Page 1
OM-07360-01
September 10, 2020
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
PA SERIES PUMP
MODEL
PA12A60-B-4045H FT4-ESP
GORMAN‐RUPP PUMPS
www.grpumps.com
2020 Gorman‐Rupp Pumps Printed in U.S.A.
Page 2
Register your new
Gorman‐Rupp pump online at
www.grpumps.com
Valid serial number and e‐mail address required.
The engine exhaust from this
product contains chemicals
known to the State of California to
cause cancer, birth defects or
other reproductive harm.
RECORD YOUR PUMP MODEL AND SERIAL NUMBER
Please record your 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:
Page 3
TABLE OF CONTENTS
INTRODUCTION PAGE I - 1.................................................
SAFETY ‐ SECTION A PAGE A - 1............................................
INSTALLATION - SECTION B PAGE B - 1....................................
Pump Dimensions PAGE B - 1.....................................................
PREINSTALLATION INSPECTION PAGE B - 1............................................
Battery Installation PAGE B - 2.....................................................
POSITIONING PUMP PAGE B - 2.......................................................
Lifting PAGE B - 2.................................................................
Mounting PAGE B - 2.............................................................
SUCTION AND DISCHARGE PIPING PAGE B - 3.........................................
Materials PAGE B - 3..............................................................
Line Configuration PAGE B - 3......................................................
Connections to Pump PAGE B - 3..................................................
Gauges PAGE B - 3...............................................................
SUCTION LINES PAGE B - 3...........................................................
Fittings PAGE B - 3...............................................................
Strainers PAGE B - 3..............................................................
Sealing PAGE B - 4...............................................................
Suction Line Positioning PAGE B - 4................................................
DISCHARGE LINES PAGE B - 5........................................................
Siphoning PAGE B - 5.............................................................
Valves PAGE B - 5................................................................
ALIGNMENT PAGE B - 5..............................................................
AUTO‐START PAGE B - 5.............................................................
Float Switch Installation PAGE B - 6.................................................
OPERATION - SECTION C PAGE C - 1......................................
OPERATION PAGE C - 1..............................................................
PRIMING PAGE C - 1.................................................................
STARTING PAGE C - 1................................................................
Manual Starting PAGE C - 1........................................................
Automatic Starting PAGE C - 2.....................................................
OPERATION PAGE C - 2..............................................................
Leakage PAGE C - 2..............................................................
Pump Vacuum Check PAGE C - 2..................................................
Liquid Temperature And Overheating PAGE C - 2.....................................
Strainer Check PAGE C - 2.........................................................
STOPPING PAGE C - 3................................................................
BEARING TEMPERATURE CHECK PAGE C - 3..........................................
Cold Weather Preservation PAGE C - 3..............................................
TROUBLESHOOTING - SECTION D PAGE D - 1..............................
PREVENTIVE MAINTENANCE PAGE D - 3...............................................
PUMP MAINTENANCE AND REPAIR ‐ SECTION E PAGE E - 1.................
STANDARD PERFORMANCE CURVE PAGE E - 1........................................
i
Page 4
TABLE OF CONTENTS
(continued)
PARTS LIST:
Pump Model Assembly PAGE E - 3.................................................
Power Unit Kit PAGE E - 7.........................................................
Pump Model Assembly PAGE E - 11.................................................
Pump Sub- Assembly PAGE E - 13.................................................
Priming Chamber Kit PAGE E - 16...................................................
Priming Chamber Assembly PAGE E - 17.............................................
Engine Drive Assembly PAGE E - 18.................................................
Impeller Assembly Machining Tolerances PAGE E - 19.................................
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E - 20.........................
Priming Chamber Removal And Disassembly PAGE E - 21..............................
Discharge Check Valve Removal and Disassembly PAGE E - 21.........................
Suction Head And Wear Ring Removal PAGE E - 21...................................
Pump Casing Removal PAGE E - 22.................................................
Impeller Removal PAGE E - 22......................................................
Seal Removal PAGE E - 22..........................................................
Pedestal Assembly Removal PAGE E - 23.............................................
Pump Shaft and Bearing Removal and Disassembly PAGE E - 23........................
Engine Drive Disassembly PAGE E - 24..............................................
Bearing Cleaning And Inspection PAGE E - 24........................................
Engine Drive Reassembly PAGE E - 25...............................................
Pump Shaft and Bearing Reassembly and Installation PAGE E - 26......................
Pedestal Assembly Installation PAGE E - 28...........................................
Seal Reassembly and Installation PAGE E - 28........................................
Impeller Installation PAGE E - 30.....................................................
Pump Casing Installation PAGE E - 30................................................
Suction Head And Wear Ring Installation PAGE E - 30..................................
Discharge Check Valve Assembly and Installation PAGE E - 31..........................
Priming Chamber Assembly And Installation PAGE E - 31...............................
LUBRICATION PAGE E - 31.............................................................
Seal Assembly PAGE E - 31.........................................................
Bearings PAGE E - 31..............................................................
Engine PAGE E - 32................................................................
ii
Page 5
PA SERIES
OM-07360
INTRODUCTION
Thank You for purchasing a Gorman‐Rupp pump.
Read this manual carefully to learn how to safely
install and operate your pump. Failure to do so
could result in personal injury or damage to the
pump. This Installation, Operation, and Mainte
nance manual is designed to help you achieve the
best performance and longest life from your Gor
man‐Rupp pump.
This pump is a PA Series, priming‐assisted envi
ronmental silent pump. The centrifugal pump unit
is designed for handling non‐volatile, non‐flam
mable liquids containing specified entrained sol
ids. The basic material of pump construction is
ductile iron, with stainless steel shaft and ductile
iron wearing parts.
Because pump installations are seldom identical,
this manual cannot possibly provide detailed in
structions and precautions for every aspect of
each specific application. Therefore, it is the re
sponsibility of the owner/installer of the pump to
ensure that applications not addressed in this
manual are performed only after establishing that
neither operator safety nor pump integrity are com
promised by the installation. Pumps and related
equipment must be installed and operated ac
cording to all national, local and industry stan
dards.
The following are used to alert personnel to proce
dures 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.
If there are any questions regarding the pump
which are not covered in this manual or in other lit
erature accompanying the unit, please contact
your Gorman‐Rupp distributor or the Gorman‐
Rupp Company:
The Gorman‐Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901-1217
Phone: (419) 755-1011
or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: (519) 631-2870
For information or technical assistance on the en
gine, contact the engine manufacturer's local
dealer or representative.
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.
PAGE I - 1INTRODUCTION
Page 6
PA SERIES
SAFETY ‐ SECTION A
This information applies to Prime Aire
Series pumps. Refer to the manual ac
companying the engine or power
source before attempting to begin oper
ation.
Because pump installations are seldom
identical, this manual cannot possibly
provide detailed instructions and pre
cautions for each specific application.
Therefore, it is the owner/installer's re
sponsibility to ensure that applications
not addressed in this manual are per
formed only after establishing that nei
ther operator safety nor pump integrity
are compromised by the installation.
OM-07360
the positive battery cable before per
forming any maintenance. Failure to do
so may result in serious personal injury.
This pump is designed to handle most
non‐volatile, non‐flammable liquids
containing specified entrained solids.
Do not attempt to pump volatile, corro
sive, or flammable liquids which may
damage the pump or endanger person
nel as a result of pump failure.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man
ual.
2. Shut down the engine and discon
nect the positive battery cable to
ensure that the pump will remain
inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature and make
sure the pump is cool before open
ing any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau
tiously.
7. Drain the pump.
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are tight, properly
supported and secure before operation.
This pump is equipped with an automat
ic starting system, and is subject to au
tomatic restart. Keep hands and cloth
ing away from the unit to prevent injury
during automatic operation. Disconnect
Do not operate the pump against a
closed discharge valve. If operated
against a closed discharge valve, pump
PAGE A - 1SAFETY
Page 7
components will deteriorate, and the
liquid could come to a boil, build pres
sure, and cause the pump casing to rup
ture or explode. Momentary closure of a
discharge valve is acceptable only
when required for startup or shutdown
procedures.
PA SERIESOM-07360
Make sure the pump is level. Lower jack
stands and chock the wheels, if so
equipped. Use caution when positioning
the skid‐mounted unit to prevent damage
to the fuel tank.
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 cool completely before
servicing.
This pump may be used to handle mate
rials which could cause illness through
direct exposure or emitted fumes. Wear
adequate protective clothing when
working on the pump or piping.
Do not operate an internal combustion
engine in an explosive atmosphere.
When operating an internal combustion
engine in an enclosed area, make sure
exhaust fumes are piped to the outside.
These fumes contain carbon monoxide,
a deadly gas that is colorless, tasteless
and odorless.
Fuel used by internal combustion en
gines presents an extreme explosion
and fire hazard. Make certain that all
fuel lines are securely connected and
free of leaks. Never refuel a hot or run
ning engine. Avoid overfilling the fuel
tank. Always use the correct type of fuel.
Never tamper with the governor to gain
more power. The governor establishes
Do not operate the pump without guards
in place over the rotating parts. Ex
posed rotating parts can catch clothing,
fingers or tools, causing severe injury to
personnel.
PAGE A - 2 SAFETY
safe operating limits that should not be
exceeded. Refer to the Performance
Curve in Section, Page E‐1 for the maxi
mum continuous operating speed for
this pump.
Page 8
PA SERIES OM-07360
INSTALLATION - SECTION B
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this
section offers only general recommendations and
practices required to inspect, position, and ar
range the pump and piping.
Most of the information pertains to a standard
static lift application where the pump is positioned
above the free level of liquid to be pumped.
If installed in a flooded suction application where
the liquid is supplied to the pump under pressure,
some of the information such as mounting, line
OUTLINE DRAWING
SUCTION:
12.00 NOMINAL WITH 12 HOLES
1.00/[25,4] DIA EQUALLY SPACED
ON A 17.00/[431,8] DIA BC
15.26
[ 387,7 ]
POWERED BY: JOHN DEERE 4045H FT4 DIESEL ENGINE
40.81
[ 1036,6 ]
configuration, and priming must be tailored to the
specific application. Since the pressure supplied
to the pump is critical to performance and safety,
be sure to limit the incoming pressure to 50% of the
maximum permissible operating pressure as
shown on the pump performance curve.
For further assistance, contact your Gorman‐Rupp
distributor or the Gorman‐Rupp Company.
Pump Dimensions
See Figure 1 for the approximate physical dimen
sions of this pump.
DISCHARGE:
12.00 NOMINAL WITH 12 HOLES
1.00/[25,4] DIA EQUALLY SPACED
33.60
[ 853,5 ]
ON A 17.00/[431,8] DIA BC
DIMENSIONS:
INCHES
[MILLIMETERS]
33.75
[ 857,2 ]
[ 565,2 ]
3.00
[ 76,2 ]
22.25
2.75
[ 69,8 ]
TYP
72.00
[ 1828,8 ]
78.00
[ 1981,2 ]
.69/[17,5] DIA
7 HOLES
EACH END
36.00
[ 914,4 ]
23.50
[ 596,9 ]
12.00
[ 304,8 ]
7.03
[ 178,5 ]
Figure 1. Pump Model PA12A60-B-4045H FT4-ESP
PREINSTALLATION INSPECTION
The pump assembly was inspected and tested be
fore shipment from the factory. Before installation,
inspect the pump for damage which may have oc
curred during shipment. Check as follows:
.12
TYP
[ 3,2 ]
.625−11 TAPPED
16 PLACES
EACH SIDE
26.22
[ 666,0 ]
2.00
[ 50,8 ]
87.97
[ 2234,4 ]
TYP
[ 3505,2 ]
141.50
[ 3594,1 ]
138.00
APPROX
a. Inspect the pump for cracks, dents, damaged
threads, and other obvious damage.
b. Check for and tighten loose attaching hard
ware. Since gaskets tend to shrink after dry
ing, check for loose hardware at mating sur
faces.
102.00
[ 2590,8 ]
APPROX
PAGE B - 1INSTALLATION
Page 9
OM-07360 PA SERIES
c. Carefully read all tags, decals, and markings
on the pump assembly, and perform all duties
indicated. Note that the pump shaft rotates in
the required direction.
Only operate this pump in the direction in
dicated by the arrow on the pump body
and on the accompanying decal. Other
wise, the impeller could become loosened
from the shaft and seriously damage the
pump.
d. Check levels and lubricate as necessary. Re
fer to LUBRICATION in the Maintenance and
Repair Manual and perform duties as in
structed.
e. If the pump has been stored for more than 12
months, some of the components or lubri
cants may have exceeded their maximum
shelf life. These must be inspected or re
placed to ensure maximum pump service.
If the maximum shelf life has been exceeded, or if
anything appears to be abnormal, contact your
Gorman‐Rupp distributor or the factory to deter
mine the repair or updating policy. Do not put the
pump into service until appropriate action has
been taken.
POSITIONING PUMP
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
Lifting
Pump unit weights will vary depending on the
mounting and drive provided. Check the shipping
tag on the unit packaging for the actual weight, and
use lifting equipment with appropriate capacity.
Drain the pump and remove all customer‐installed
equipment such as suction and discharge hoses
or piping before attempting to lift existing, installed
units.
Battery Installation
Unless otherwise specified on the pump order, the
engine battery is not included with engine driven
units.
Refer to the information accompanying the battery
and/or electrolyte solution for activation and charg
ing instructions.
Before installing the battery, clean the positive and
negative cable connectors, and the battery termi
nals. Secure the battery by tightening the
holddown brackets. The terminals and clamps
may be coated with petroleum jelly to retard corro
sion. Connect and tighten the positive cable first,
then the negative cable.
PAGE B - 2 INSTALLATION
Mounting
Locate the pump in an accessible place as close as
practical to the liquid being pumped. Level mount
ing is essential for proper operation. The pump
may have to be supported or shimmed to provide
for level operation and eliminate vibration.
For engine driven units, the pump must be posi
tioned as level as possible to ensure sufficient lubri
cation and fuel supply to the engine.
If the pump has been mounted on a moveable
base, make certain the base is stationary by setting
the brake and blocking the wheels before attempt
ing to operate the pump.
Page 10
PA SERIES OM-07360
to secure them when filled with liquid and under
pressure.
If the pump has been mounted on a mov
able base, do not attempt to operate the
pump unless the unit is level. Be sure
the leveling stands are positioned on a
solid surface, and the wheels are
chocked.
SUCTION AND DISCHARGE PIPING
Pump performance is adversely effected by in
creased suction lift, discharge elevation, and fric
tion losses. See the performance curve and oper
ating range shown on Page E‐1 to be sure your
overall application allows pump to operate within
the safe operation range.
Materials
Either pipe or hose maybe used for suction and
discharge lines; however, the materials must be
compatible with the liquid being pumped. If hose is
used in suction lines, it must be the rigid‐wall, rein
forced type to prevent collapse under suction. Us
ing piping couplings in suction lines is not recom
mended.
Line Configuration
Keep suction and discharge lines as straight as
possible to minimize friction losses. Make mini
mum use of elbows and fittings, which substan
tially increase friction loss. If elbows are necessary,
use the long‐radius type to minimize friction loss.
Connections to Pump
Before tightening a connecting flange, align it ex
actly with the pump port. Never pull a pipe line into
place by tightening the flange bolts and/or cou
plings.
Lines near the pump must be independently sup
ported to avoid strain on the pump which could
cause excessive vibration, decreased bearing life,
and increased shaft and seal wear. If hose‐type
lines are used, they should have adequate support
Gauges
The pump is drilled and tapped for installing dis
charge pressure and vacuum suction gauges. It is
recommended that gauges be installed to monitor
pump performance. Seal the gauge threads with
pipe dope to ensure an airtight seal. Follow the
sealant manufacturer's recommendations when
selecting and applying the pipe dope. The pipe
dope should be compatible with the liquid being
pumped.
SUCTION LINES
To avoid air pockets which could affect pump prim
ing, the suction line must be as short and direct as
possible. When operation involves a suction lift, the
line must always slope upward to the pump from
the source of the liquid being pumped; if the line
slopes down to the pump at any point along the
suction run, air pockets will be created.
Fittings
Suction lines should be the same size as the pump
inlet. If reducers are used in suction lines, they
should be the eccentric type, and should be in
stalled with the flat part of the reducers uppermost
to avoid creating air pockets. Valves are not nor
mally used in suction lines, but if a valve is used,
install it with the stem horizontal to avoid air pock
ets.
Strainers
A strainer or other device should be used to filter
solids larger than the pump's capacity to avoid
damage or decreased performance. Information
about solids size handling can be found on the per
formance curve for your specific pump. When se
lecting or installing a strainer, make certain that the
total area of the openings in the strainer is at least
three or four times the cross section of the suction
line, and the openings will not permit passage of
solids larger than the solids handling capability of
the pump.
PAGE B - 3INSTALLATION
Page 11
OM-07360 PA SERIES
Sealing
Since even a slight leak will affect priming, head,
and capacity, especially when operating with a
high suction lift, all connections in the suction line
should be sealed with pipe dope to ensure an air
tight seal. Follow the sealant manufacturer's rec
ommendations when selecting and applying the
pipe dope. The pipe dope should be compatible
with the liquid being pumped.
Suction Lines In Sumps
If a single suction line is installed in a sump, it
should be positioned away from the wall of the
sump at a distance equal to 1 1/2 times the diame
ter of the suction line.
If there is a liquid flow from an open pipe into the
sump, the flow should be kept away from the suc
tion inlet because the inflow will carry air down into
the sump, and air entering the suction line will re
duce pump efficiency.
If it is necessary to position inflow close to the suc
tion inlet, install a baffle between the inflow and the
suction inlet at a distance 1‐1/2 times the diameter
of the suction pipe. The baffle will allow entrained
air to escape from the liquid before it is drawn into
the suction inlet.
If two suction lines are installed in a single sump,
the flow paths may interact, reducing the efficiency
of one or both pumps. To avoid this, position the
suction inlets so that they are separated by a dis
tance equal to at least 3 times the diameter of the
suction pipe.
Suction Line Positioning
The depth of submergence of the suction line is
critical to efficient pump operation. Figure 2
shows recommended minimum submergence vs.
velocity.
Although not recommended, the vacuum assisted
priming feature allows the pump to be operated
temporarily in a “slurping” application with varying
water levels.
NOTE
The pipe submergence required may be reduced
by installing a standard pipe increaser fitting at the
end of the suction line. The larger opening size will
reduce the inlet velocity. Calculate the required
submergence using the following formula based
on the increased opening size (area or diameter).
PAGE B - 4 INSTALLATION
Page 12
PA SERIES OM-07360
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
DISCHARGE LINES
Siphoning
Do not terminate the discharge line at a level lower
than that of the liquid being pumped unless a si
phon breaker is used in the line. Otherwise, a si
phoning action causing damage to the pump
could result.
Valves
This pump is designed with a check valve in the
discharge line.
If a throttling valve is desired in the discharge line,
use a valve as large as the largest pipe to minimize
friction losses. Never install a throttling valve in a
suction line.
With high discharge heads, it is recommended that
a throttling valve be installed in the discharge line
to protect the pump from excessive shock pres
sure and reverse rotation when it is stopped.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
ALIGNMENT
The alignment of the pump, air compressor and
engine is critical for trouble‐free mechanical opera
tion. See Section E, Securing Intermediate And
Drive Assembly To Engine in MAINTENANCE
AND REPAIR, for details.
AUTO‐START
The standard pump is equipped with an auto‐start
control system which allows the pump to start and
stop as the liquid level in the wet well or sump rises
and falls.
Refer to the information which follows for installa
tion details for the liquid level sensing system pro
vided with your pump.
PAGE B - 5INSTALLATION
Page 13
OM-07360 PA SERIES
Float Switch Installation
The Float Switch autostart system employs either a
single or double float switch, where a bulb raises or
lowers (floats) with the liquid level, thus activating
an enclosed miniature switch. The floats are
equipped with a socket type connector that plugs
into a matching receptacle on the auto‐start control
box.
Standard floats are equipped with 50 feet (15,2 m)
of cable.
When installing the floats, note the following:
a. Be sure to provide sufficient room in the wet
well or sump so that floats do not get ob
structed or drawn into the suction line. If a flex
ible suction hose is used, it may be extended
to lay along the bottom of the wet well or sump
and the float can be attached to the hose
above the point where it bends along the bot
tom. Direct the suction line toward the flow,
and the float(s) away from the flow. If a stand
pipe is available, attach the float switch cable
to the standpipe in the sump at the approxi
mate desired liquid level.
b. In a single float system, the cable can be teth
ered to the suction line or standpipe approxi
mately 6 inches (152 mm) above the float.
This setting allows approximately 9 inches
(229 mm) of liquid rise between pump start/
stop. The start/stop interval may be increased
by extending the float end of the cable. The
liquid level in the sump will increase approxi
mately 8 inches (203 mm) between start/stop
intervals for every 6 inches (152 mm) of cable
increase.
c. If a double float switch system is used, posi
tion the “Start” float at the desired high water
level in the sump, and the “Stop” float at the
desired low water level in the pump.
d. Refer to Figure 3 for additional float switch
data.
ENGINE
CONTROL
BOX
ON
(Emptying)
OFF
(Filling)
OPERATING
CABLE
TETHER
RANGE
(See Table Below)
POINT
OFF
(Emptying)
1.25” Pipe
(Not Furnished)
ON
(Filling)
Figure 3. Float Switch Data
COLD WEATHER INSTALLATION
If the pump is to be installed in an environment
where sub‐freezing temperatures will occur during
operation, consideration must be given to prevent
the pump and components from freezing when the
pump is idle between pumping cycles. With Gor
man‐Rupp priming assisted pumps, there are two
methods of accomplishing this.
3.0
(0.9)
2.5
(.76)
2.0
(0.6)
1.5
(.46)
1.0
(0.3)
0.5
(.15)
1.0
(0.3)
APPROXIMATE FREE CORD LENGTH IN FT. (M)
2.0
(0.6)
3.0
(0.9)
4.0
(1.2)
One method is through the use of an optional heat
ed priming chamber, which is available as a facto
ry‐installed option or as a retrofit kit for most mod
els (consult the factory). This method pumps heat
ed liquid from the engine cooling system through
the priming chamber to heat the chamber and its
contents. This method is particularly effective
where pumping cycles are short enough to ensure
PAGE B - 6 INSTALLATION
Page 14
PA SERIES OM-07360
that the liquid in the priming chamber never fully
freezes.
The second method involves configuring the
pumping system to drain both the priming cham
ber and pump casing after each pumping cycle.
With no liquid remaining in the system, freezing
cannot occur.
To configure the pump to drain between pumping
cycles, the first step is to remove the check valve
from the line that runs between the top of the prim
ing hopper and the priming venturi. This check
valve is located close to the venturi end of the line.
Remove the check valve, then reconnect the line
directly to the venturi. This will allow air to enter the
pump through the top of the priming hopper when
the pump shuts off, providing for complete
drainage of the pump and priming hopper.
PAGE B - 7INSTALLATION
Page 15
PA SERIES
OM-07360
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
Do not operate an internal combustion
engine in an explosive atmosphere.
When operating an internal combustion
engine in an enclosed area, make sure
exhaust fumes are piped to the outside.
These fumes contain carbon monoxide,
a deadly gas that is colorless, tasteless
and odorless.
OPERATION
This pump is designed to handle most
non‐volatile, non‐flammable liquids
containing specified entrained solids.
Do not attempt to pump volatile, corro
sive, or flammable liquids which may
damage the pump or endanger person
nel as a result of pump failure.
Pump speed and operating condition
points must be within the continuous per
formance range shown on the perfor
mance curve in Section E on page E-1.
PRIMING
Install the pump and piping as described in IN
STALLATION. Make sure that the piping connec
tions are tight, and that the pump is securely
mounted. Check that the pump is properly lubri
cated (see LUBRICATION in MAINTENANCE
AND REPAIR).
The pump will begin to prime upon startup. The air
in the suction line will be discharged from the educ
tor discharge line. Complete priming is indicated
by a positive discharge pressure reading.
If full priming is not achieved, the discharge check
valve may be malfunctioning. If this occurs, shut
down the pump and consult Maintenance and
Repair, Section E for further details.
STARTING
Check the fuel level and oil levels in the engine, air
compressor, pump bearings and seal housing.
Make sure the pump is level. Lower the jack stands
and chock the wheels, if so equipped.
Make sure the pump is level. Lower jack
stands and chock the wheels, if so
equipped. Use caution when positioning
the skid‐mounted unit to prevent damage
to the fuel tank.
This pump is equipped with an automat
ic starting system, and is subject to au
tomatic restart. Keep hands and cloth
ing away from the unit to prevent injury
during automatic operation. Disconnect
the positive battery cable before per
forming any maintenance. Failure to do
so may result in serious personal injury.
Consult the engine operations manual before at
tempting to start the unit.
Manual Starting
On initial start‐up, set the engine speed at in the
half‐throttle position. Turn the keyswitch to `MANU
AL'. After the engine starts and the unit is fully
primed, adjust the engine RPM until the desired
flow rate is achieved.
OPERATION PAGE C - 1
Page 16
OM-07360 PA SERIES
Automatic Starting
With the float system installed, follow the proce
dures outlined for manual starting and throttle ad
justment. Switch the keyswitch to `OFF' until the
water level rises above the on point for the float sys
tem, then turn the keyswitch to the `AUTO' setting.
The unit will run until the float signals the control
that the water in the wet well is at the float off point,
at which time the unit will shut down automatically.
When the float signals the control that the water in
the wet well is at the float on point, the unit will re‐
start automatically, repeating the cycle.
OPERATION
The engine powering this unit may be
equipped with an EPA‐compliant Exhaust
After‐Treatment (EAT) system, which is de
signed to reduce the amount of polutants
expelled into the atmosphere during oper
ation. Refer to the manual accompanying
the engine for a detailed explanation of the
engine EAT and follow all instructions in the
engine manual to ensure uninterrupted op
eration of the unit.
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160 F (71C). Do not apply it at a higher operating
temperature.
Overheating can occur if operated with the valves
in the suction or discharge lines closed. Operating
against closed valves could bring the liquid to a
boil, build pressure, and cause the pump to rup
ture or explode. If overheating occurs, stop the
pump immediately and allow it to completely cool
before servicing it. Approach any over‐heated
pump cautiously.
Allow an over‐heated pump to com
pletely cool before servicing. Do not re
move plates, covers, gauges, or fittings
from an overheated pump. Liquid within
the pump can reach boiling tempera
tures, and vapor pressure within the
pump can cause parts being disen
gaged to be ejected with great force. Af
ter the pump cools, drain the liquid from
the pump by removing the casing drain
plug. Use caution when removing the
plug to prevent injury to personnel from
hot liquid.
Leakage
Once the pump is fully primed, no leakage should
be visible at pump mating surfaces, or at pump
connections or fittings. Keep all line connections
and fittings tight to maintain maximum pump effi
ciency.
Pump Vacuum Check
Read the vacuum gauge with the pump primed
and at operation speed. Shut off the pump. The
vacuum gauge reading will immediately drop pro
portionate to static suction lift, and should then sta
bilize. If the vacuum reading falls off rapidly after
stabilization, an air leak exists. Before checking for
the source of the leak, check the point of installa
tion of the vacuum gauge.
As a safeguard against rupture or explosion due to
heat, this pump is equipped with a pressure relief
valve which will open if vapor pressure within the
pump casing reaches a critical point. If over‐heat
ing does occur, stop the pump immediately and al
low it to cool before servicing it. Approach any
over‐heated pump cautiously. It is recom
mended that the pressure relief valve assembly be
replaced at each overhaul, or any time the pump
casing over‐heats and activates the valve. Never
replace this valve with a substitute which has not
been specified or provided by the Gorman‐Rupp
Company.
Strainer Check
Check the strainer regularly, and clean it as neces
sary. The strainer should also be checked if pump
OPERATIONPAGE C - 2
Page 17
PA SERIES
OM-07360
flow rate begins to drop. Monitor and record the
vacuum suction gauge readings regularly to detect
strainer blockage.
Never introduce air or steam pressure into the
pump casing or piping to remove a blockage. This
could result in personal injury or damage to the
equipment. If backflushing is absolutely neces
sary, liquid pressure must be limited to 50% of the
maximum permissible operating pressure shown
on the pump performance curve.
STOPPING
Never halt the flow of liquid suddenly. If the liquid
being pumped is stopped abruptly, damaging
shock waves can be transmitted to the pump and
piping system. Close all connecting valves slowly.
Reduce the throttle speed slowly and allow the en
gine to idle briefly before stopping.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, switch off the engine igni
tion and remove the key to ensure that the pump
will remain inoperative.
BEARING TEMPERATURE CHECK
Bearings normally run at higher than ambient tem
peratures because of heat generated by friction.
Temperatures up to 160F (71C) are considered
normal for bearings, and they can operate safely to
at least 180F (82C).
Checking bearing temperatures by hand is inaccu
rate. Bearing temperatures can be measured ac
curately by placing a contact‐type thermometer
against the housing. Record this temperature for
future reference.
A sudden increase in bearing temperatures is a
warning that the bearings are at the point of failing
to operate properly. Make certain that the bearing
lubricant is of the proper viscosity and at the cor
rect level (see LUBRICATION in the Maintenance
and Repair Manual). Bearing overheating can also
be caused by shaft misalignment and/or excessive
vibration.
When pumps are first started, the bearings may
seem to run at temperatures above normal. Con
tinued operation should bring the temperatures
down to normal levels.
Cold Weather Preservation
In below freezing conditions, drain the pump to
prevent damage from freezing. Also, clean out any
solids by flushing with a hose. Operate the pump
for approximately one minute; this will remove any
remaining liquid that could freeze the pump rotat
ing parts. If the pump will be idle for more than a
few hours, or if it has been pumping liquids con
taining a large amount of solids, drain the pump,
and flush it thoroughly with clean water. To prevent
large solids from clogging the drain port and pre
venting the pump from completely draining, insert
a rod or stiff wire in the drain port, and agitate the
liquid during the draining process. Clean out any
remaining solids by flushing with a hose.
If the pump is to be installed in an environment
where sub‐freezing temperatures will occur during
operation, consideration must be given to prevent
the pump and components from freezing when the
pump is idle between pumping cycles. Refer to
COLD WEATHER INSTALLATION in the Installa
tion section of this manual for details.
OPERATION PAGE C - 3
Page 18
PA SERIES
OM-07360
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man
ual.
2. Shut down the engine and discon
nect the positive battery cable to
ensure that the pump will remain
inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau
tiously.
7. Drain the pump.
This pump is equipped with an automat
ic starting system, and is subject to au
tomatic restart. Keep hands and cloth
ing away from the unit to prevent injury
during automatic operation. Disconnect
the positive battery cable before per
forming any maintenance. Failure to do
so may result in serious personal injury.
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS TO
PRIME
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
Discharge check valve contami
nated, damaged, or unable to seat.
Air leak in suction line. Correct leak.
Lining of suction hose collapsed. Replace suction hose.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
Suction lift or discharge head too high. Check piping installation and install
Air compressor damaged or belts bro
ken.
Strainer clogged. Check strainer and clean if neces
Eductor clogged. Check and clean eductor.
Air leak in suction line. Correct leak.
Lining of suction hose collapsed. Replace suction hose.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
Clean or replace check valve.
leaking or worn seal or gasket.
bypass line if needed. See INSTAL
LATION.
Check and repair/replace.
sary.
leaking or worn seal or gasket.
TROUBLESHOOTING PAGE D - 1
Page 19
OM-07360
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PA SERIES
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
Strainer clogged.
Discharge check valve clogged.
Suction intake not submerged at
proper level or sump too small.
Impeller or other wearing parts worn
or damaged.
Discharge head too high.
Suction lift too high.
Pump speed too slow. Check engine output; consult en
Belt or flexible coupling broken. Check and replace as necessary.
Pump speed too high. Check engine output.
Extreme ambient temperature. Reduce pump output.
Discharge head too low.
Fuel filter clogged. Check & replace often in extreme
Check strainer and clean if neces
sary.
Check and clean check valve.
Check installation and correct
submergence as needed.
Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.
Free impeller of debris.Impeller clogged.
Install bypass line.
Measure lift w/vacuum gauge. Re
duce lift and/or friction losses in
suction line.
gine operation manual.
Adjust discharge valve.
operating conditions.
PUMP CLOGS
FREQUENTLY
EXCESSIVE NOISE
Dilute if possible.Liquid solution too thick.
Check and replace as required.Fuel contaminated.
Pump or jack shaft bearing(s) frozen. Disassemble, check and replace
bearing(s) as required..
Discharge flow too slow.
Suction check valve or foot valve
clogged or binding.
Liquid solution too thick.
Cavitation in pump. Reduce suction lift and/or friction
Pumping entrained air.
Impeller clogged or damaged.
Open discharge valve fully to in
crease flow rate, and run engine at
maximum governed speed.
Clean valve.
Dilute if possible.
losses in suction line. Record vac
uum and pressure gauge readings
and consult local representative or
factory.
Locate and eliminate source of air
bubble.
Secure mounting hardware.Pump or drive not securely mounted.
Clean out debris; replace damaged
parts.
TROUBLESHOOTINGPAGE D - 2
Page 20
PA SERIES
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
OM-07360
BEARINGS RUN
TOO HOT
Bearing temperature is high, but
within limits.
Low or incorrect lubricant.
Suction and discharge lines not prop
erly supported.
Excessive tension on drive belt.
PREVENTIVE MAINTENANCE
Since pump applications are seldom identical, and
pump wear is directly affected by such things as
the abrasive qualities, pressure and temperature
of the liquid being pumped, this section is intended
only to provide general recommendations and
practices for preventive maintenance. Regardless
of the application however, following a routine pre
ventive maintenance schedule will help assure
trouble‐free performance and long life from your
Gorman‐Rupp pump. For specific questions con
cerning your application, contact your Gorman‐
Rupp distributor or the Gorman‐Rupp Company.
Record keeping is an essential component of a
good preventive maintenance program. Changes
in suction and discharge gauge readings (if so
Check bearing temperature regu
larly to monitor any increase.
Check for proper type and level of
lubricant.
Check piping installation for proper
support.
Align drive properly.Drive misaligned.
Check belt tension. Adjust as
required.
equipped) between regularly scheduled inspec
tions can indicate problems that can be corrected
before system damage or catastrophic failure oc
curs. The appearance of wearing parts should also
be documented at each inspection for comparison
as well. Also, if records indicate that a certain part
(such as the seal) fails at approximately the same
duty cycle, the part can be checked and replaced
before failure occurs, reducing unscheduled down
time.
For new applications, a first inspection of wearing
parts at 250 hours will give insight into the wear rate
for your particular application. Subsequent inspec
tions should be performed at the intervals shown
on the chart below. Critical applications should be
inspected more frequently.
TROUBLESHOOTING PAGE D - 3
Page 21
OM-07360
PA SERIES
Preventive Maintenance Schedule
Service Interval*
Item
General Condition (Temperature, Unusual
Noises or Vibrations, Cracks, Leaks,
Loose Hardware, Etc.) I
Pump Performance (Gauges, Speed, Flow) I
Bearing Lubrication I R
Seal Lubrication (And Packing Adjustment,
If So Equipped) I R
V‐Belts (If So Equipped) I
Air Release Valve Plunger Rod (If So Equipped) I C
Front Impeller Clearance (Wear Plate) I
Rear Impeller Clearance (Seal Plate) I
Check Valve I
Pressure Relief Valve (If So Equipped) C
Pump and Driver Alignment I
Shaft Deflection I
Bearings I
Bearing Housing I
Piping I
Driver Lubrication - See Mfgr's Literature
Daily Weekly Monthly Semi‐
Annually
Annually
Legend:
I = Inspect, Clean, Adjust, Repair or Replace as Necessary
C = Clean
R = Replace
* Service interval based on an intermittent duty cycle equal to approximately 4000 hours annually.
Adjust schedule as required for lower or higher duty cycles or extreme operating conditions.
TROUBLESHOOTINGPAGE D - 4
Page 22
PA SERIES
OM-07360
PUMP MAINTENANCE AND REPAIR - SECTION E
MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK
OPERATING PERFORMANCE.
STANDARD PERFORMANCE FOR PUMP MODEL PA12A60-B-4045H FT4-ESP
Based on 70F (21C) clear water at sea level
with minimum suction lift. Since pump installations
are seldom identical, your performance may be dif
ferent due to such factors as viscosity, specific
gravity, elevation, temperature, and impeller trim.
Contact the Gorman‐Rupp Company to verify per
formance or part numbers.
Pump speed and operating condition
If your pump serial number is followed by an “N”,
your pump is NOT a standard production model.
MAINTENANCE & REPAIR PAGE E - 1
points must be within the continuous per
formance range shown on the curve.
Page 23
OM-07360 PA SERIES
PARTS PAGE
ILLUSTRATION
10
3
9
8
SEE FIGURE 2
11
12
13
14 15
21
2
22
23
24
17
19
17
18
16
20
Figure 1. Pump Model PA12A60-B-4045H FT4-ESP
MAINTENANCE & REPAIRPAGE E - 2
Page 24
PA SERIES
OM-07360
PARTS LIST
Pump Model PA12A60-B-4045H FT4-ESP
(From S/N 1734917 Up)
If your pump serial number is followed by an “N”, your pump is NOT a standard production model. Contact
the Gorman‐Rupp Company to verify part numbers.
ITEM
NO.
1 PUMP MODEL ASSEMBLY 46133-726 1
2 POWER UNIT J DEERE 4045H FT4 46143-230 1
3 ENCLOSURE ASSEMBLY 42164-058 1
4 BUSHING J 2-1/2" 24131-531 1
5 SPROCKET 24271-001 1
6 DRIVE BELT 24154-001 1
7 GUARD ASSEMBLY 42353-703 1
8 SOCKET CONNECTOR 27263-001 1
9 FLANGED CAPSCREW 21634-505 2
10 WEATHER CAP 29334-313 1
11 T-BOLT CLAMP 4 IN 26518-166 2
12 90 DEG COBRA ELBOW 29284-080 1
13 4" BAND CLAMP 29334-283 1
14 PLUG CONNECTOR 27261-301 1
15 CABLE SO 16/4 X 120" LG 18141-147 1
16 SUPPORT BRACKET 34225-105 15080 1
17 WASHER SAE 3/4 21161-446 4
18 HEX HEAD CAP SCREW B1009 15991 2
19 LOCK WASHER J10 15991 2
20 HEX NUT D10 15991 2
21 HEX HEAD CAP SCREW B1212 15991 8
22 FLAT WASHER K12 15991 8
23 LOCK WASHER J12 15991 8
24 HEX NUT D12 15991 8
25 SPOOL 12" X 12 1/2" 46353-832 1
26 GASKET 12" 25113-041 2
27 HEX HEAD CAP SCREW B1415 15991 24
28 LOCK WASHER J14 15991 24
29 HEX NUT D14 15991 24
30 PIPE ELBOW R16 15079 2
31 PIPE NIPPLE T1616 15079 1
32 BALL VALVE 1" 26631-024 1
33 HOSE FITTING 26523-394 2
34 HOSE CLAMP 26518-667 2
35 1" ID X 15" LG HOSE 18513-045 1
36 PIPE NIPPLE T1644 15079 1
37 REDUCER PIPE BUSHING AP2416 11999 1
38 PIPE NIPPLE - 1" X 3" T1612 15079 1
39 SPOOL 12" X 8" 46353-818 1
NOT SHOWN:
PART NAME
"PRIME-AIRE" DECAL 38812-078 2
CAUTION DECAL 2613FJ 1
PART
NUMBER
QTY
INDICATES PARTS RECOMMENDED FOR STOCK
MAINTENANCE & REPAIR PAGE E - 3
Page 25
OM-07360 PA SERIES
ILLUSTRATION
GREEN WIRE
BLACK WIRE
G
W
B
R
SILVER PIN SOCKET
WHITE WIRE
RED WIRE
REF
8
REF
15
.25
1.25
WIRE END DETAIL
WIRING DETAIL
REF
GREEN WIRE
14
BLACK WIRE
B
R
SILVER PIN SOCKET
WHITE WIRE
G
W
RED WIRE
7
6
5
1
4
39
26272829
373830
36
30
31
33
32
25
26
33
34
35
34
27
28
29
Figure 2. Pump Model PA12A60-B-4045H FT4-ESP (Cont'd)
MAINTENANCE & REPAIRPAGE E - 4
Page 26
PA SERIES
OM-07360
PARTS LIST
Pump Model PA12A60-B-4045H FT4-ESP
If your pump serial number is followed by an “N”, your pump is NOT a standard production model. Contact
the Gorman‐Rupp Company to verify part numbers.
ITEM
NO.
1 PUMP MODEL ASSEMBLY 46133-726 1
2 POWER UNIT J DEERE 4045H FT4 46143-230 1
3 ENCLOSURE ASSEMBLY 42164-058 1
4 BUSHING J 2-1/2" 24131-531 1
5 SPROCKET 24271-001 1
6 DRIVE BELT 24154-001 1
7 GUARD ASSEMBLY 42353-703 1
8 SOCKET CONNECTOR 27263-001 1
9 FLANGED CAPSCREW 21634-505 2
10 WEATHER CAP 29334-313 1
11 T-BOLT CLAMP 4 IN 26518-166 2
12 90 DEG COBRA ELBOW 29284-080 1
13 4" BAND CLAMP 29334-283 1
14 PLUG CONNECTOR 27261-301 1
15 CABLE SO 16/4 X 120" LG 18141-147 1
16 SUPPORT BRACKET 34225-105 15080 1
17 WASHER SAE 3/4 21161-446 4
18 HEX HEAD CAP SCREW B1009 15991 2
19 LOCK WASHER J10 15991 2
20 HEX NUT D10 15991 2
21 HEX HEAD CAP SCREW B1212 15991 8
22 FLAT WASHER K12 15991 8
23 LOCK WASHER J12 15991 8
24 HEX NUT D12 15991 8
25 SPOOL 12" X 12 1/2" 46353-832 1
26 GASKET 12" 25113-041 2
27 HEX HEAD CAP SCREW B1415 15991 24
28 LOCK WASHER J14 15991 24
29 HEX NUT D14 15991 24
30 PIPE ELBOW R16 15079 2
31 PIPE NIPPLE T1616 15079 1
32 BALL VALVE 1" 26631-024 1
33 HOSE FITTING 26523-394 2
34 HOSE CLAMP 26518-667 2
35 1" ID X 15" LG HOSE 18513-045 1
36 PIPE NIPPLE T1644 15079 1
37 REDUCER PIPE BUSHING AP2416 11999 1
38 PIPE NIPPLE - 1" X 3" T1612 15079 1
39 SPOOL 12" X 8" 46353-818 1
NOT SHOWN:
PART NAME
"PRIME-AIRE" DECAL 38812-078 2
CAUTION DECAL 2613FJ 1
PART
NUMBER
QTY
INDICATES PARTS RECOMMENDED FOR STOCK
MAINTENANCE & REPAIR PAGE E - 5
Page 27
OM-07360 PA SERIES
ILLUSTRATION
25 26
27 28
A
3
29
28
27
33
31
32
DETAIL A
34
4
2
1
9
5
6
8
27
28
7
29 28
27 30
6
8
24
23
22
21
2018
16
17
18
19
Figure 3. Power Unit Kit
10
11
12
13
14
15
MAINTENANCE & REPAIRPAGE E - 6
Page 28
PA SERIES
ITEM
PART NAME PART
NO.
NUMBER
PARTS LIST
Power Unit Kit
QTY ITEM
NO.
PART NAME PART
NUMBER
OM-07360
QTY
1 BASE/FUEL TANK ASSY 41553-074 24150 1
2 VACUUM HOSE ASSY 46341-021 1
3 LIFTING BAIL KIT 48274-827 1
4 EXHAUST EXTENSION 31615-048 15000 1
5 AIR INTAKE PIPE ASSY 46671-505 24150 1
6 JD 4045H FT4 ENGINE 29224-478 1
7 CNTRL PNL INSTALL KIT 48122-563 1
8 PEDESTAL ASSY 44167-510 1
9 ENGINE DRIVE ASSY 44162-179 1
10 1/0 NEG. CABLE ASSY 36" 47311-185 1
11 1/0 POS. CABLE ASSY 36" 47311-110 1
12 BATTERY BOX ASSY 42432-005 1
13 THREADED BAR ASSY 41111-022 24150 4
14 HEX JAM NUT AT12 15991 8
15 WASHER SAE 3/4 21161-446 8
16 PIPE CAP V08 15079 1
17 HOSE BARB FITTING 26523-446 1
18 HOSE CLAMP 26518-642 4
19 .50 ID X 76" LG HOSE 18513-056 1
20 .38 ID X 75" LG HOSE 18513-054 1
21 3/8 BARB X 1/2 NPT FTG 26523-387 1
22 HEX HEAD CAP SCREW B0807 15991 6
23 LOCK WASHER J08 15991 10
24 SPACER 33211-004 15120 6
25 HOSE BARB FITTING 26523-447 1
26 AIR VENT S1703 1
27 HOSE BARB FTG 26523-015 4
28 CONNECTOR S1447 4
29 FUEL PICKUP 29332-145 2
30 .37 ID X 20" LG HOSE 18513-302 1
31 HOSE BARB FITTING 26523-389 1
32 .37 ID X 32.5" LG HOSE 18513-302 1
33 .37 ID X 20" LG HOSE 18513-302 1
34 FUEL SENDING UNIT KIT 48122-939 1
35 MUFFLER/FILTER 29334-091 1
36 PIPE ELBOW R16 15079 1
37 PIPE NIPPLE T1608 15079 1
38 HEX HEAD CAP SCREW B0504 15991 6
39 LOCK WASHER J05 15991 6
40 HEX NUT D05 15991 6
41 VENTURI 26817-001 1
42 PIPE CPLG 3/4 AE12 15079 1
43 REDUCER PIPE BUSHING AP1208 15079 1
44 PIPE NIPPLE T0808 15079 1
45 PRESSURE RELIEF VALVE 26662-028 1
46 PIPE TEE U08 11999 1
47 MALE ADAPTER 26351-065 1
48 HOSE ASSEMBLY 46341-426 1
49 VENTURI GUARD 34628-063 15120 1
50 PIPE CPLG 1 AE16 15079 1
51 CONDUIT CLAMP - 1" 22811-258 2
52 HEX NUT D10 15991 4
53 LOCK WASHER J10 15991 4
54 HEX HEAD CAP SCREW B1007 15991 4
55 FLAT WASHER K10 15991 8
56 HEX HEAD CAP SCREW B0805 15991 4
57 HEX ADAPTER 26523-188 1
58 MALE ELBOW 26341-310 1
NOT SHOWN:
ENGINE START-UP TAG 38816-269 1
WARNING DECAL 38816-203 4
INSTRUCTION DECAL 38818-144 1
FLOAT SWITCH KIT 48312-980 1
TEFLON PIPE SEALANT 18771-055 1
LOW SULFUR DECAL 38816-196 1
DEF TANK DECAL 38816-273 1
WARNING DECAL 38817-101 2
ENG OPERATING DECAL 38816-347 1
WARNING DECAL 2613FE 1
FUEL TANK DRAIN LABEL 38816-321 4
MAINTENANCE & REPAIR PAGE E - 7
Page 29
OM-07360 PA SERIES
ILLUSTRATION
48
47
49
46
45
50
2
42
43
44
41
38
39
40
51 38 39 40
35 36 37
48
57 58
COMPRESSOR VIEW
55
53
52
54
23
56
Figure 4. Power Unit Kit (Cont'd)
MAINTENANCE & REPAIRPAGE E - 8
Page 30
PA SERIES
ITEM
PART NAME PART
NO.
NUMBER
PARTS LIST
Power Unit Kit
QTY ITEM
NO.
PART NAME PART
NUMBER
OM-07360
QTY
1 BASE/FUEL TANK ASSY 41553-074 24150 1
2 VACUUM HOSE ASSY 46341-021 1
3 LIFTING BAIL KIT 48274-827 1
4 EXHAUST EXTENSION 31615-048 15000 1
5 AIR INTAKE PIPE ASSY 46671-505 24150 1
6 JD 4045H FT4 ENGINE 29224-478 1
7 CNTRL PNL INSTALL KIT 48122-563 1
8 PEDESTAL ASSY 44167-510 1
9 ENGINE DRIVE ASSY 44162-179 1
10 1/0 NEG. CABLE ASSY 36" 47311-185 1
11 1/0 POS. CABLE ASSY 36" 47311-110 1
12 BATTERY BOX ASSY 42432-005 1
13 THREADED BAR ASSY 41111-022 24150 4
14 HEX JAM NUT AT12 15991 8
15 WASHER SAE 3/4 21161-446 8
16 PIPE CAP V08 15079 1
17 HOSE BARB FITTING 26523-446 1
18 HOSE CLAMP 26518-642 4
19 .50 ID X 76" LG HOSE 18513-056 1
20 .38 ID X 75" LG HOSE 18513-054 1
21 3/8 BARB X 1/2 NPT FTG 26523-387 1
22 HEX HEAD CAP SCREW B0807 15991 6
23 LOCK WASHER J08 15991 10
24 SPACER 33211-004 15120 6
25 HOSE BARB FITTING 26523-447 1
26 AIR VENT S1703 1
27 HOSE BARB FTG 26523-015 4
28 CONNECTOR S1447 4
29 FUEL PICKUP 29332-145 2
30 .37 ID X 20" LG HOSE 18513-302 1
31 HOSE BARB FITTING 26523-389 1
32 .37 ID X 32.5" LG HOSE 18513-302 1
33 .37 ID X 20" LG HOSE 18513-302 1
34 FUEL SENDING UNIT KIT 48122-939 1
35 MUFFLER/FILTER 29334-091 1
36 PIPE ELBOW R16 15079 1
37 PIPE NIPPLE T1608 15079 1
38 HEX HEAD CAP SCREW B0504 15991 6
39 LOCK WASHER J05 15991 6
40 HEX NUT D05 15991 6
41 VENTURI 26817-001 1
42 PIPE CPLG 3/4 AE12 15079 1
43 REDUCER PIPE BUSHING AP1208 15079 1
44 PIPE NIPPLE T0808 15079 1
45 PRESSURE RELIEF VALVE 26662-028 1
46 PIPE TEE U08 11999 1
47 MALE ADAPTER 26351-065 1
48 HOSE ASSEMBLY 46341-426 1
49 VENTURI GUARD 34628-063 15120 1
50 PIPE CPLG 1 AE16 15079 1
51 CONDUIT CLAMP - 1" 22811-258 2
52 HEX NUT D10 15991 4
53 LOCK WASHER J10 15991 4
54 HEX HEAD CAP SCREW B1007 15991 4
55 FLAT WASHER K10 15991 8
56 HEX HEAD CAP SCREW B0805 15991 4
57 HEX ADAPTER 26523-188 1
58 MALE ELBOW 26341-310 1
NOT SHOWN:
ENGINE START-UP TAG 38816-269 1
WARNING DECAL 38816-203 4
INSTRUCTION DECAL 38818-144 1
FLOAT SWITCH KIT 48312-980 1
TEFLON PIPE SEALANT 18771-055 1
LOW SULFUR DECAL 38816-196 1
DEF TANK DECAL 38816-273 1
WARNING DECAL 38817-101 2
ENG OPERATING DECAL 38816-347 1
WARNING DECAL 2613FE 1
FUEL TANK DRAIN LABEL 38816-321 4
MAINTENANCE & REPAIR PAGE E - 9
Page 31
OM-07360 PA SERIES
ILLUSTRATION
14
1
13
11
12
10
2
9
34
6
8
7
6
43
5
Figure 5. Pump Model Assembly
MAINTENANCE & REPAIRPAGE E - 10
Page 32
PA SERIES
OM-07360
PARTS LIST
Pump Model Assembly
ITEM
NO.
1 PUMP 46133-640 1
2 HEX HEAD CAP SCREW B1416 15991 12
3 LOCK WASHER J14 15991 24
4 HEX NUT D14 15991 24
5 CHECK VALVE 12" 26642-128 1
6 GASKET 4991G 18000 2
7 PIPE PLUG P04 15079 1
8 12" SPOOL 38642-622 10000 1
9 GASKET 25113-034 1
10 4" BLIND FLANGE ASSEMBLY 42111-358 1
11 LOCK WASHER J10 15991 8
12 HEX HEAD CAP SCREW B1007 15991 8
13 HEX HEAD CAP SCREW B1413 15991 12
14 PRIMING CHAMBER KIT 48275-006 1
INDICATES PARTS RECOMMENDED FOR STOCK
PART NAME
-FLAPPER 26688-003 1
-GASKET 26688-004 1
-O‐RING 25152-469 1
PART
NUMBER
QTY
MAINTENANCE & REPAIR PAGE E - 11
Page 33
OM-07360 PA SERIES
ILLUSTRATION
SEE FIG. 7
Figure 6. Pump Sub-Assembly
MAINTENANCE & REPAIRPAGE E - 12
Page 34
PA SERIES
ITEM
PART NAME PART
NO.
PARTS LIST
Pump Sub-Assembly
QTY ITEM
NUMBER
PART NAME PART
NO.
OM-07360
QTY
NUMBER
1 PUMP CASING SEE NOTE BELOW 1
IMP/WEAR RING ASSY 46151-022 24110 1
2
3 2.75 DIA SEAL ASSY 46512-109 1
4 STUD C1013 15991 3
5 STUD C1011 15991 9
6 GASKET 38674-434 18000 1
7 SOC HD CAP SCREW BD1206 15990 1
8 IMPELLER WASHER 31167-012 15030 1
9 ROLL PIN S2197 1
10 HOSE CLAMP 26518-642 2
11 MALE CONNECTOR 26523-409 2
12 OILER BRACKET ASSY 41881-811 24150 1
13 FLAT WASHER K10 15991 1
14 LOCK WASHER J10 15991 22
15 HEX NUT D10 15991 24
16 MACHINE SCREW X0405 15991 2
17 LOCK WASHER J04 15991 2
18 SIGHT GAUGE S1471 2
19 VENTED PIPE PLUG 38649-009 15079 1
20 PEDESTAL 38257-520 10000 1
21 PIPE PLUG P04 15079 1
22 HEX HEAD CAP SCREW B0605 15991 12
23 OIL SEAL 25258-845 3
24 BEARING CAP 38322-429 10000 1
25 O‐RING 25152-249 1
26 SHIM SET 48261-055 1
27 BEARING LOCKNUT 23962-015 1
28 BEARING LOCK WASHER 23962-515 1
29 BEARING CAP GASKET 4184G 18000 1
30 BALL BEARING 23413-015 2
31 SHAFT KEY N1016 15990 1
32 IMPELLER SHAFT 38512-522 17040 1
33 IMPELLER KEY N0809 15990 1
34 ROLLER BEARING 23528-005 1
35 BEARING CAP 38322-425 10010 1
36 AIR VENT S1703 1
37 O‐RING 25151-266 1
38 PIPE CPLG 3/8 AE06 15079 1
39 PIPE NIPPLE T0608 15079 1
40 SEAL PLATE 38272-717 10000 1
41 PIPE PLUG P12 15079 2
42 SHIM SET 48261-033 1
43 PIPE PLUG P06 15079 2
44 PIPE PLUG P24 10009 1
45 SEAL PLATE COVER 38242-708 10000 1
46 HEX HEAD CAP SCREW B0503-1/2 15991 6
47 LOCK WASHER J05 15991 6
48 .38 I.D. x 11" LG. HOSE 18513-054 1
49 SUCTION HEAD 4180 10010 1
50 SPIRAL PIN 21137-123 3
51 WEAR RING 4181A 14000 1
52 GASKET 4180G 18000 1
53 STUD C1009 15991 12
54 BOTTLE OILER 26713-004 1
55 SNAP RING 24124-057 1
56 DRIVE SCREW BM#04-03 17000 4
57 NAMEPLATE BLANK 38819-002 13000 1
NOT SHOWN:
SUCTION STICKER 6588AG 1
ROTATION DECAL 2613M 1
G-R DECAL GR-06 1
WARNING DECAL 2613FE 1
INSTRUCTION TAG 38817-024 1
LUBRICATION DECAL 38816-079 1
INSTRUCTION TAG 38817-011 1
OIL LEVEL DECAL 38816-123 1
DISCHARGE STICKER 6588BJ 1
INDICATES PARTS RECOMMENDED FOR STOCK
INCLUDED WITH REPAIR 46474-902 1
PUMP CASING ASSY
MAINTENANCE & REPAIR PAGE E - 13
Page 35
OM-07360 PA SERIES
ILLUSTRATION
SEE FIG. 6
Figure 7. Pump Sub-Assembly (Cont'd)
MAINTENANCE & REPAIRPAGE E - 14
Page 36
PA SERIES
ITEM
PART NAME PART
NO.
PARTS LIST
Pump Sub-Assembly (Cont'd)
NUMBER
QTY ITEM
PART NAME PART
NO.
OM-07360
QTY
NUMBER
1 PUMP CASING SEE NOTE BELOW 1
IMP/WEAR RING ASSY 46151-022 24110 1
2
3 2.75 DIA SEAL ASSY 46512-109 1
4 STUD C1013 15991 3
5 STUD C1011 15991 9
6 GASKET 38674-434 18000 1
7 SOC HD CAP SCREW BD1206 15990 1
8 IMPELLER WASHER 31167-012 15030 1
9 ROLL PIN S2197 1
10 HOSE CLAMP 26518-642 2
11 MALE CONNECTOR 26523-409 2
12 OILER BRACKET ASSY 41881-811 24150 1
13 FLAT WASHER K10 15991 1
14 LOCK WASHER J10 15991 22
15 HEX NUT D10 15991 24
16 MACHINE SCREW X0405 15991 2
17 LOCK WASHER J04 15991 2
18 SIGHT GAUGE S1471 2
19 VENTED PIPE PLUG 38649-009 15079 1
20 PEDESTAL 38257-520 10000 1
21 PIPE PLUG P04 15079 1
22 HEX HEAD CAP SCREW B0605 15991 12
23 OIL SEAL 25258-845 3
24 BEARING CAP 38322-429 10000 1
25 O‐RING 25152-249 1
26 SHIM SET 48261-055 1
27 BEARING LOCKNUT 23962-015 1
28 BEARING LOCK WASHER 23962-515 1
29 BEARING CAP GASKET 4184G 18000 1
30 BALL BEARING 23413-015 2
31 SHAFT KEY N1016 15990 1
32 IMPELLER SHAFT 38512-522 17040 1
33 IMPELLER KEY N0809 15990 1
34 ROLLER BEARING 23528-005 1
35 BEARING CAP 38322-425 10010 1
36 AIR VENT S1703 1
37 O‐RING 25151-266 1
38 PIPE CPLG 3/8 AE06 15079 1
39 PIPE NIPPLE T0608 15079 1
40 SEAL PLATE 38272-717 10000 1
41 PIPE PLUG P12 15079 2
42 SHIM SET 48261-033 1
43 PIPE PLUG P06 15079 2
44 PIPE PLUG P24 10009 1
45 SEAL PLATE COVER 38242-708 10000 1
46 HEX HEAD CAP SCREW B0503-1/2 15991 6
47 LOCK WASHER J05 15991 6
48 .38 I.D. x 11" LG. HOSE 18513-054 1
49 SUCTION HEAD 4180 10010 1
50 SPIRAL PIN 21137-123 3
51 WEAR RING 4181A 14000 1
52 GASKET 4180G 18000 1
53 STUD C1009 15991 12
54 BOTTLE OILER 26713-004 1
55 SNAP RING 24124-057 1
56 DRIVE SCREW BM#04-03 17000 4
57 NAMEPLATE BLANK 38819-002 13000 1
NOT SHOWN:
SUCTION STICKER 6588AG 1
ROTATION DECAL 2613M 1
G-R DECAL GR-06 1
WARNING DECAL 2613FE 1
INSTRUCTION TAG 38817-024 1
LUBRICATION DECAL 38816-079 1
INSTRUCTION TAG 38817-011 1
OIL LEVEL DECAL 38816-123 1
DISCHARGE STICKER 6588BJ 1
INDICATES PARTS RECOMMENDED FOR STOCK
INCLUDED WITH REPAIR 46474-902 1
PUMP CASING ASSY
MAINTENANCE & REPAIR PAGE E - 15
Page 37
OM-07360 PA SERIES
ILLUSTRATION
Figure 8. Priming Chamber Kit
ITEM
NO.
1 BALL VALVE 26631-054 1
2 STREET ELBOW RS16 11999 1
3 PRIMING CHAMBER ASSEMBLY 46112-709 1
4 HEX NUT D08 15991 4
5 LOCK WASHER J08 15991 4
6 STUD C0809 15991 4
7 BAFFLE 31113-011 17000 1
8 GASKET 38687-053 19060 1
INDICATES PARTS RECOMMENDED FOR STOCK
PART NAME
PART
NUMBER
MAINTENANCE & REPAIRPAGE E - 16
QTY
Page 38
PA SERIES
OM-07360
ILLUSTRATION
Figure 9. Priming Chamber Assembly
ITEM
NO.
1 PRIMING VALVE 26664-007 1
2 HEX HEAD CAP SCREW B0806 15991 8
3 LOCK WASHER J08 15991 8
4 PRIMING VALVE GASKET 38683-657 19060 1
5 PRIMING CHAMBER 38343-020 10000 1
6 STRAINER ASSEMBLY 46641-222 17000 1
INDICATES PARTS RECOMMENDED FOR STOCK
MAINTENANCE & REPAIR PAGE E - 17
PART NAME
-ORIFICE BUTTON 26688-021 REF
PART
NUMBER
QTY
Page 39
OM-07360 PA SERIES
ILLUSTRATION
15
8
7
2
2
6
5
4
2
3
2
1
17
16
13
14
9
9
10
11
12
Figure 10. Engine Drive Assembly
ITEM
NO.
PART NAME
1 RETAINING RING 24121-075 1
2 RETAINING RING S215 4
3 BALL BEARING 23282-012 1
4 OUTPUT SHAFT 38512-051 1706H 1
5 KEY N0612 15990 1
6 BEARING HOUSING 38251-001 11010 1
7 SOCKET HEAD CAP SCREW BD0606-1/2S 15990 8
8 LOCK WASHER J06 15991 8
9 ALLEN HD SET SCREW GA0703-1/2 15990 REF
10 BUSHING 2012 X 1-1/2 24131-496 1
11 COUPLING W/O BUSHING 24391-103 1
12 BALL BEARING 23431-012 1
13 KEY N0807 15990 1
14 SPROCKET 24271-004 1
15 TAPERLOCK BUSHING 24131-526 1
16 CAP SCREW M10 X 1.5 X 30 22645-164 8
17 LOCK WASHER M10 21171-511 8
INDICATES PARTS RECOMMENDED FOR STOCK
PART
NUMBER
QTY
MAINTENANCE & REPAIRPAGE E - 18
Page 40
PA SERIES
OM-07360
ILLUSTRATION
IMPELLER
WEAR RING
NOTE: UNLESS OTHERWISE SPECIFIED,
MACHINED SURFACES TO BE 125 RMS.
Figure 11. Impeller Assembly Machining Tolerances
MAINTENANCE & REPAIR PAGE E - 19
Page 41
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY
PA SERIESOM-07360
Review all SAFETY information in Section A.
Follow the instructions on all tags, label and de
cals attached to the pump.
This pump requires little service due to its rugged,
minimum‐maintenance design. However, if it be
comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the sectional views (see Figures 1 through 10) and
the accompanying parts list.
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 antici
pate and provide detailed instructions
and precautions for every situation that
might occur during maintenance of the
unit. Therefore, it is the responsibility of
the owner/maintenance personnel to
ensure that only safe, established main
tenance procedures are used, and that
any procedures not addressed in this
manual are performed only after estab
lishing that neither personal safety nor
pump integrity are compromised by
such practices.
Before attempting to service the pump, shut down
the engine and take precautions to ensure that the
pump will remain inoperative. Close all valves in the
suction and discharge lines.
No instructions for removal and/or disassembly of
the enclosure or its components are provided in
this manual. If removal of the enclosure is required
for pump service, be sure to use safe shop practic
es so as not to endanger personnel, and use cau
tion to prevent damage to the enclosure.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man
ual.
2. Shut down the engine and discon
nect the postiive battery cable to
ensure that the pump will remain
inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau
tiously.
7. Drain the pump.
This pump may be used to handle mate
rials which could cause illness through
direct exposure or emitted fumes. Wear
adequate protective clothing when
working on the pump or piping.
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
MAINTENANCE & REPAIRPAGE E - 20
Page 42
OM-07360PA SERIES
necessary and keep personnel away
from suspended objects.
Use Only Genuine Gorman-Rupp re
placement parts. Failure to do so may cre
ate a hazard and damage the pump or di
minish optimal pump performance. Any
such hazard, damage or diminished per
formance is not covered by the warranty.
NOTE
When appropriate recycling facilities are available,
the user should recycle components and fluids
when doing any routine maintenance / repairs and
also at the end of the pump’s useful life. All other
components and fluids shall be disposed of ac
cording to all applicable codes and regulations.
Priming Chamber Removal And Disassembly
pivot pin closest to the orifice button and remove
the pivot pin. This will allow the linkage to be raised
high enough to access the orifice button.
Remove the hex nut and lockwasher securing the
orifice button to the linkage bar and unscrew the
orifice button from the linkage bar.
Discharge Check Valve Removal and
Disassembly
(Figure 5)
Support the discharge check valve assembly (5)
using a sling and a suitable lifting device. Remove
the hardware (3 and 4) and separate the discharge
check valve assembly and gasket (6) from the
pump assembly (1).
The flapper and cover gasket are the only service
able parts of the check valve. If the flapper requires
replacement, remove the hardware securing the
cover. Separate the valve cap and remove the flap
per and gasket.
(Figure 8)
Disconnect both the suction piping and the air dis
charge tubing from the priming chamber assembly
(3). Support the priming chamber assembly using
a sling and a suitable lifting device. Disengage the
hardware (4 and 5) and separate the priming
chamber assembly (3), gasket (8) and baffle (7)
from the spool (8, Figure 5).
(Figure 9)
Remove the hardware (2 and 3) securing the prim
ing valve (1) to the priming chamber (5). Carefully
lift the valve components from the priming cham
ber. Remove the gasket (4) and clean the mating
surfaces.
If the priming chamber float is stuck or the strainer
(6) is clogged, it can usually be cleaned without fur
ther disassembly.
The only serviceable part of the priming chamber is
the orifice button (not shown). If liquid continues to
bypass through the priming chamber after adjust
ing the orifice button (see Priming Chamber
Reassembly and Installation for adjustment), the
button may require replacement. To replace the
orifice button, remove one of the “e‐clips” from the
Suction Head And Wear Ring Removal
(Figure 6)
Unless replacement of the spool gasket (6, Figure
5) is required, the suction head (49) may be re
moved without separating it from the spool. How
ever, if the spool gasket must be replaced, support
the spool with a suitable hoist and sling, remove
the hardware (3 and 4, Figure 5) and separate the
suction spool and gasket from the suction head.
Remove the hardware securing the suction head
(49) to the base. Support the suction head using a
suitable hoist and sling. Disengage the hardware
(14 and 15) and separate the suction head and
wear ring (51) from the pump casing. Remove the
suction head gasket (52) and clean the mating sur
faces.
Inspect the wear ring for excessive wear or scoring.
The wear ring is a press fit into the suction head
and is additionally secured with the spiral pins (50).
If replacement is required, use a small bit to drill
three holes horizontally, 180 apart, through the
wear ring between each of the spiral pins. Use a
chisel or other suitable tool to complete the cuts
through the wear ring. Use caution not to damage
the suction head bore. Remove the wear ring sec
MAINTENANCE & REPAIR PAGE E - 21
Page 43
PA SERIESOM-07360
tions from the suction head. Pull the spiral pins
from the suction head.
If no further disassembly is required, see Suction
Head and Wear Ring Installation.
Pump Casing Removal
(Figure 6)
Support the pump casing using a suitable hoist
and sling.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam
age to equipment. If slings or chains are
used to move the pump or components,
make sure that the load is balanced;
otherwise serious personal injury or
death could result. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting.
NOTE
When removing the pump casing, use a wire to se
cure the assembled bottle oiler (54, Figure 7) and
bracket (12, Figure 7) above the level of the oil in the
seal cavity. This will prevent oil from leaking out of
the oiler during disassembly.
If the impeller (2) is to be removed, the impeller
screw (7) should be loosened before removing the
pump casing. Immobilize the impeller by inserting
a wood block through the pump discharge and
into the impeller vanes. Remove the impeller screw
and washer (8). Remove the wood block from the
pump discharge.
Remove the hardware (13, 14 and 15, Figure 7) se
curing the pump casing and bottle oiler bracket to
the pedestal (20, Figure 7).
Impeller Removal
(Figure 6)
Before removing the impeller, loosen the hose
clamp (10, Figure 7) and remove the hose (48, Fig
ure 7) from the lower connector (11, Figure 7). Re
move the bottle oiler and bracket assembly and
drain the seal cavity. This will prevent the oil in the
oiler from escaping when the impeller is removed.
With the impeller screw and washer removed as
described in Pump Casing Removal, insert a pair
of wedges 180 apart between the impeller and the
seal plate (40, Figure 7). Tap the wedges alternate
ly to force the impeller off the shaft. Retain the im
peller key (33, Figure 7).
Inspect the impeller wear ring for excessive wear or
scoring.
Proper replacement of the impeller wear
ring requires machining and dynamic bal
ancing the impeller assembly after the new
wear ring is welded to the impeller. Failure
to properly install the new wear ring and
machine and balance the impeller assem
bly can result in premature shaft, seal or
bearing failure, or other damage to the
pump.
To replace the wear ring, grind off the three weld
spots securing the wear ring to the impeller. Use
caution not to damage the impeller. Pry or carefully
grind the wear ring off the impeller.
Seal Removal
(Figures 6 and 13)
This pump is designed with two seals; a primary
mechanical seal (3) located directly behind the im
peller and a secondary oil seal (23, Figure 7) locat
ed in the seal plate cover (45, Figure 7). If the liquid
being pumped leaks past the oil seal, both seals
should be replaced immediately.
Pull the pump casing straight away from the ped
estal to prevent binding on the impeller. Remove
the casing gasket (6) and clean the contacting sur
faces.
Remove the impeller shims (42). Tie and tag the
shims for ease of reassembly. Remove the seal
spring. Slide the rotating portion of the seal (con
sisting of the shaft sleeve and O‐ring, bellows and
MAINTENANCE & REPAIRPAGE E - 22
Page 44
OM-07360PA SERIES
retainer, and rotating element) off the shaft as a
unit.
Apply oil to the sleeve and work it up under the rub
ber bellows. Slide the bellows and retainer off the
sleeve. Remove the sleeve O‐ring.
Slide the seal plate and remaining seal compo
nents off the shaft. Disengage the hardware (46
and 47, Figure 7) and separate the seal plate cover
and O‐ring (37, Figure 7) from the seal plate.
Use a suitably sized dowel to press the stationary
portion of the seal out of the seal plate. Press the oil
seal out of the seal plate cover.
If no further disassembly is required, refer to Seal
Installation.
Pedestal Assembly Removal
(Figure 2)
Disassembly of the pedestal requires separation of
the pump and driver. Disengage the hardware se
curing the belt guard to the lifting bail and remove
the guard.
Loosen, but do not remove, the hardware securing
the pump suction head (49, Figure 6) and pedestal
(20, Figure 7) to the fuel tank assembly (1).
Tension on the pump drive belt (17, Figure 2) is ob
tained through the use of “pusher rods” used to
move the pump and pedestal side‐to‐side. To re
move the pedestal, loosen the outer hardware on
the threaded rods. Unscrew the jam nuts until they
engage the adjusting brackets. Continue to un
screw the jam nuts in an alternating sequence to
“push” the pedestal assembly toward the pump
sprocket (15, Figure 2). When sufficient clearance
is obtained, remove the pump drive belt from the
engine sprocket (14, Figure 10).
Pump Shaft and Bearing Removal and
Disassembly
(Figure 2)
When the pump is properly operated and main
tained, the pedestal should not require disassem
bly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly
equipped shop by qualified personnel.
The sprocket and bushing (4 and 5) must be re
moved from the drive end of the shaft before disas
sembling the pedestal (20, Figure 7). To remove
the sprocket, remove the screws securing the
sprocket to the hub, then reinstall the screws in the
tapped holes in the sprocket. Tighten the screws in
an alternating sequence to press against the hub
shoulder and “jack” the sprocket off the hub.
With the sprocket removed, the hub can be pulled
or pried off the shaft. Remove the shaft key.
(Figure 7)
Before disassembling the pedestal, remove the
pedestal drain plug (21) and drain the oil from the
pedestal. Clean and reinstall the pipe plug.
Disengage the capscrews (22) and and remove
the outboard bearing cap (24), O‐ring (25) and oil
seal (23). Remove the bearing shims (26). Press
the oil seal from the bearing cap.
Straighten the tab on the washer (28) securing the
bearing lock nut (27). Use a spanner wrench to re
move the lock nut. Remove the tab washer.
Disengage the capscrews (22) and remove the in
board bearing cap (35) and oil seal (23). Remove
the bearing cap gasket (29) and clean the mating
surfaces. Press the oil seal from the bearing cap.
Place a block of wood against the impeller end of
the shaft (32) and tap the shaft and assembled
bearings (30 and 34) out of the pedestal.
Remove the hardware securing the pedestal to the
base. Use a suitable hoist and sling to remove the
pedestal assembly.
MAINTENANCE & REPAIR PAGE E - 23
After removing the shaft and bearings, clean and
inspect the bearings in place as described in
Bearing Cleaning And Inspection.
Page 45
PA SERIESOM-07360
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the pedestal.
Replace the bearings, shaft, or pedestal if the
proper bearing fit is not achieved.
If bearing replacement is required, remove the re
taining ring (55) and use a bearing puller to remove
the inboard and outboard bearings from the shaft.
Engine Drive Disassembly
(Figure 10)
This engine is equipped with a jackshaft type drive
assembly as shown in Figure 10.
To remove the sprocket (14), remove the caps
crews securing the taperlock bushing (15) to the
sprocket. Reinstall the capscrews in the tapped
holes in the bushing and use a suitable puller to
pull the bushing and sprocket off the output shaft
(4). Retain the key (13).
Further disassembly requires separating the re
maining drive components from the engine. Re
move the hardware (not shown, supplied with the
engine) securing the bearing housing (16) to the
engine. Pull the shaft and bearing housing straight
away from the engine. The rubber drive element of
the coupling (11) will separate from the drive ring
secured to the engine flywheel with the hardware
(7 and 8). Disengage the hardware to remove the
drive ring from the flywheel.
To remove the flexible portion of the coupling from
the output shaft, unscrew the two allen head set
screws (9) from the bushing (10). Screw one of the
setscrews into the hole on the circumference of the
bushing to separate the coupling and bushing.
When the parts separate, remove the bushing, and
slide the coupling off the shaft. Remove the key (5).
When properly operated and maintained, the out
put shaft and bearings should not require disas
sembly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.
should be performed only in a properly
equipped shop by qualified personnel.
To remove the shaft and bearings (3 and 12), use
snap ring pliers to remove the retaining ring (1).
Use a wood block to tap the shaft and bearings
from the bearing housing from the driven end.
After removing the shaft and bearings, clean and
inspect the bearings in place as described in
Bearing Cleaning And Inspection.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear
ings are removed.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the bearing
housing. Replace the bearings, shaft, or bearing
housing if the proper bearing fit is not achieved.
If bearing replacement is required, remove the out
board retaining rings (2) and use a bearing puller to
remove the inboard (3) and outboard (12) bearings
from the shaft.
It is not necessary to remove the inboard bearing
retaining rings unless replacement is required.
Use snap ring pliers to remove the retaining rings
as required.
Bearing Cleaning And Inspection
(Figure 7)
Clean the pedestal, bearing housing, shafts and all
component parts (except the bearings) with a soft
cloth soaked in cleaning solvent. Inspect the parts
for wear or damage and replace as necessary.
Shaft and bearing disassembly in the field
is not recommended. These operations
Most cleaning solvents are toxic and
flammable. Use them only in a well ven
tilated area free from excessive heat,
sparks, and flame. Read and follow all
MAINTENANCE & REPAIRPAGE E - 24
Page 46
OM-07360PA SERIES
precautions printed on solvent contain
ers.
Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will great
ly shorten bearing life. Do not spin dry
bearings. This may scratch the balls or
races and cause premature bearing fail
ure.
Rotate the bearings by hand to check for rough
ness or binding. Inspect the bearing balls (or roll
ers) on open‐type bearings. If rotation is rough or
the balls or rollers are discolored, replace the bear
ings.
Engine Drive Reassembly
(Figure 10)
Inspect the output shaft for distortion, nicks,
scratches, damaged keyways or galling on the
bearing seating surfaces. Dress small nicks and
burrs with a fine file or emery cloth. Replace the
shaft if defective.
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor
oughly filtered.
Heat the bearings to a uniform temperature no
higher than 250F (120C), and slide the bearings
onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con
tinuous motion, to prevent the bearings from cool
ing and sticking on the shaft.
Use caution when handling hot bearings to
prevent burns.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
in shrinking. If movement has occurred, use a suit
ably sized sleeve and a press to reposition the
bearings.
If heating the bearings is not practical, use a suit
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings on the shaft.
Slide the shaft and assembled bearings into the
bearing housing until the outboard bearing is fully
seated against the bearing housing shoulder.
If removed, install the inboard bearing retaining
rings (2) on the output shaft (4).
When installing the shaft and bearings into
the bearing bore, push against the outer
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
race. Never hit the balls or ball cage.
Secure the shaft and bearings in the bearing hous
ing with the bearing retaining ring (1).
strongly recommended that the bearings
be replaced any time the shaft and bear
ings are removed.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear
ings should never be heated with a direct flame or
directly on a hot plate.
MAINTENANCE & REPAIR PAGE E - 25
Install the key (5) in the output shaft keyway. Posi
tion the flexible portion of the coupling assembly
(11) on the shaft as shown in Figure 9.
NOTE
The flexible portion of the coupling must be proper
ly positioned on the shaft. The heads of the caps
crews in the center of the coupling must be posi
Page 47
PA SERIESOM-07360
tioned toward the drive end of the shaft.
Align the keyway in the bushing (10) with the shaft
key, and slide the bushing onto the shaft. Rotate
the flexible portion of the coupling until the tapped
holes for the two setscrews align with those in the
bushing and install the setscrews. Position the
coupling to the dimension shown in Figure 10.
Make certain that the flexible portion of the
coupling is mounted as shown in Figure
10. The end of the shaft must protrude 1.06
to 1.19 inches (26,9 to 30,2 mm) from the
face of the bushing. This dimension is
critical. If the coupling is not properly posi
tioned on the shaft, the coupling parts may
not fully engage, or a pre‐load condition
can cause premature bearing failure.
to the engine flywheel. Secure the bearing housing
(6) to the engine bellhousing with the previously re
moved hardware.
NOTE
To ease installation, lightly lubricate the rubber por
tion of the coupling with a non‐petroleum based
lubricant such as vegetable oil or glycerin, or a sili
con‐based lubricant such as “WD40” or equivalent.
Do not use petroleum‐based lubricants, or any oth
er substance which may soften or otherwise dam
age the rubber.
Pump Shaft and Bearing Reassembly and
Installation
(Figure 7)
Inspect the impeller shaft (32) for distortion, nicks
or scratches, or damaged keyways. Dress small
nicks and burrs with a fine file or emery cloth. Re
place the shaft if defective.
With the flexible portion of the coupling and the
bushing properly positioned on the shaft, tighten
the two setscrews in an alternating sequence until
the bushing and coupling are fully secured. Torque
the setscrews to 23 ft. lbs. (280 in. lbs. or 3,2 m. kg.)
maximum.
Position the key (13) in the shaft keyway. Position
the drive sprocket over the shaft. Align the keyway
in the taperlock bushing (15) with the shaft key and
slide the bushing onto the shaft. Align the holes in
the bushing with those in the sprocket, and install
the bushing capscrews.
Position the sprocket on the shaft to the dimension
shown in Figure 10 and tighten the bushing caps
crews in an alternating sequence until the bushing
and coupling are fully secured. Torque the set
screws to 60 ft. lbs. (720 in. lbs. or 8.3 m. kg.).
If the complete coupling assembly is being re
placed, apply `Loctite Retaining Compound No.
242' or equivalent compound to the threads of the
hardware (7and 9), and secure the outer ring of the
coupling to the engine flywheel by torquing the
hardware to 45 ft. lbs. (540 in. lbs. or 6,2 m. kg.).
Position the drive assembly so the flexible portion
of the coupling seats inside the drive ring attached
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear
ings are removed.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear
ings should never be heated with a direct flame or
directly on a hot plate.
Use caution when handling hot bearings to
prevent burns.
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor
oughly filtered.
MAINTENANCE & REPAIRPAGE E - 26
Page 48
OM-07360PA SERIES
Heat the bearings to a uniform temperature no
higher than 250F (120C). Position the roller
bearing (34) on the shaft with the internal snap ring
positioned away from the impeller end of the shaft.
Slide the roller bearing onto the shaft until fully
seated against the shaft shoulder. This should be
done quickly, in one continuous motion, to prevent
the bearings from cooling and sticking on the shaft.
After the bearing has been installed and allowed to
cool, check to ensure that it has not moved away
from the shaft shoulder in shrinking. If movement
has occurred, use a suitably sized sleeve and a
press to reposition the bearing against the shaft
shoulder.
Secure the roller bearing on the shaft with the bear
ing retaining ring (55).
Slide the heated outboard bearings (30) onto the
shaft, one at a time, with the larger inner races of
each bearing positioned away from each other as
shown in Figure 6.
Locate the tab on the lockwasher that aligns with a
slot in the lock nut, and bend the tab over into the
slot.
Slide the shaft and assembled bearings into the
pedestal from the drive end until the retaining in
board bearing (30) seats against the pedestal
bore.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Press the oil seal (23) into the bearing cap (24) with
the lip positioned as shown in Figure 6. Lubricate
and install a new bearing cap O‐ring (25) and se
cure the bearing cap with the capscrews (22). Use
caution not to cut or roll the lip of the oil seal when
installing the bearing cap.
If heating the bearings is not practical, use a suit
ably sized sleeve and an arbor (or hydraulic) press
to install the bearings on the shaft.
When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
away from the shaft shoulders in shrinking. If
movement has occurred, use a suitably sized
sleeve and a press to reposition the bearings
against the shaft shoulder.
Secure the assembled shaft and bearings by
clamping on the surface between the bearings.
Use caution not to scratch or mar the part number
etched into the shaft in this area. Install the tab
washer (28) and bearing lock nut (27). Torque the
lock nut to 150 ft. lbs. (1800 in. lbs. or 20,7 m. kg.).
Press the oil seal (23) into the bearing cap (35) with
the lip positioned as shown in Figure 6. Replace
the bearing cap gasket (29) and secure the bear
ing cap with the capscrews (22). Use caution not to
cut or roll the lip of the oil seal when installing the
bearing cap.
Lubricate the pedestal as indicated in LUBRICA
TION.
Install the sprocket and hub onto the impeller shaft
as follows.
(Figures 7 and 12)
Install the key (31) in the shaft keyway. Align the
keyway in the hub with the shaft key, and slide the
hub onto the shaft with the shoulder positioned to
ward the pedestal.
Slide the sprocket over the hub, align the mounting
screw holes and install the mounting screws.
Position the hub and sprocket to the dimensions
shown in Figure 12 and torque the mounting caps
crews to 75 ft. lbs. (900 in. lbs. or 10.4 m. kg.)
MAINTENANCE & REPAIR PAGE E - 27
Page 49
Figure 12. Hub and Sprocket Installation
PA SERIESOM-07360
pulley in order to prevent side wear of the
cog belt.
Do not over‐tighten the drive belt. Over‐
tightening will cause premature belt and/or
bearing failure.
After tensioning, secure the pedestal by tightening
the jam nuts and remaining hardware on the
“pusher rods”.
Seal Reassembly and Installation
(Figures 6, 7 and 13)
Clean the bore of the seal plate (40), the seal plate
cover (45) and the shaft (32) with a cloth soaked in
fresh cleaning solvent.
Make certain that the hub and sprocket are
mounted as shown in Figure 12. This is
critical. If the sprocket is not properly posi
tioned on the shaft, the pump drive belt will
not be properly aligned, which can cause
premature belt or bearing failure.
Pedestal Assembly Installation
(Figure 2)
Use a suitable hoist and sling to position the ped
estal assembly on the base. Secure the pedestal to
the base using the previously removed hardware.
Install the pump drive belt (6, Figure 2) after assem
bling the remaining pump components.
To adjust the drive belt tension, find the center of
the belt span between the pump and engine
sprockets. Use a belt deflection gauge to measure
deflection across the width of the belt at this
point. Use the “pusher rods” to adjust belt tension
to 3/8 inch (9,5 mm) of deflection at 30 lbs. (13,6
kg.) of pressure. Do not over‐tighten the drive belt.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain
ers.
Lay the seal plate cover on a flat surface with the
inner side facing up. Press the oil seal (23) into the
seal plate cover with the lip positioned as shown in
Detail E, Figure 7.
Install a new O‐ring (37) in the groove in the seal
plate and secure the seal plate cover to the seal
plate with the hardware (46 and 47).
Since the mechanical seal is the primary seal in the
pump, special consideration should be given to
ensure proper installation.
The seal is not normally reused because wear pat
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
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.
The inner edge of the pump pulley must be
aligned with the outer edge of the drive
Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate precision
finished faces; even fingerprints on the faces can
shorten seal life. If necessary, clean the faces with a
non‐oil based solvent and a clean, lint‐free tissue.
MAINTENANCE & REPAIRPAGE E - 28
Page 50
OM-07360PA SERIES
Wipe lightly in a concentric pattern to avoid
scratching the faces.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak
age. Clean and polish the shaft sleeve, or replace it
if there are nicks or cuts on either end. If any com
ponents are worn, replace the complete seal;
never mix old and new seal parts.
RETAINER
IMPELLER
SHAFT
KEY
SLEEVE
O‐RING
IMPELLER
SHAFT
SHAFT
SLEEVE
ROTATING
ELEMENT
BELLOWS
If a replacement seal is being used, remove it from
the container and inspect the precision finished
faces to ensure that they are free of any foreign
matter.
To ease installation of the seal, lubricate the bel
lows and stationary seat O‐rings with a very small
amount of “P-80
drop of “P-80 Emulsion” on the finished faces.
Assemble the seal as follows, (see Figure 13).
SPRING
Emulsion” or water, and apply a
SEAL PLATE
STATIONARY
ELEMENT
O‐RINGS
IMPELLER
SHIMS
Figure 13. Seal Assembly
The standard seal is not designed for oper
ation at temperatures above 160F (71C).
Do not use at higher operating tempera
tures.
Lubricate the outboard stationary seat O‐ring with
a very small amount of “P-80 Emulsion” or wa
ter. Position the seal plate with the impeller side up
and press the stationary subassembly (consisting
of the stationary seat, O‐rings and stationary ele
STATIONARY
SEAT
ment) into the front of the seal plate until it seats
squarely against the bore shoulder.
Slide the seal plate and stationary portion of the
seal over the shaft until it is seated against the ped
estal (20). Be careful not to damage the stationary
element or roll or cut the lip of the oil seal (23) on the
shaft keyway. Temporarily secure the seal plate to
the pedestal with three 1/2‐inch by 2‐inch long
capscrews and nuts (not supplied).
Lubricate the seal sleeve O‐ring with a very small
amount of “P-80 Emulsion” and install it in the
groove in the I.D. of the sleeve.
MAINTENANCE & REPAIR PAGE E - 29
Page 51
PA SERIESOM-07360
Lubricate the seal sleeve with a very small amount
of “P-80
sembly (consisting of rotating element, bellows
and retainer), onto the sleeve until the rotating ele
ment is just flush with the turned end of the sleeve.
Slide the sleeve and subassembled seal onto the
shaft until the seal faces contact and the sleeve
seats against the shaft shoulder.
Install the seal spring. Lubricate the seal as indi
cated in LUBRICATION after the impeller, remain
ing pump components, bottle oiler and piping are
installed.
Impeller Installation
(Figure 6)
Emulsion” and slide the rotating subas
The impeller assembly must be machined
and balanced as shown in Figure 10.
Otherwise, premature shaft, seal or bear
ing failure, or other damage to the pump
may occur.
After machining, dynamically balance the impeller
assembly per plane 1.05 oz./in. (11.7 g/cm).
Install the same thickness of impeller adjusting
shims (42) as previously removed. Install the shaft
key (31, Figure 7) and press the impeller assembly
onto the shaft until fully seated.
A clearance of approximately .015 inch (0,38 mm)
between the impeller and the seal plate is recom
mended for maximum pump efficiency. Measure
this clearance, and add or remove impeller adjust
ing shims as required.
Proper wear ring replacement requires
machining and dynamic balancing the im
peller assembly after the wear ring is
welded to the impeller. Failure to properly
install the wear ring and machine and bal
ance the impeller assembly can result in
premature shaft, seal or bearing failure, or
other damage to the pump.
Inspect the impeller, and replace it if cracked or
badly worn. If the impeller wear ring was removed,
chill the impeller by refrigeration and use an induc
tion heater or oven to heat the new wear ring. Slide
the wear ring onto the impeller until fully seated
against the shoulder and allow it to cool.
The wear ring must seat squarely on the
impeller; otherwise binding and/or exces
sive wear will occur. Use caution when han
dling hot parts to prevent burns.
After the impeller clearance has been set, align the
pin (9) in the impeller washer (8) with the hole in the
impeller and install the washer. Apply “Never‐
Seez” or equivalent compound on the threads of
the impeller capscrew (7). Immobilize the shaft and
secure the the impeller by torquing the capscrew
to 225 ft. lbs. (2700 in. lbs. or 31 m. kg.).
Pump Casing Installation
(Figure 6)
Install the casing gasket (6) over the pump casing
studs (4 and 5). Remove the hardware temporarily
securing the seal plate to the pedestal. Use a suit
able hoist and sling to position the volute over the
impeller and slide the studs through the seal plate
and pedestal mounting holes.
(Figure 7)
Install the bottle oiler bracket (12) over the volute
studs. Secure the bracket and volute casing with
the hardware (13, 14,and 15). Reconnect the hose
(48) to the connector (11) in the seal plate and se
cure it with the hose clamp (10).
Suction Head And Wear Ring Installation
Spot weld the wear ring to the impeller at three
places, equally spaced at the vanes. After welding,
machine the wear ring as shown in Figure 11.
(Figure 6)
If the wear ring (51) was removed, chill the wear
ring by refrigeration and heat the suction head.
MAINTENANCE & REPAIRPAGE E - 30
Page 52
OM-07360PA SERIES
Slide the wear ring into the suction head until fully
seated and allow it to cool.
The wear ring must seat squarely in the
suction head; otherwise binding and/or ex
cessive wear will occur. Use caution when
handling hot parts to prevent burns.
The wear ring is secured to the suction head with
the spiral pins (50). Drill three evenly spaced
3/16‐inch diameter x 3/4‐inch deep holes through
the wear ring and into the suction head. Tap the
spiral pins into the holes until fully seated.
Install the suction head gasket (52). Position the
suction head over the studs (53) and secure it with
the hardware (14 and 15).
Turn the impeller shaft by hand and check for any
scraping or binding and correct it before putting
the pump into service.
ber Removal and Disassembly for orifice button
removal).
If the orifice button was removed, screw the new
orifice button into the linkage bar until fully seated.
Align the hole in the linkage bar with the holes in the
bracket and reinstall the pivot pin. Secure the pivot
pin with the previously removed “e‐clip”.
Adjust the orifice button seating as necessary by
screwing the orifice button into or out of the linkage
bar. Proper adjustment is achieved when the ori
fice button fully seats against the orifice before the
linkage bar on the float bottoms against the
threads on the orifice button. When adjustment is
complete, install and tighten the lock washer and
hex nut securing the orifice button.
Install the strainer (6) and priming chamber gasket
(4).
Lower the float into the priming chamber (5) and
secure the priming chamber with the previously re
moved hardware (2 and 3).
(Figure 8)
Discharge Check Valve Assembly and
Installation
(Figure 5)
The flapper and gasket are the only serviceable
parts of the check valve. If the flapper requires re
placement, remove the hardware securing the
cover and gasket. Separate the valve cap and re
place the flapper.
Install the valve cap gasket and secure the cap with
the previously removed hardware.
Support the discharge check valve assembly (5)
using a sling and a suitable lifting device. Secure
the discharge check valve assembly and gasket
(6) to the pump assembly (1) using the hardware
(2, 3 and 4).
Priming Chamber Assembly And Installation
(Figure 9)
Clean and inspect the components of the priming
valve (1). Inspect the linkage and ensure the orifice
button squarely engages the valve seat. Replace
the orifice button if required (see Priming Cham
Install the baffle (7) and gasket (8) and use a sling
and suitable lifting device to position the priming
chamber assembly against the pump suction
flange. Secure the priming chamber assembly with
the hardware (4 and 5).
Reconnect both the suction piping and the air dis
charge tubing to the priming chamber assembly.
LUBRICATION
Seal Assembly
(Figure 7)
Fill the bottle oiler (54) and seal cavity with approxi
mately 85 ounces (2,5 liters) of SAE No. 30 non‐de
tergent oil. Check the oil level regularly and refill as
required.
Bearings
(Figure 7)
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauges (18) and maintain it at the
midpoint of the gauges. When lubrication is re
quired, remove the vented plug (19) and add SAE
MAINTENANCE & REPAIR PAGE E - 31
Page 53
No. 30 non‐detergent oil through the opening.
Clean and reinstall the vented plug. Do not over‐lu
bricate. Over‐lubrication can cause the bearings to
over‐heat, resulting in premature bearing failure.
NOTE
The white reflector in the sight gauge must be posi
tioned horizontally to provide proper drainage.
Under normal conditions, drain the bearing hous
ing once each year and refill with approximately 14
ounces (0,4 liter) of clean oil. Change the oil more
frequently if the pump is operated continuously or
installed in an environment with rapid temperature
change.
PA SERIESOM-07360
Monitor the condition of the bearing lubri
cant regularly for evidence of rust or mois
ture condensation. This is especially im
portant in areas where variable hot and
cold temperatures are common.
For cold weather operation, consult the factory or a
lubricant supplier for the recommended grade of
oil.
Engine
Consult the literature supplied with the engine, or
contact your local engine representative.
MAINTENANCE & REPAIRPAGE E - 32
Page 54
For Warranty Information, Please Visit
www.grpumps.com/warranty
or call:
U.S.: 419-755-1280
Canada: 519-631-2870
International: +1-419-755-1352
GORMAN‐RUPP PUMPS
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