug.This plug must be removed to change rotation.

PUMP REASSEMBLY


Cleaning and Inspection

Most cleaning solvents are toxic andflammable. Use them only in a well ven-tilated area free from flame, sparks, andexcessive heat. Read and follow all pre-cautions printed on solvent containers.

Clean and inspect the pump parts (except thebearing and seal assembly) with a cloth soaked infresh cleaning solvent. Inspect all parts for exces-sivewear or for anynicks or burrs. Removenicks orburrs using emery cloth or a fine file. Replace anyparts that are badly worn or damaged.

Clean the bearing in fresh cleaning solvent andcoat with light oil.

Rotate the bearing byhand to check for roughnessor binding. If rotation is rough or there is any side-to-side movement between the inner and outerraces, replace the bearing.

The bearing is permanently sealed and re-quires no additional lubrication except acoating of light oil on external surfaces toease reassembly. External surfaces mustbe kept free of all dirt and foreign material.

Failure to do so could damage the bearingor its mating surfaces.

The bearing tolerance provides a light press fit intothe rotor adjusting sleeve (07AA). Replace the ro-tor adjusting sleeve if the proper fit is not achieved.

Clean and inspect the seal assembly as indicatedin the appropriate section of the Seal Appendix,Section F.

Bushing Preparation

When replacing bushings, lightly oil the O.D. of thereplacement bushing before installation.

Be very careful when installing graphitebushings. Graphite is extremely brittle andwill crack if improperly installed. Use apress to install thebushingwith onecontin-uous motion until the bushing is fullyseated. Stopping in mid-stroke will causethe bushing to crack. After installation,check the bushing for cracks.

NOTEWhen installing high temperature graphite bush-ings, heat the part that receives the bushing to500_F and place the bushing in a freezer for at leastone hour. This will allow easier installation with lesschance of breakage.

Housing Assembly (04)

Inspect and clean the housing (04A) (and optionalhousing bushing (04B), if so equipped)with a clothsoaked in fresh cleaning solvent.

NOTEIf your pump is equipped with an optional housingbushing (04B), special tools are required for re-moval and installation. Consult the factory if re-placement is required.

Most cleaning solvents are toxic and



flammable. Use them only in a well ven-tilated area free from flame, sparks, andexcessive heat. Read and follow all pre-cautions printed on solvent containers.

If the socket head pipe plugs (P) in theback side of the housing were removed inorder to change the directionof pump rota-tion, the smaller diameter plug must beinstalled in the hole adjacent to the dis-charge port of the housing. Otherwise,over-pressurization of the seal cavity couldresult in premature seal failure.

If the socket head pipe plugs (P) in the back side ofthe housing were removed, install the smaller di-ameter plug in the hole adjacent to the dischargeport, and install one of the larger diameter pipeplugs over the smaller one. Install the second largepipe plug in the other hole in the back of the hous-ing adjacent to the suction port.

Backhead Kit (06)


Use an arbor (or hydraulic) press and a suitablysized sleeve to press the shaft bushing (06AE) intothe throttle bushing sleeve (06AD) until it is flushwith the face of the sleeve.

Position the backhead (06AA) on the bed of an ar-bor (or hydraulic) press with the rotor end facingup. Use an arbor (or hydraulic) press and a suitablysized dowel to install the assembled throttle bush-ing sleeve and shaft bushing in the backhead untilfully seated.

Install a new gasket (06B) over the throttle bushingsleeve (06AD).

BACKHEAD

HOUSING

9 O’CLOCK

BALANCEHOLE AT 12O’CLOCK

THROTTLEBUSHINGSLEEVE

THROTTLEBUSHING

DRAIN HOLEAT BOTTOM

3 O’CLOCK

Figure E-5. Housing/BackheadAlignment

Position the balance hole as shown in Figure E-5,and secure the backhead assembly (06) to thehousing (04) with the capscrews (B).

Secure the foot bracket (08A) to the backhead as-sembly (06) with the previously removed hardware(B and D).

Rotor/Shaft Assembly (03)

Inspect the rotor/shaft assembly (03A) for exces-sive wear, scoring or scratches along the shaftsealing surface. If replacement is required, theshaft and rotor must be replaced as an assembly.Small scratches can be dressed with a fine file oremery cloth. Replace the rotor/shaft assembly orany other parts if wear or damage is extensive.

Slide the rotor/shaft assembly into the housing andbackhead. Use caution not to scratch the I.D. ofthe bushings (04B or 06AE).

Seal Installation (05)

The seal assembly (05) is available in a variety ofconfigurations. Check theParts List furnishedwithyour pump to identify the seal, then refer to SealAppendix, Section F, for installation of the sealand related components.

Head/Idler Kit


If the idler pin (01AB) was removed, heat the head(01AA) in an oven to 500_F (260_C) to ease instal-lation of the pin. Carefully install the pin in the head



with the chamfer side toward the head and themilled flat side facing the crescent. (If the pin isstepped, position it with the large chamfered endtoward the head.)Make sure the pin bottoms out inthe head.

NOTEWhen properly installed, the pin will be positioned0.010 inch below the surface of the crescent.

If removed, install the pipe plug (P) in the hole in thesuction side of the head (01AA).

Lightly oil the I.D. of the idler (02A), and use an ar-bor (or hydraulic) press to install the idler bushing(02B) in the idler. The bushing should be centeredat both ends of the idler.

Place the head (01A) on a flat surface. Lightly oil theidler bushing (02B) and pin (01AB); install the idlerassembly (02) on the pin. Spin the idler to makecertain that it moves freely on the pin.

Install the head gasket (01B) over the head. Care-fully position the head and idler against the hous-ing and engage the idler and rotor/shaft assembly(03A). Turn the rotor/shaft until the idler and rotorteeth engage. Do not force.

Slide the head into the housing assembly. Rotatethe head assembly (01A) until the groove in thehead matches the groove in the housing. Securethe head to the housing with the capscrews (B).

Coverplate Kit (11)


The coverplate kit may be mounted on either thehead assembly or the housing assembly. Installa-tion is the same for either.

Lightly lubricate the O-rings (O) with oil and installthem in the housing (04A). Secure the coverplate(11AA) with the hardware (B). Be sure that thewarning plate (11AC) is attached to the coverplate.

Foot Bracket Kit (08)

Secure the foot bracket (08A) to the head (01A)and backhead assembly (06A) with the hardware(B and D).

Rotor Adjusting Sleeve (07)

Clean the rotor adjusting sleeve and all componentparts as described in Cleaning and Inspection.Inspect the parts for wear or damage and replaceas necessary.

Use an arbor (or hydraulic) press and install thebearing in the rotor adjusting sleeve (07A) until itbottoms out on the shoulder of the rotor adjustingsleeve.

Apply 1 to 2 drops of “Loctite Thread Locker No.272” or equivalent compound to the threads of thebearing retaining nut (07AD) and screw the nut intothe rotor adjusting sleeve (07AA) until fully seatedagainst the bearing.

NOTEPart or all of the seal assembly (05) must be in-stalled with the rotor adjusting sleeve. Check theParts List furnished with your pump to identify theseal, refer to Seal Appendix, Section F for installa-tion of the seal and related components, then pro-ceed as follows with rotor adjusting sleeve installa-tion. Use caution not to damage seal parts wheninstalling the rotor adjusting sleeve.

Loosen the socket head setscrews (GA). Slide therotor adjusting sleeve kit over the shaft. Use cau-tion not to damage installed seal components onthe shaft. Screw the rotor adjusting sleeve into thebackhead until the rotor bottoms against the head.

Install the bearing lockwasher (03B) and screw thebearing locknut (03C) onto the shaft until tight.Align one of the slots in the locknut with one of thetabs on the lockwasher, and use a hammer andpunch to bend the tab on the lockwasher over intothe slot on the locknut.

Proceed with Setting End Clearance.

SETTING END CLEARANCE(Figures E-1 and E-6)

The end clearance between the head (01AA) andthe face of the rotor (03A) should be checked andadjusted as required as part of a regular preventivemaintenance schedule, when performance dropsor the pump is disassembled. If disassembled,reassemble the rotor adjusting sleeve kit as pre-viously indicated, then proceed as follows for ad-justment.



Tighten the rotor adjusting sleeve assembly (07A)in the backhead assembly (06A) until the rotor bot-toms against the head, and install the bearing lock-washer (03B) and locknut (03C) as previously de-scribed. See Figure E-6 and mark the rotor adjust-ing sleeve (07AA) at the beveledmark on the back-head (06AA).

BEVELED MARK

ROTOR ADJUSTING SLEEVE (07AA)

BACKHEAD (06AA)

NOTCH

Figure E-6. End Clearance Adjustment

The end clearance between the head (01) and ro-tor shaft (03A) should be set to the dimensionsshown in Table E-1. Each of the notches on the ro-tor adjusting sleeve (07AA) represents approxi-mately 0.002 inch of end clearance. Back off the ro-tor adjusting sleeve assembly (07A) approximately1/2 turn, then turn the sleeve back in until themarkis the appropriate number of notches counter-clockwise of the beveled mark on the backhead toobtain the recommended end clearance.

Tighten the setscrews (GA) until they bottomagainst the backhead (06AA). Rotate the pumpshaft to ensure free rotation. If the rotor binds or

scrapes against the head, back off the rotor adjust-ing sleeve until rotation is free.

DC, DE .004 .008 .004 .010

GC,GF,GH,GJ .004 .006 .008 .006 .008 .010

JG,JJ,JL,JP .004 .006 .008 .010 .006 .008 .010 .012

Dimensions are shown in inches.For Hydraulic Sizes Not Listed, Viscosities Above 250,000, orfor Special Applications, Consult Your Local Gorman-RuppDistributor or the Factory.

750 2500 25,000 250,000 750 2500 25,000 250,000

225 225 225 225 400 400 400 400

Max. Visc. (SSU)

Max. Temp. (____F)HYD. SIZE

Notes:

Table E-1. End Clearance

RELIEF VALVE DISASSEMBLY(Figure E-7)

NOTEIf the relief valve is low pressure, it will have one in-ternal spring (10AE). If the relief valve is high pres-sure, it will have two internal springs (10AE and10AF).

Unscrew the cap (10AN) from the bonnet (10AK)and remove the gasket (10AP). Back off the adjust-ment capscrew (10AM) to relieve pressure on thespring(s) (10AE and/or 10AF).

Unscrew the bonnet from the valve body (10AA).Remove the valve (10AD) and spring(s) (10AEand/or 10AF). The spring guide (10AH) is anO-ring fit inthe bonnet. Remove and discard the O-rings.

If the warning plate (10AB) must be replaced, re-move the drive screws (BM), and remove the plate.



INCHESDIMENSION “A”(SEE TABLE E-2)

10AA VALVE BODY10AB WARNING PLATE10AD POPPET10AE SPRING10AF SPRING (OPTIONAL)10AH SPRING GUIDE10AJ GASKET (OPTIONAL)10AK BONNET10AMCAPSCREW10AN CAP10AP CAP GSKT (OPTIONAL)10AR TAG (OPTIONAL)D JAM NUTO O-RINGBM DRIVE SCREW

PARTS KEY

ASSEMBLED VIEW

Figure E-7. Pressure Relief Valve Assembly

RELIEF VALVE REASSEMBLY

(Figure E-7)

Do not return the pump to service with-out the warning plate (10AB) installed.Failure to observe the warning on theplate could result in destruction of thepump, and injury or death to personnel.

Inspect the components for wear, grooves, orother damage that might cause leakage. If anycomponents are worn, replace the defective parts.

If removed, attach the warning plate (10AB) to thevalve body (10AA) using the drive screws (BM).

If used, lightly oil the O-ring (O) and install it in thegroove on the bonnet (10AK).

Lightly oil the O-ring (O) and install it in the grooveon the spring guide (10AH). Start the large end ofthe spring guide into the bonnet (10AK), and pushthe guide in until it bottoms out.

Insert the valve (10AD), finned end first, into thevalve body (10AA). Install the spring(s) (10AE and/or 10AF). Make certain that the spring (10AE) fitsover the spring guide (10AH), and the optionalspring (10AF) fits into the guide, and thread thebonnet into the valve body.

Install the jam nut (D) on the adjustment capscrew(10AM), and thread the capscrew into the bonnetuntil the desired height (“A”, Figure E-7) is reached.Refer to the separate Parts List accompanyingyour pump, and determine the specific hydraulicsize (D, G or J). See Table E---2 and adjust thecapscrew (10AM) to the proper “A” dimension fordesired cracking pressure.

Never operate the pump without the ad-justing screw jam nut in place. Other-wise, the relief valve spring(s) can becompressed too far for the valve toopen. If the valve does not open, exces-sive pressure can develop, causingdamage to the pumpand possible injuryto personnel.



50 MIN. 1.17 FULLY OUT

100 .93

125 .83

150 .72

175 .61

200 .50

240 MAX. .31 FULLY IN

30 MIN. 1.17 FULLY OUT

50 .88

75 .57


100 MIN. .60 FULLY OUT

125 .51

150 .42

175 .33

200 .23


CRACKINGPRESSURE(PSI)

DCDEGCGFGHGJ

PUMPHYDRAULICSIZE**

SINGLESPRING

OPTION CODE

DOUBLESPRING

OPTION CODE

DIMENSION“A” (INCHES)Fig. E-7)

CRACKINGPRESSURE(PSI)

50 MIN. .60 FULLY OUT

75 .47

100 .33


DIMENSION“A” (INCHES)Fig. E-7)

STD

25D

25G

25J

25S

25U

STD

25D

25G

25J

25S

25U

25A

25E

25H

25K

25T

25V

25A

25E

25H

25K

25T

25V

JGJJJLJP

Table E-2 . Cracking (Valve Opening) Settings ( Denotes Factory Setting)** See PUMP MODEL DESIGNATION in INSTALLATION, Section B to Identify Hydraulic Size

After adjustment, tighten the jam nut (D) flushagainst the bonnet.

Place the optional warning tag (10AR) between thebonnet and the cap (10AN). Install the cap, andtighten until fully seated against the bonnet.

Relief Valve (10) Installation

Lubricate and install the O-ring(s) (O) on the hous-ing assembly (04A) or the head assembly (01A).Secure the relief valve (10A) with the capscrews(B).

Do not return the pump to service with-out the warning plate (10AB) installed.Failure to observe the warning on theplate could result in destruction of thepump, and injury or death to personnel.

If the warning plate (10AB) has been removed, se-cure it with the drive screws (BM).


PAGE F -- 1SEAL APPENDIX

SEAL APPENDIX --- SECTION F

03 ROTOR/SHAFT ASSY03B BRG LOCKWASHER03C BRG LOCK NUTN SHAFT KEY05 SEAL ASSEMBLY06A BACKHEAD ASSYP PIPE PLUG07AA ROTOR ADJ SLEEVE07AB SEAT SLEEVE07AC BALL BEARING07AD BEARING RET NUTGA SETSCREWO O-RING

PARTS KEY

ASSEMBLED VIEW

Figure F-1. Standard Friction Drive And Optional 60A, 60B And 61J Mechanical Seals

OM--04352GHC SERIES

PAGE F -- 2 SEAL APPENDIX

Seal Removal

(Figures E-1 and F-1)

See PUMP DISASSEMBLY and disassemble thepump up to and including the Rotor AdjustingSleeve (07). As the rotor adjustingsleeve (07AA) isunscrewed from the backhead (06AA), the sealstationary element will remain inside the seatsleeve (07AB).

Remove the seal stationary element and O-ringfrom the seat sleeve. Use caution not to damagethe stationary element sealing face.

Use a screwdriver to pry the seat sleeve (07AB) offthe O.D. of the bearing retaining nut (07AD). Re-move the seat sleeve O-ring (O).

With the head kit (01), idler assembly (02) and rotoradjusting sleeve (07) removed, push the rotor/shaft assembly (03A) toward the head end of thepump until the seal between the shaft and rubberbellows of the seal breaks loose. Slide the rotor/shaft back into the housing until the rotating por-tion of the seal can be grasped. Hold the seal whilesliding the rotor/shaft assembly toward the headend of the pump until the seal slides completely offthe shaft.

Continue as required with PUMP DISASSEMBLY.

Seal Installation

(Figures E-1 and F-1)

See PUMP REASSEMBLY and reassemble thehousing assembly (04), backhead kit (06) and ro-tor/shaft assembly (03).

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 flame, sparks, andexcessive heat. Read and follow all pre-cautions printed on solvent containers.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 anold seal in an emer-gency, carefully wash all metallic parts in freshcleaning solvent and allow to dry thoroughly.

Seal components must be kept clean.Handle seal parts with extreme caution toprevent damage. Use care not to contami-nate the precision-finished faces; even fin-gerprints on the faces can shorten seal life.If necessary to clean the faces, use a cleancloth and wipe in a circular pattern.

Inspect the seal components for wear, scoring,grooves, and other damage that might cause leak-age. If any components are worn, replace the com-plete seal; never mix old and new seal parts.

If a replacement seal is being used, unwrap

New INSTALLATION, OPERATION, AND MAINTENANCE MANUAL · 2020. 4. 24. · GHC SERIES OM--04352 SAFETY...

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Transcript of New INSTALLATION, OPERATION, AND MAINTENANCE MANUAL · 2020. 4. 24. · GHC SERIES OM--04352 SAFETY...