GORMAN-RUPP PAH SERIES User manual

OM-06469-02
September 20, 2016
GORMAN‐RUPP PUMPS
www.grpumps.com
2016 Gorman‐Rupp Pumps Printed in U.S.A.
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
PAH SERIESPUMP
MODEL
PAH3A60-6068H

Register your new
Gorman‐Rupp pump online at
www.grpumps.com
Valid serial number and e‐mail address required.
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:
The engine exhaust from this
product contains chemicals
known to the State of California to
cause cancer, birth defects or
other reproductive harm.

TABLE OF CONTENTS
i
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 - 4..............................................................
Sealing PAGE B - 4...............................................................
Suction Lines In Sumps 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.................................................
COLD WEATHER 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.....................................................
Priming PAGE C - 2...............................................................
ROUTINE OPERATION PAGE C - 3.....................................................
OPERATION IN EXTREME HEAT PAGE C - 3............................................
OPERATIONAL CHECKS PAGE C - 3...................................................
Leakage PAGE C - 3..............................................................
Pump Vacuum Check PAGE C - 3..................................................
Liquid Temperature And Overheating PAGE C - 3.....................................
Strainer Check PAGE C - 3.........................................................

TABLE OF CONTENTS
(continued)
ii
STOPPING PAGE C - 4................................................................
Manual Stopping PAGE C - 4.......................................................
Automatic Stopping PAGE C - 4....................................................
Safety Shutdown System PAGE C - 4...............................................
PERIODIC CHECKS PAGE C - 4.......................................................
Seal Cavity and Bearing Lubrication PAGE C - 4......................................
Bearing Temperature Check PAGE C - 5.............................................
Engine Fuel Filter PAGE C - 5......................................................
Engine Oil PAGE C - 5.............................................................
Air Compressor PAGE C - 5........................................................
COLD WEATHER PRESERVATION PAGE C - 5...........................................
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........................................
PARTS LISTS:
Pump Model PAGE E - 3..........................................................
Power Unit Kit PAGE E - 5.........................................................
Pump End Assembly PAGE E - 7...................................................
Repair Rotating Assembly PAGE E - 9...............................................
Priming Chamber Kit PAGE E - 10...................................................
Priming Chamber Assembly PAGE E - 11.............................................
Drive Assembly PAGE E - 12........................................................
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E - 13.........................
Priming Chamber Removal And Disassembly PAGE E - 14..............................
Discharge Check Valve Removal and Disassembly PAGE E - 14.........................
Suction Head and Wear Ring Removal PAGE E - 14....................................
Pump Casing Removal PAGE E - 15.................................................
Draining Oil From Seal Cavity PAGE E - 15............................................
Impeller Removal PAGE E - 15......................................................
Seal Removal PAGE E - 15..........................................................
Separating Pedestal And Drive Assembly From Engine PAGE E - 15.....................
Shaft and Bearing Removal and Disassembly PAGE E - 16.............................
Shaft and Bearing Reassembly and Installation PAGE E - 17............................
Securing Pedestal And Drive Assembly To Engine PAGE E - 18..........................
Seal Reassembly and Installation PAGE E - 19........................................
Impeller Installation And Adjustment PAGE E - 20......................................
Pump Casing Installation PAGE E - 20................................................
Suction Head and Wear Ring Installation PAGE E - 20..................................
Discharge Check Valve Reassembly And Installation PAGE E - 20.......................
Priming Chamber Assembly And Installation PAGE E - 21...............................
LUBRICATION PAGE E - 21.............................................................
Seal Assembly PAGE E - 21.........................................................
Bearings PAGE E - 21..............................................................
Engine PAGE E - 21................................................................

PAH SERIES OM-06469
PAGE I - 1INTRODUCTION
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.
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.
If there are any questions regarding the pump or
its application which are not covered in this man
ual or in other literature accompanying this 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: [phone]
or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: [phone]
For information or technical assistance on the
power source, contact the power source manufac
turer's local dealer or representative.
HAZARD AND INSTRUCTION
DEFINITIONS
The following are used to alert maintenance per
sonnel to procedures which require special atten
tion, to those which could damage equipment, and
to those which could be dangerous to personnel:
Immediate hazards which WILL result in
severe personal injury or death. These
instructions describe the procedure re
quired and the injury which will result
from failure to follow the procedure.
Hazards or unsafe practices which
COULD result in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result from failure to follow
the procedure.
Hazards or unsafe practices which COULD
result in minor personal injury or product
or property damage. These instructions
describe the requirements and the possi
ble damage which could result from failure
to follow the procedure.
NOTE
Instructions to aid in installation, operation, and
maintenance or which clarify a procedure.

PAH SERIES OM-06469
PAGE A - 1SAFETY
SAFETY ‐ SECTION A
This information applies to Prime Airer
Series pumps. Refer to the manual ac
companying the engine before attempt
ing to begin operation.
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.
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.
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.
Do not attempt to disengage any part of
an overheated pump unit. Vapor pres
sure within the pump casing can eject
these parts with great force when they
are disengaged. Allow the pump to
completely cool before servicing it.
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.
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

PAH SERIESOM-06469
PAGE A - 2 SAFETY
hose connections are tight, properly
supported and secure before operation.
Do not operate the pump against a
closed discharge valve. If operated
against a closed discharge valve, pump
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.
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 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.
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 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
safe operating limits that should not be
exceeded. Refer to the performance
curve on page E-1 for the maximum
continuous operating speed for this
pump.
The engine used on this unit is equipped
with an exhaust filter which reduces the
amount of nitrogen oxide produced while
burning away particulate matter that would

PAH SERIES OM-06469
PAGE A - 3SAFETY
otherwise be expelled into the atmo
sphere. The resultant soot and ash are
trapped in the filter. The Engine Control
Unit (ECU) will cause the filter to perform a
self‐cleaning function (regeneration) peri
odically to keep the soot collected by the
filter at manageable levels.
Because the operator can choose to post
pone the regeneration process, the ECU
could eventually force a regeneration, re
sulting in loss of performance or even a to
tal shut down of the engine. Refer to the
manual accompanying the engine for a de
tailed explanation of the regeneration pro
cess and the indicator symbols that will
display on the Engine Control Unit. Follow
all of the instructions in the engine manual
to ensure uninterrupted operation of the
engine.

PAH SERIES OM-06469
PAGE B - 1INSTALLATION
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
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.
OUTLINE DRAWING
Figure 1. Pump Model PAH3A60-6068H
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:
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.

OM-06469 PAH SERIES
PAGE B - 2 INSTALLATION
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.
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.
POSITIONING PUMP
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam
age to equipment. Attach lifting equip
ment to the lifting device fitted to the
pump. If chains or cable are wrapped
around the pump to lift it, make certain
that they are positioned so as not to
damage the pump, and so that the load
will be balanced. The bail is intended for
use in lifting the pump assembly only.
Suction and discharge hoses and pip
ing must be removed from the pump be
fore lifting.
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.
The pump assembly can be seriously
damaged if the chains or cables used to lift
and move the unit are improperly wrapped
around the pump.
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.