GORMAN-RUPP PUMPS GHC SERIES User manual

OM---04352---01
September 2, 1996
TVXY
THE GORMAN-RUPP COMPANY MANSFIELD, OHIO
GORMAN-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 SERIES
IRON AND STEEL
PUMPS

TABLE OF CONTENTS
i
INTRODUCTION PAGE I --- 1...................................................
S A F E T Y --- S E C T I O N A PA G E A --- 1............................................
I N S T A L L A T I O N --- S E C T I O N B PA G E B --- 1.....................................
GENERAL INFORMATION PAGE B---1......................................................
PUMP MODEL DESIGNATION PAGE B---1..................................................
PREINSTALLATION INSPECTION PAGE B ---2................................................
STORAGE PA G E B --- 2....................................................................
Flushing PA G E B --- 2..................................................................
PUMP INSTALLATION PAGE B--- 3..........................................................
Lifting PA G E B --- 3.....................................................................
Po s i t io n i n g T h e P u m p PA G E B --- 3......................................................
Mounting PA G E B --- 3.................................................................
Piping PA G E B --- 3....................................................................
Gauges PA G E B --- 4...................................................................
Strainers PA G E B --- 4..................................................................
Sealing PA G E B --- 4...................................................................
Valves PA G E B --- 4....................................................................
Barrier Liquids for Dual Seals PAGE B---4................................................
ALIGNMENT PA G E B --- 5..................................................................
C o u p l e d D r i v e s PA G E B --- 5............................................................
V-Belt Drives PA G E 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...................................................
O P E R A T I O N --- S E C T I O N C PA G E C --- 1.......................................
P U M P O P E R A T I O N PA G E C --- 1............................................................
PRE-OPERATION PAGE C---1..............................................................
Before Starting The Pump PAGE C---1...................................................
Checking Pump Rotation PAGE C---1...................................................
STARTING PA G E C --- 1....................................................................
OPERATION PA G E C --- 2..................................................................
L i q u i d Te m p e r a t u r e PA G E C --- 2.........................................................
Overheating PA G E C --- 2...............................................................
Checking Gauges PAGE C---2..........................................................
Strainer Check PAGE C---2.............................................................
Leakage PA G E C --- 3..................................................................
PRESSURE RELIEF VALVE ADJUSTMENT PAGE C---3........................................
Cracking Pressure PAGE C---3.........................................................
Complete By-Pass Pressure PAGE C---3.................................................
STOPPING PA G E C --- 3....................................................................
T R O U B L E S H O O T I N G --- S E C T I O N D PA G E 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...............................
P U M P D I S A S S E M B LY PA G E 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........................................................
H e a d / I d l e r K i t PA G E 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...................................................
R E L I E F VA LV E D I S A S S E M B LY PA G E E --- 1 1.................................................
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.............
StandardLip(AndOptional65C)Seal PAGEF---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 -- 1
INTRODUCTION
INTRODUCTION
Thank You for purchasing a Gorman-Rupp Rotary
Gear Pump. This manual is designed to help you
achieve the best performance and longest life from
your Gorman-Rupp Rotary Gear pump. Read this
manual carefully to learn how to safely install, op-
erate and repair your pump. Failure to do so could
result in personal injury or damage to the pump.
This manual will alert personnel to known proce-
dures which require special attention, to those
which could damage equipment, and to those
which 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 this
manual are performed only after establishing that
neither personal safety nor pump integrity are
compromised by such applications or procedures.
In addition to this manual, a separate Parts List is
shipped with the pump. Refer to the Parts List when
ordering parts.
If your pump is furnished with a drive unit, refer to
the drive unit manufacturer’s installation and oper-
ation instructions in the literature accompanying
the pump.
These pumps can transfer a wide range of light,
medium, and heavy viscosity liquids, depending
on design and components. Some models are
not recommended for use with water; others
when fitted with specific options, may be used
with water; consult the factory.
If there are any questions regarding the pump or
drive unit which are not covered in this manual or
in other literature accompanying this unit, please
contact your Gorman-Rupp distributor or the Gor-
man-Rupp Company:
The Gorman-Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901--1217
or:
Gorman-Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
RECORDING MODEL AND
SERIAL NUMBERS
Please record the pump model and serial number
in the spaces provided below. Your Gorman-Rupp
distributor needs this information when you require
parts or service.
Pump Model:
Serial Number:
WARRANTY INFORMATION
The warranty provided with your pump is part of
Gorman-Rupp’s support program for customers
who operate and maintain their equipment as de-
scribed in this and the other accompanying litera-
ture. Please note that should the equipment be
abused 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 which
could damage equipment, and to those which could be dangerous to personnel:
Immediate hazards which will result in
severe personal injury or death. These
instructions describe the procedure re-
quired and the injury which will result
from failure to follow the procedure.
Hazards or unsafe practices which
COULD result in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result from failure to follow
the procedure.
Hazards or unsafe practices which COULD
result in minor personal injury or product or
property damage. These instructions de-
scribe the requirements and the possible
damage which could result from failure to
follow the procedure.
NOTE
Instructions to aid in installation, operation, and
maintenance or which clarify a procedure.

GHC SERIES OM--04352
PAGE A -- 1
SAFETY
SAFETY --- SECTION A
This information is specific to Gorman-Rupp GHC
Series Rotary Gear Pumps. It applies throughout
this 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 this
pump.
Pumps and related equipment must be in-
stalled and operated according to all na-
tional, local and industry standards.
This manual will alert personnel to
known procedures which require spe-
cial attention, to those which could
damage equipment, and to those which
could be dangerous to personnel. How-
ever, this manual cannot possibly pro-
vide detailed instructions and precau-
tions for each specific application or for
every situation that might occur during
maintenance of the unit. Therefore, it is
the responsibility of the owner, installer
and/or maintenance personnel to en-
sure that applications and/or mainte-
nance procedures not addressed in this
manual are performed only after estab-
lishing that neither personal safety nor
pump integrity are compromised by
such applications or procedures.
Before attempting to install, operate, or
service this pump, familiarize yourself
with this manual, and with all other liter-
ature shipped with the pump. Unfamil-
iarity with all aspects of pump operation
covered in this manual 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 fitted
with different seals. Do not apply at
higher temperatures that the seal will
handle. Do not attempt to pump liquids
which may damage the pump or endan-
ger personnel as a result of pump fail-
ure; consult the factory for chemical
compatibility.
If the pump and motor are furnished
mounted on a base, make certain that all
lifting devices have adequate capacity.
If chains or cables are used in lifting,
make certain that they are positioned so
as not to damage components, and so
that the load will be balanced.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are secure before op-
eration. Loose connections can result in
damage to the equipment and serious
injury to personnel.
Never operate the pump without a pres-
sure relief valve installed on the pump
or in the discharge piping. Make certain
that pump-mounted pressure relief

OM--04352 GHC SERIES
PAGE A -- 2 SAFETY
valves are installed with their adjusting
ends toward the suction port.Ifbi-rota-
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-
erly installed relief valve could cause
the pump to explode, resulting in seri-
ous injury or death to personnel.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man-
ual.
2. Lock out incoming power to the
drive unit to ensure that the pump
will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Close the discharge and suction
valve (if used).
An overheated pump can cause severe
burns and injury. If overheating occurs:
1. Stop the pump immediately.
2. Allow the pump to completely cool.
3. Refer to the instructions in this
manual before restarting the
pump.
Do not remove plates, covers, gauges,
pipe plugs or fittings from an over-
heated pump. Vapor pressure within the
pump can cause parts being disen-
gaged to be ejected with great force. Al-
low the pump to completely cool before
servicing.
Do not operate this pump without
guards in place over the rotating parts.
Exposed rotating parts can catch cloth-
ing, fingers or tools, causing severe in-
jury to personnel.

GHC SERIES OM--04352
PAGE B -- 1
INSTALLATION
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, this
section is intended only to summarize general rec-
ommendations and practices required to inspect,
position, and arrange the pump and piping. If there
are any questions concerning your specific instal-
lation, contact your Gorman-Rupp distributor or
the Gorman-Rupp Company.
Most of the information applies to a flooded suction
installation where liquid is supplied under pres-
sure.
If the pump is positioned above the liquid in a static
lift installation, information such as mounting, pip-
ing configuration and priming must be tailored to
specific conditions.
Thesepumpsarenotrecommendedfor
usewithwater.Somemodelswhenfitted
with specific options may be used with wa-
ter; consult the factory.
PUMP MODEL DESIGNATION
Following is a description of the model numbering
system for Gorman-Rupp rotary gear pumps.
Rotary gear pump model numbers include design
style, port size, hydraulic size and construction
code.
Typical Pump Model
GHS 1 1/2 GF 32
Design
Style
Port
Size
Hydraulic
Size
Construction
Code
Design Style: Gorman-Rupp rotary gear pumps
are available in five basic designs:
SG M C --- M e d i u m D u t y --- C o m p a c t
SG M S --- M e d iu m D u t y
SG H C --- H e a v y D u t y --- C o m p a c t
SG H S --- H e a v y D u t y
SG H A --- A b r a s i v e D u t y
Port Size: Gorman-Rupp rotary gear pumps are
available 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 size
is 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)
4Ironw/PackingorLipSeal(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 indicates
theoretical displacement values for each hydraulic
size.
NOTE
Actual capacities and recommended shaft speeds
vary according to application. Consult your Gor-
man-Rupp distributor or the factory for addtional in-
formation.

GHC SERIESOM--04352
PAGE B -- 2 INSTALLATION
Ta b l e B - 1 . T h e o r e t i c a l D i s p l a c e m e n t
Hydraulic
Size
Theoretical Displacement
Per Revolution
Gallons Centimeters3
DC 0.00568 21.486
DE 0.00704 26.646
GC 0.00967 36.619
GF 0.01405 53.186
GH 0.01915 72.479
GJ 0.02317 87.700
JG 0.03579 135.49
JJ 0.05159 195.28
JL 0.07078 267.94
JP 0.10078 381.48
NK 0.10665 403.71
NM 0.14173 536.51
NP 0.17681 669.31
RM 0.24030 909.65
RP 0.29979 1134.8
RR 0.35927 1360.0
RS 0.41876 1585.1
SR 0.65752 2489.0
SU 1.10240 4173.2
TU 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. Since
gaskets tend to shrink after drying, check for
loose hardware at the mating surfaces.
c. Carefully read all tags, decals, and markings
on the pump assembly, and perform all duties
indicated.
STORAGE
Due to the extreme close machining toler-
ances within rotary gear pumps, proper
storage before installation is essential to
prevent damage to the pump.
If the pump will not be immediately installed, follow
these procedures or damage to the pump will oc-
cur.
a. Do not flush the pump. Ensure that the port
plugs shipped with the pump remain in place
until piping is installed to help prevent dust or
other foreign objects from entering the pump.
b. Pumps that will not be installed for an ex-
tended period should be stored indoors if
possible. The factory-installed port plugs will
not ensure protection from excessive humid-
ity, splash water or rain. In very humid or wet
conditions, install air-tight plugs in the ports
and fill the pump completely with a lubricating
preservative liquid that is compatible with the
liquid to be pumped.
c. Pumps stored outdoors must be fully pre-
served as described above, completely cov-
ered with plastic or other water-tight material,
and the covering anchored to ensure that it
will not be blown off.
Flushing
Clean piping is essential because of close-
tolerance moving parts in this pump. Flush
all dirt, grit, weld beads or scale from the
suction piping before installing the pump.
Damage to the pump because of debris in
the suction line is not covered by the pump
warranty.
Before shipment, the pump may have been tested
using a petroleum-based preservative. If flushing is
required, do not do so until just before installation;
the test oil protects close-tolerance pump parts
from corrosion.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from flame, sparks, and
excessive heat. Read and follow all pre-
cautions printed on solvent containers.

GHC SERIES OM--04352
PAGE B -- 3
INSTALLATION
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 separate
Pump Specification Bulletin.
Never operate the pump without a pres-
sure relief valve installed on the pump
or in the discharge piping. Make certain
that pump-mounted pressure relief
valves are installed with their adjusting
ends toward the suction port.Ifbi-rota-
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-
erly installed relief valve could cause
the pump to explode, resulting in seri-
ous injury or death to personnel.
Lifting
Remove suction and discharge hose and piping
before attempting to lift the pump. Use liftingequip-
ment with a capacity of at least five times the total
weight of the equipment being lifted.
Positioning The Pump
Locate the pump as close as possible to the liquid
being pumped. Locating the pump below the liq-
uid source will help self-priming and reduce the
possibility of cavitation.
Mounting
The pump may be shipped alone, mounted on a
base, or with pump and motor mounted on a base.
Install the pump and motor on a base before
mounting the base on a foundation.
Mount the base on a foundation that will provide
permanent, rigid support for the pump, and will be
heavy enough to absorb any vibration, strain or
shock.
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 pipe may be used to make con-
nections. If rigid piping is used, install expansion
joints to protect the pump from vibration and ther-
mal expansion in the piping. Do not use expansion
joints or flexible connectors to adjust misaligned
piping.
Begin piping layout at the pump, and work toward
the source of supply and the point of discharge. If
an obstacle is in the way of a suction or discharge
line, run the piping around the obstruction, not
over it. Running piping over an obstruction will
creat an air pocket which will make priming more
difficult.
If possible, slope the piping toward the pump so no
air 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 to
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.
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