GORMAN-RUPP GHA SERIES Installation, Operation And Maintenance Manual
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GORMAN-RUPP GHA SERIES Installation, Operation And Maintenance Manual

Rotary gear pumps
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OM−04621−04
March 3, 2004
Rev. F 06-16-06
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
ROTARY GEAR PUMPS
MODELS
GHA SERIES
G,J,N & R SIZE PUMPS
THE GORMAN-RUPP COMPANY MANSFIELD, OHIO
www.grpumps.com
GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA
Printed in U.S.A.
Copyright by the Gorman-Rupp Company

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  • Page 1 Rev. F 06-16-06 INSTALLATION, OPERATION, AND MAINTENANCE MANUAL ROTARY GEAR PUMPS MODELS GHA SERIES G,J,N & R SIZE PUMPS THE GORMAN-RUPP COMPANY MANSFIELD, OHIO www.grpumps.com GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA Printed in U.S.A. Copyright by the Gorman-Rupp Company...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ........... PAGE I −...
  • Page 3 ....PAGE E − 1 PARTS KEY: Typical GHA Series G, J, N & R Size Pumps (Oil Lubricated Backhead Models) ..PAGE E−3 PUMP DISASSEMBLY .

  • Page 4: Introduction

    GHA SERIES OM−04621 INTRODUCTION Thank You for purchasing a Gorman-Rupp Rotary on design and components. Some models are Gear Pump. This manual is designed to help you not recommended for use with water; others achieve the best performance and longest life from when fitted with specific options, may be used your Gorman-Rupp Rotary Gear pump.
  • Page 5 OM−04621 GHA SERIES The following are used to alert personnel to procedures which require special attention, to those which could damage equipment, and to those which could be dangerous to personnel: Immediate hazards which will result in Hazards or unsafe practices which COULD severe personal injury or death.

  • Page 6: Safety − Section A

    GHA SERIES OM−04621 SAFETY − SECTION A This information is specific to Gorman-Rupp GHA covered in this manual could lead to de- Series Rotary Gear Pumps. It applies throughout struction of equipment, injury, or death. this manual and any manual or literature ac- companying the pump.
  • Page 7 OM−04621 GHA SERIES tional operation is required, a pressure relief device must be provided for both directions of flow. Operation without a pressure relief valve or with an improp- Do not remove plates, covers, gauges, erly installed relief valve could cause...

  • Page 8: Installation − Section Bpage B

    − Heavy Duty the Gorman-Rupp Company. − Abrasive Duty Port Size: Gorman-Rupp rotary gear pumps are Most of the information applies to a flooded suction available in port sizes from 1 to 6 inches, depend- installation where liquid is supplied under pres- ing on the design style.

  • Page 9: Preinstallation Inspection

    OM−04621 GHA SERIES Table B-1. Theoretical Displacement If the pump will not be immediately installed, follow these procedures or damage to the pump will oc- cur. Theoretical Displacement Hydraulic Per Revolution a. Do not flush the pump. Ensure that the port...

  • Page 10: Pump Installation

    GHA SERIES OM−04621 NOTE Lifting Simple flushing of the wetted end of the pump to re- Remove suction and discharge hose and piping move test liquid may not be sufficient to thoroughly before attempting to lift the pump. Use lifting equip- clean the seal cavity.

  • Page 11: Temperature Control

    OM−04621 GHA SERIES keep the piping full of liquid. This will make priming easier because the pump will not have to remove as much air in the line. Liquid used for temperature control must not exceed 600 _F (316 _C) or 150 Housing Position For Std.

  • Page 12: Barrier Liquids For 65E Cartridge Triple Lipseal

    GHA SERIES OM−04621 can be valved off or isolated; this will protect piping that can be applied depends primarily on the maxi- against damage from liquid thermal expansion or mum seal design pressure (consult the factory). contraction from temperature changes during Do not pressurize tandem seals.

  • Page 13: V-Belt Drives

    OM−04621 GHA SERIES Align non-spider type couplings by using a feeler gauge or taper gauge between the coupling halves every 90_. The coupling is in alignment when the hubs are the same distance apart at all points (see Figure B-3).

  • Page 14: Tension Measurement

    Belt Span To use the Gorman-Rupp tensioner, measure the belt span as shown in Figure B-5. Position the bot- tom of the large O-ring on the span scale of the ten- sioner at the measured belt span.
  • Page 15 OM−04621 GHA SERIES Table B-2. Sheave Diameter (In.) Table B-3. Sheave Diameter (Mm.) Deflection Force (Lbs.) Deflection Force (Kg.) Belt Deflection Force Belt Deflection Force Uncogged Cogged Uncogged Cogged Hy-T Belts & Torque-Flex Hy-T Belts & Torque-Flex Uncogged & Machined Uncogged &...

  • Page 16: Electrical Connections

    GHA SERIES OM−04621 ELECTRICAL CONNECTIONS Before connecting an electric motor to incoming power, check that the electrical service available matches the pump motor requirements stamped Do not install and operate a non-explo- on the motor nameplate. sion proof motor in an explosive atmo- sphere.

  • Page 17: Operation − Section C

    GHA SERIES OM−04621 OPERATION − SECTION C Review all SAFETY information in Section A. Open all valves in the suction and discharge lines, and close all drain valves. Follow the instructions on all tags, labels and decals attached to the pump.

  • Page 18: Starting

    OM−04621 GHA SERIES If the pump still does not deliver after consulting TROUBLESHOOTING and venting the discharge line, contact your local Gorman-Rupp Rotary Gear Distributor or the factory. Gorman-Rupp rotary gear pumps are bi- OPERATION directional; however, the pumps are...

  • Page 19: Checking Gauges

    GHA SERIES OM−04621 Checking Gauges pump to completely cool before attempt- ing any adjustments. Monitor vacuum and pressure gauge readings to ensure that the pump is operating within normal Cracking Pressure range and delivering full flow. Strainer Check Cracking pressure is the pressure at which the...
  • Page 20 GHA SERIES OM−04621 TROUBLESHOOTING − SECTION D Review all SAFETY information in Section A. Before attempting to open or service the pump: 1. Familiarize yourself with this manual. 2. Allow the pump to completely cool if overheated. 3. Check the temperature before open- ing any covers, plates, or plugs.
  • Page 21 OM−04621 GHA SERIES TROUBLESHOOTING CHART TROUBLE POSSIBLE CAUSE PROBABLE REMEDY Internal clearance too great. PUMP FAILS Check and readjust clearance if re- quired; see SETTING END CLEAR- TO PRIME OR ANCE in Maintenance and Repair, Sec- LOSES PRIME tion E.
  • Page 22 GHA SERIES OM−04621 TROUBLESHOOTING CHART (Cont.) TROUBLE POSSIBLE CAUSE PROBABLE REMEDY PUMP RE- Pump and/or drive mounting not Tighten mounting hardware; realign QUIRES secure; drive misaligned. drive. TOO MUCH POWER Power source undersized. Check power requirements for applica- (Cont.) tion; resize as required.
  • Page 23 Gorman-Rupp rotary gear pump. For specific If the pump is equipped with a backhead bearing questions concerning your application, contact (heavy duty models), inspect for free rotation of the...
  • Page 24 GHA SERIES OM−04621 Preventive Maintenance Schedule Service Interval* Item Daily Weekly Monthly Semi- Annually Annually General Condition (Temperature, Unusual Noises or Vibrations, Cracks, Leaks, Loose Hardware, Etc.) Pump Performance (Gauges, Speed, Flow) Bearings Seal Lubrication (And Packing Adjustment, If So Equipped)
  • Page 25 Below the pump model number on the Parts List is a grouping of several alpha-numeric codes. This code identifies the optional components of the pump. Contact the Gorman-Rupp Company to verify performance and options. The following illustrations cover disassembly and reassembly for the pump models shown below.
  • Page 26 NOTE: Refer to Seal Appendix, Section F for details of the Seal Assembly and Related Components. NOTE: Refer to O-Ring Appendix, Section G for O-ring identification and location. Figure E−1. Typical GHA Series G, J, N & R Size Pumps (Oil Lubricated Backhead Models) PAGE E−2...
  • Page 27 GHA SERIES OM−04621 PARTS KEY FOR FIGURE E-1 Note: Item numbers cross reference to specific part numbers on the separate Parts List. ITEM PART NAME ITEM PART NAME HEAD KIT −GASKET −HEAD ASSEMBLY −SOCKET HD CAPSCREW 01AA −HEAD ROTOR ADJUSTING SLEEVE KIT 01AB −IDLER PIN...
  • Page 28 OM−04621 GHA SERIES PUMP DISASSEMBLY AND and/or maintenance personnel to en- sure that applications and/or mainte- REASSEMBLY nance procedures not addressed in this manual are performed only after estab- Review all SAFETY information in Section A. lishing that neither personal safety nor...

  • Page 29: Optional Head Jacket

    GHA SERIES OM−04621 pump assembly. Retain all connection parts such pipe wrench or other suitable tool to turn the rotor as shaft keys, etc. adjusting sleeve clockwise (as viewed from the drive end) until the rotor binds against the head.

  • Page 30: Rotor/Shaft Removal (03)

    OM−04621 GHA SERIES parts have sharp edges which will grow 01AA sharper with use. 11AA NOTE The idler bushing (02B) may be damaged during 01AB removal. Do not remove the idler bushing unless re- placement is required. Remove the assembled idler (02) from the head as- sembly.

  • Page 31: Foot Bracket Kit (08)

    GHA SERIES OM−04621 NOTE Backhead Kit (06) Disassembly (Packing Seal or Clamped Seat Seal Options If your pump is equipped with a mechanical seal, Only) part of the primary seal assembly (05) will be re- moved with the rotor/shaft assembly. Refer to Seal...

  • Page 32: Pump Reassembly

    OM−04621 GHA SERIES PUMP REASSEMBLY The adjusting sleeve bearing tolerance provides a light press fit into the rotor adjusting sleeve (07AA). Replace the rotor adjusting sleeve if the proper fit is not achieved. The shaft bearing is a light press fit into the bearing sleeve.

  • Page 33: Rotor/Shaft (03) Installation

    GHA SERIES OM−04621 Install a new gasket (06B) over the throttle bushing sleeve (06AD). Secure the backhead assembly (06A) to the housing (04A) with the capscrews (B). There are two plugs (P) in the back side of Secure the foot bracket (08A) to the backhead as-...

  • Page 34: Optional Head Jacket

    OM−04621 GHA SERIES Coverplate Kit (11) (Figures E-1 and E-3) If your pump is not equipped with a pressure relief valve, the coverplate kit will be mounted on the The pipe plugs (P) must be installed in the head assembly.

  • Page 35: Setting End Clearance

    For Rotor Trim Codes Not Listed or for Special Applications, termined from Tables E-1 or E-2, compare the de- Consult Your Local Gorman-Rupp Distributor or the Factory. sign of your pump to Figures E-5 and E-6, and fol- low the appropriate instructions for adjusting end Table E-2.

  • Page 36: Lubrication

    OM−04621 GHA SERIES (Figures E-1 and E-5) LUBRICATION (Oil Lubricated Backhead Models) Loosen the setscrews (GA) in the rotor adjusting sleeve. Turn the rotor adjusting sleeve (07AA) The backhead was fully lubricated when shipped clockwise until the rotor bottoms against the head from the factory.

  • Page 37: Relief Valve Disassembly

    GHA SERIES OM−04621 Specifications: Type ............

  • Page 38: Relief Valve Installation (10)

    OM−04621 GHA SERIES open. If the valve does not open, exces- damage to the pump and possible injury sive pressure can develop, causing to personnel. PARTS KEY 10AA VALVE BODY 10AB WARNING PLATE 10AD POPPET 10AE SPRING 10AF SPRING (OPTIONAL)
  • Page 39 GHA SERIES OM−04621 PUMP SINGLE CRACKING DIMENSION DOUBLE CRACKING DIMENSION HYDRAULIC SPRING PRESSURE A" (INCHES) SPRING PRESSURE A" (INCHES) SIZE OPTION CODE (PSI) Fig. E-7) OPTION CODE (PSI) Fig. E-7) 100 MIN. .60 FULLY OUT 50 MIN. .60 FULLY OUT...
  • Page 40 OM−04621 GHA SERIES PUMP SINGLE CRACKING DIMENSION DOUBLE CRACKING DIMENSION HYDRAULIC SPRING PRESSURE A" (INCHES) SPRING PRESSURE A" (INCHES) SIZE OPTION CODE (PSI) Fig. E-7) OPTION CODE (PSI) Fig. E-7) 100 MIN. .60 FULLY OUT 45 MIN. .60 FULLY OUT...

  • Page 41: Seal Appendix − Section F

    GHA SERIES OM−04621 SEAL APPENDIX − SECTION F PARTS KEY 03A ROTOR/SHAFT ASSY 03B BRG LOCKWASHER 03C BRG LOCKNUT SHAFT KEY MECH SEAL ASSY LIP SEAL 06A BACKHEAD ASSY 06F OIL HOLE COVER 06AD BEARING SLEEVE 06AE SHAFT NEEDLE BEARING...
  • Page 42 OM−04621 GHA SERIES Seal Removal Handle seal parts with extreme caution to prevent damage. Use care not to contami- (Figures E-1 and F-1) nate the precision-finished faces; even fin- See PUMP DISASSEMBLY and disassemble the gerprints on the faces can shorten seal life.

  • Page 43: Lug Drive (Option 62A And 62B) Mechanical Seals

    GHA SERIES OM−04621 SEAL APPENDIX − SECTION F PARTS KEY 03A ROTOR/SHAFT ASSY 03B BRG LOCKWASHER 03C BRG LOCKNUT SHAFT KEY POS DRIVE SEAL ASSY LIP SEAL 06A BACKHEAD ASSY 06F OIL HOLE COVER 06AD BEARING SLEEVE 06AE SHAFT NEEDLE BEARING...
  • Page 44 OM−04621 GHA SERIES Seal Removal failure. If necessary to reuse an old seal in an emer- gency, carefully wash all metallic parts in fresh cleaning solvent and allow to dry thoroughly. (Figures E-1 and F-1) See PUMP DISASSEMBLY and disassemble the pump up to and including Rotor/Shaft (03) Re- moval.

  • Page 45: Minimum Leak Packing Seal (Option 65S)

    GHA SERIES OM−04621 SEAL APPENDIX − SECTION F PARTS KEY 03A ROTOR/SHAFT ASSY 03B BRG LOCKWASHER 03C BEARING LOCKNUT PACKING SEAL 06A BACKHEAD ASSY 06AF LUBE FITTING 07G SPLIT GLAND SET 07H GLAND RETAINER 07AA ROTOR ADJ SLEEVE 07AC BALL BEARING 07AD BEARING RET CAP 07AJ BRG SPACER (IF REQ’D)
  • Page 46 OM−04621 GHA SERIES Packing Seal Removal (Figures E-1 and F-3) The pump does not need to be disassembled to re- move the packing seal. Loosen the gland locknut (D) and remove the gland retainers (07H, if required) and split gland halves (07G).
  • Page 47 GHA SERIES OM−04621 Some channel-type packing with a lead core may is fully compressed. Add enough packing to fill the require a slight gap between packing rings to allow seat sleeve to within 3/8-inch of the end. for expansion. Consult the packing manufacturer’s...

  • Page 48: Standard Packing Seal

    OM−04621 GHA SERIES SEAL APPENDIX − SECTION F PARTS KEY 03A ROTOR/SHAFT ASSY 03B BRG LOCKWASHER 03C BEARING LOCKNUT SHAFT KEY PACKING SEAL −PACKING RING(S) 05P −LANTERN RING 05S −SLINGER RING 06A BACKHEAD ASSY 06AF LUBE FITTING PIPE PLUG 07AA ROTOR ADJ SLEEVE...
  • Page 49 (see the Parts List accompanying your an angled gap; pressure on adjacent packing pump) be ordered from your Gorman-Rupp distrib- rings will cause them to work into the gap and pre- utor or the factory. However, if bulk commercial...
  • Page 50 OM−04621 GHA SERIES for expansion. Consult the packing manufacturer’s the manufacturer. Generally, swabbing the I.D. of installation instructions and follow the recommen- the packing with SAE No. 30 non-detergent oil pro- dations. vides sufficient lubrication. Lubricate the new packing rings with non-deterg- ent oil before installation.
  • Page 51 GHA SERIES OM−04621 SEAL APPENDIX − SECTION F PARTS KEY 03A ROTOR/SHAFT ASSY 03B BRG LOCKWASHER 03C BEARING LOCKNUT CARTRIDGE SEAL ASSY 06A BACKHEAD ASSY 07AA ROTOR ADJ SLEEVE 07AC BALL BEARING 07AD BEARING RET NUT 07AJ BRG SPACER (IF REQ’D)
  • Page 52 OM−04621 GHA SERIES Seal Removal If a replacement seal is being used, unwrap the mechanical seal components. (Figures E-1 and F-5) Lightly lubricate the seal area of the shaft using a See PUMP DISASSEMBLY and remove the Rotor soft hand soap and water solution, glycerine or sili- Adjusting Sleeve (07).
  • Page 53 GHA SERIES OM−04621 then re-tighten the gland nuts. Repeat the process as required to ensure seal/shaft concentricity. After the seal is properly centered on the shaft, ro- tate the seal centering clips (if so equipped) 90_. Install seal piping as required, or ensure that seal ports are plugged.

  • Page 54: O-Ring Appendix − Section G

    GHA SERIES OM−04621 O-RING APPENDIX − SECTION G Ref. Description Hyd. Dash No. Ref. Description Hyd. Dash No. Size Size Head to 10AG Spring Housing Guide to Bonnet Head Jacket 10AJ Bonnet to to Head Valve Body Housing to Valve or...
  • Page 55 For U.S. and International Warranty Information, Please Visit www.grpumps.com/warranty or call: U.S.: 419−755−1280 International: +1−419−755−1352 For Canadian Warranty Information, Please Visit www.grcanada.com/warranty or call: 519−631−2870 THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA...

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