GORMAN-RUPP PUMPS 62 1/2A1-CH13 Series Application guide

OM---05121---OE01
July 26, 2000
ACEG
THE GORMAN-RUPP COMPANY DMANSFIELD, OHIO
GORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
ECopyright by the Gorman-Rupp Company
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
60 SERIES PUMP
62 1/2A1--CH13
62 1/2A1--CH13 S/G
MODELS

The engine exhaust from this
product contains chemicals
known tothe State of Californiato
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 --- 2............................................
Battery Specifications And Installation PAGE B --- 3....................................
POSITIONING PUMP PAGE B --- 3.......................................................
Lifting PAGE B --- 3.................................................................
Mounting PAGE B --- 3.............................................................
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 --- 4...........................................................
Fittings PAGE B --- 4...............................................................
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................................................................
OPERATION --- SE CTION C PAGE C --- 1......................................
PRIMING PAGE C --- 1.................................................................
STARTING PAGE C --- 1................................................................
OPERATION PAGE C --- 1..............................................................
Leakage PAGE C --- 1..............................................................
Liquid Temperature And Overheating PAGE C --- 2.....................................
Strainer Check PAGE C --- 2.........................................................
Pump Vacuum Check PAGE C --- 2..................................................
STOPPING PAGE C --- 2................................................................
Cold Weather Preservation PAGE C --- 2..............................................
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 PAGE E --- 3.............................................................
Pump Model 62 1/2A1 --- CH13 PAGE E --- 3...........................................
Pump Model 62 1/2A1 --- CH13 S/G PAGE E --- 5.......................................
Pump End Assy PAGE E --- 7........................................................

TABLE OF CONTENTS
(continued)
ii
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E --- 8.........................
Exhaust Primer Disassembly PAGE E --- 8............................................
Pump Disassembly PAGE E --- 8.....................................................
Seal Removal and Disassembly PAGE E --- 8..........................................
Seal Reassembly and Installation PAGE E --- 9........................................
Pump Reassembly PAGE E --- 10.....................................................
Exhaust Primer Reassembly PAGE E --- 11.............................................
LUBRICATION PAGE E --- 11.............................................................
Seal Assembly PAGE E --- 11.........................................................
Engine PAGE E --- 11................................................................

60 SERIES OM--05121
PAGE I -- 1INTRODUCTION
INTRODUCTION
This Installation, Operation, and Maintenance
manual is designed to help you achieve the best
performance and longest life from your Gorman-
Rupp pump.
This pump isa60Series, centrifugalmodel with an
enclosed impeller. The pump is designed for high
pressure distribution of clear water in irrigation or
fire fighting service. It is closed coupled to a single
cylinder, air cooled, gasoline powered Kohler pull
start orstarter generatorengineandmounted ona
common hand-carry base. Standard equipment
includes an exhaust primer system, spark arrest-
ingmuffler,suctionstrainer,dischargecheckvalve,
discharge pressure gauge and fire hose thread
adaptors.Thebasicmaterialofpumpconstruction
is aluminum with cast iron wear ring and a self-lu-
bricated mechanical seal.
If there are any questions regarding the pump or its application which are not coveredin thismanual orin
other literature accompanying this unit, please contact your Gorman-Rupp distributor, or write:
The Gorman-Rupp Company or Gorman-Rupp of Canada Limited
P.O. Box 1217 70 Burwell Road
Mansfield, Ohio 44901--1217 St. Thomas, Ontario N5P 3R7
The following are used to alert maintenance personnel to procedures which require special attention, to
those which could damage equipment, and to those which could be dangerous to personnel:
Immediate hazards which WILL resultin
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.
HazardsorunsafepracticeswhichCOULD
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.

60 SERIES OM--05121
PAGE A -- 1SAFETY
SAFETY - SECTION A
Thisinformationappliesto60Seriesen-
gine driven pumps. Refer to the manual
accompanying the engine before at-
tempting to begin operation.
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,thismanualcannotpossiblyantici-
pate and provide detailed instructions
and precautions for every situation that
might occur during maintenance of the
unit.Therefore,it isthe responsibilityof
the owner/maintenance personnel to
ensurethatonlysafe, 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.
Beforeattemptingtoopenorservicethe
pump:
1. Familiarize yourself with this man-
ual.
2. Disconnect the spark plug wire 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 designed to handle clear
water for high pressure distribution. Do
not attempt to pump volatile, corrosive,
or flammable liquids which may dam-
age thepump orendanger personnel as
a result of pump failure.
Do not operate the pump against a
closeddischarge valveforlongperiods
oftime.Ifoperatedagainstacloseddis-
charge valve, pump components will
deteriorate, and the liquid could come
to a boil, build pressure, and cause the
pump casing to rupture or explode.
Afterthepump hasbeeninstalled,make
certain that the pump and hose connec-
tions are tight, properly supported and
secure before operation.
Overheated pumps can cause severe
burnsandinjuries.Ifoverheatingofthe
pump occurs:
1. Stop the pump immediately.
2. Ventilate the area.
3. Allowthepumptocompletelycool.
4. Check the temperature before
opening any covers, plates,
gauges, or plugs.
5. Vent the pump slowly and cau-
tiously.
6. Refertoinstructionsinthismanual
before restarting the pump.

60 SERIESOM--05121
PAGE A -- 2 SAFETY
Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over-
heatedpump. Vapor pressure within the
pump can cause parts being disen-
gaged to be ejected withgreat force.Al-
low the pump to cool before servicing.
Do not operate an internal combustion
engine in an explosive atmosphere.
When operating internal combustion
engines in an enclosed area, make cer-
tain that exhaust fumes are piped to the
outside. These fumes contain carbon
monoxide, a deadly gas that is color-
less, 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.Alwaysusethecorrecttypeoffuel.
Never tamper with the governor to gain
more power. The governor establishes
safe operating limits that should not be
exceeded. Continuous duty perform-
ance is limited to 3600 RPM; however
the engine may be run at 3800 RPM dur-
ing intermittent fire fighting service.

60 SERIES OM--05121
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
staticliftapplicationwhere thepump ispositioned
above the free level of liquid to be pumped.
If installedinaflooded suctionapplicationwhere
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,
besuretolimittheincomingpressureto50%ofthe
maximum permissible operating pressure as
shown on the pump performance curve (see Sec-
tion E, Page 1).
Forfurtherassistance, contact yourGorman-Rupp
distributor or the Gorman-Rupp Company.
Pump Dimensions
See Figures 1 and 2 for the approximate physical
dimensions of this pump.
OUTLINE DRAWING
Figure 1. Pump Model 62 1/2A1---CH13

OM--05121 60 SERIES
PAGE B -- 2 INSTALLATION
OUTLINE DRAWING
Figure 2. Pump Model 62 1/2A1---CH13 S/G
PREINSTALLATION INSPECTION
The pump assemblywas inspectedand tested be-
fore shipment from the factory. Before installation,
inspect the pump for damage whichmay haveoc-
curred during shipment. Check as follows:
a. Inspect the pump and engine 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.
c. Carefully read all tags, decals, and markings
onthepumpassembly,and performallduties
indicated.
d. Check levels and lubricate as necessary. Re-
fer to LUBRICATION in the MAINTENANCE
AND REPAIR section of this manual and per-
form duties as instructed.
e. If the pump and engine have been stored for
more than 12 months, some of the compo-
nents or lubricants may have exceeded their
maximumshelflife.Thesemustbeinspected
or replaced to ensure maximum pump serv-
ice.
f. Check to ensure the following standard
equipment items are included with the pump
assembly:
DExhaust primer assembly.
DBrassfirehoseadaptors forthe pumpsuc-
tion and discharge ports.
DDischarge pressure gauge.
DSuction strainer assembly.
If the maximum shelf life has been exceeded, or if
anything appears to be abnormal, contact your

60 SERIES OM--05121
PAGE B -- 3INSTALLATION
Gorman-Rupp distributor or the factory to deter-
minethe repairor updating policy. Donotputthe
pump into service until appropriate action has
been taken.
Battery Specifications And Installation
Unless otherwise specified on the pump order, the
engine battery was not included with the starter/
generatorunit.Refertothefollowingspecifications
when selecting a battery.
Table 1. Battery Specifications
Crank
@0
_F
Reserve
Capacity
(Minutes)
@80
_FOverall
Dims.
(Inches)
220---255 41
7.75L
Cold
Amps
Approx.
Amp/
Hr.
Rating
33 5.13W
7.38H
x
x
Voltage
12 Volts
Refer to the information accompanying the battery
and/orelectrolytesolutionforactivation andcharg-
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 jellyto retard corro-
sion. Connect and tighten the positive cable first,
then the negative cable.
POSITIONING PUMP
Lifting
This pump is designed to be hand carried using
the2-mancarryhandles.Thetotalpumpweightfor
the pull start unit is approximately 165 pounds
(74,8 kg) and approximately 195 pounds (88,5
kg) for the starter/generator unit, not includingac-
cessories or suction strainer. Customer installed
equipment such as suction and discharge piping
must be removed before attempting to lift.
Mounting
Locatethepumpinanaccessibleplaceascloseas
practical tothe 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 or to eliminate vibra-
tion.
To ensure sufficient lubrication and fuel supply to
the engine, do not position the pump and engine
more than 15_off horizontal for continuous opera-
tion. The pump and engine may be positioned up
to 30_off horizontal for intermittent operation
only;however,theenginemanufacturershouldbe
consulted for continuous operation at angles
greater than 15_.
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 rec-
ommendationson Page E-1to besure youroverall
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
compatiblewiththeliquidbeingpumped.Ifhoseis
used insuction lines, it must be the rigid-wall, rein-
forced type to prevent collapseunder 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-
tiallyincreasefriction loss.Ifelbowsarenecessary,
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 pulla 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

OM--05121 60 SERIES
PAGE B -- 4 INSTALLATION
linesareused,theyshouldhaveadequatesupport
to secure them when filled with liquid and under
pressure.
Gauges
Most pumps are drilled and tapped for installing
discharge pressure and vacuum suction gauges.
If these gauges are desired for pumps that arenot
tapped, drill and tap the suction and discharge
lines not less than 18 inches (457,20 mm) from the
suction and discharge ports and install the
gauges. Installation closer to thepump mayresult
in erratic readings.
SUCTION LINES
Toavoidairpocketswhichcouldaffectpumpprim-
ing, the suction line must be as short and direct as
possible.Whenoperationinvolvesasuctionlift,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 bethe 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 ofthe 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
If a strainer is furnished with the pump, be certain
touseit;anysphericalsolidswhichpassthrougha
strainer furnished with the pump will also pass
through the pump itself.
If a strainer is not furnished with the pump, but is
installed by the pump user, 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 that the openings will not permit passage
of solids larger than the solids handling capability
of the pump.
This pump is designed to handle up to 5/16-inch
(7,9 mm) diameter spherical solids.
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 distanceequalto 1-1/2times thediame-
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 carryair downinto
the sump, and air entering the suction line will re-
duce pump efficiency.
If it is necessary to position inflow close to the suc-
tioninlet, installa 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,
theflowpathsmayinteract,reducingtheefficiency
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
criticaltoefficientpump operation. Figure3 shows
recommended minimum submergence vs. veloc-
ity.
NOTE
The pipe submergence required may be reduced
by installing a standard pipe increaser fitting at the
end of thesuction line. The larger opening size will

60 SERIES OM--05121
PAGE B -- 5INSTALLATION
reduce the inlet velocity. Calculate the required
submergence using the following formula based on the increased opening size (area or diameter).
Figure 3. 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
If a throttling valve is desired in the discharge line,
useavalveaslargeasthelargestpipetominimize
friction losses. Never install a throttling valve in a
suction line.
Withhighdischargeheads,itisrecommendedthat
a throttling valve and a system check valve be in-
stalled in the discharge line to protect the pump
from excessive shock pressure and reverse rota-
tion when it is stopped.
Iftheapplication involves a highdischarge
head, gradually close the discharge
throttling valve before stopping the pump.

OM--05121
60 SERIES
OPERATION PAGE C -- 1
OPERATION --- SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
This pump is designed to handle clear
water for high pressure distribution. Do
not attempt to pump volatile, corrosive,
or flammable liquids which may dam-
age thepump orendanger personnel as
a result of pump failure.
Never tamper with the governor to gain
more power. The governor establishes
safe operating limits that should not be
exceeded. Continuous duty perform-
ance is limited to 3600 RPM; however
the engine may be run at 3800 RPM dur-
ing intermittent fire fighting service.
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).
Exhaust Primer
Since this pump is not self-priming, it is equipped
with an exhaust primer assembly (see Figure 1).
GAS
COCK
HANDLE
Figure 1. Exhaust Primer Assembly
The exhaust primer utilizes engine exhaust gases,
directedthrougha venturi,to createa vacuum and
draw air out of the suction line and pump casing.
The exhaust primer is capable of priming a pump
with a maximum priming lift of 25 feet within 1 min-
ute;lesstimewillberequiredforprimingatalesser
lift. If the pump does not prime in a reasonable
length of time, check the suction line for leaks. To
prime the pump, close the throttling valve in the
discharge line. Close the exhaust primer handle
(see Figure 1), and open the cock in the priming
line.Consultthestartinginstructionsinthismanual
as well as the engine operating manual, and start
the engine. Operate the engine at maximum gov-
erned speed and allow the pump to prime until liq-
uid flows continuously from the exhaust primer
nozzle. When the pump is fully primed, open the
exhaust primer handle, and close the cock in the
priming line. Once fully primed, reduce engine
speed and partially open the discharge throttling
valve. The discharge line should be filled slowly to
prevent damage to the piping, gaskets, and other
devices, resulting from the initial shock of liquid fill-
ingthelines.Whenthedischargelineiscompletely
filled, adjust the discharge throttling valve to the
desired flow rate.
STARTING
Consult the operations manual furnished with the
engine.
OPERATION
Leakage
No leakage should be visible at pump mating sur-
faces, or at pump connections or fittings. Keep all

OM--05121 60 SERIES
OPERATIONPAGE C -- 2
lineconnectionsandfittingstightto maintainmaxi-
mum pump efficiency.
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160_F(71,1_C). Do not apply it at a higheroperat-
ing 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 and allow it to cool before servicing it. Refill
the pump casing with cool liquid.
Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over-
heatedpump. Vapor pressure within the
pump can cause parts being disen-
gaged to be ejected withgreat force.Al-
low the pump to cool before servicing.
Strainer Check
If a suction strainer has been shipped with the
pump or installed by the user, check the strainer
regularly, and clean it as necessary. The strainer
shouldalsobecheckedifpumpflowratebeginsto
drop. If a vacuum suction gauge has been in-
stalled, monitor and record the 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, liquidpressuremust belimited to50% ofthe
maximum permissible operating pressure shown
on the pump performance curve. (See Section E,
Page 1.)
Pump Vacuum Check
Withthepumpinoperative,installavacuumgauge
in the system, using pipe dope on the threads.
Block the suction line andstart the pump. Atoper-
ating speed the pump should pull a vacuum of 20
inches (508,0 mm) or more of mercury. If it does
not, check for air leaks in the seal, gasket, or dis-
charge valve.
Openthesuctionline,andreadthevacuumgauge
with the pump primed and at operation speed.
Shut off the pump. The vacuumgauge readingwill
immediately drop proportionate to static suction
lift,andshouldthenstabilize.Ifthevacuumreading
falls off rapidly after stabilization, an air leak exists.
Before checking for the source of the leak, check
the point of installation of the vacuum gauge.
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.
On engine driven pumps, reduce the throttle
speedslowlyandallowtheenginetoidlebrieflybe-
fore stopping.
Iftheapplication involves a highdischarge
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, disconnect the spark
plug wire toensure that the pumpwillremaininop-
erative.
Cold Weather Preservation
In below freezing conditions, drain the pump to
preventdamagefromfreezing. Also,cleanoutany
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. Toprevent
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.

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS TO
PRIME
Strainer clogged. Check strainer and clean if neces-
sary.
Suction lift or discharge head too high. Check piping installation and install
bypass line if needed. See INSTAL-
LATION.
Leakingor worn seal or pumpgasket. Check pump vacuum. Replace
leakingorwornsealorgasket.
Lining of suction hose collapsed. Replace suction hose.
Air leak in suction line. Correct leak.
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
Air leak in suction line. Correct leak.
Lining of suction hose collapsed. Replace suction hose.
Auxiliary priming device faulty or im-
properly installed. Repair priming device or check in- stallation.
Integral discharge check valve clogged
or binding. Clean valve.
Suction intake not submerged at
proper level or sump too small. Check installation and correct sub- mergence as needed.
Not enough liquid in casing. Add liquid to casing. See PRIMING.
OM--0512160 SERIES
TROUBLESHOOTING PAGE D -- 1
TROUBLESHOOTING --- SECTION D
Review all SAFETY information in Section A.
Beforeattempting toopenorservice the
pump:
1. Familiarize yourselfwith thismanual.
2. Shut down the engine and discon-
nect the spark plug wire to ensure
that the pump will remain inopera-
tive.
3. Allow the pump to completely cool if
overheated.
4. Check the temperature before open-
ing any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
Measure lift w/vacuum gauge. Re-
duce lift and/or friction losses in
suction line.
Suction lift too high.
Dilute if possible.Liquid solution too thick.
EXCESSIVE NOISE Cavitation in pump. Reduce suction lift and/or friction
losses in suction line. Record vac-
uum and pressure gauge readings
and consult local representative or
factory.
Clean out debris; replace damaged
parts.
Impeller clogged or damaged.
Secure mounting hardware.Pump or drive not securely mounted.
Locate and eliminate source of air
bubble.
Pumping entrained air.
Checkengineoutput.Pump speed too high.
Pump speed too slow. Check engine output; consult en-
gine operation manual.
Leakingor worn seal or pumpgasket. Check pump vacuum. Replace
leakingorwornsealorgasket.
Exceedingoperatinglimits. See performance curves in PUMP
MAINTENANCE AND REPAIR.
Free impeller of debris.Impeller clogged.
Impellerorotherwearingpartsworn
or damaged. Replace worn or damaged parts. Check that impeller is properly
centered and rotates freely.
OM--05121 60 SERIES
TROUBLESHOOTINGPAGE D -- 2

OM--0512160 SERIES
TROUBLESHOOTING PAGE D -- 3
PREVENTIVE MAINTENANCE
Sincepumpapplicationsareseldomidentical,and
pump wear is directly affected by such things as
the abrasive qualities, pressure and temperature
oftheliquidbeingpumped,thissectionisintended
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
equipped) between regularly scheduled inspec-
tions can indicate problems that can be corrected
before system damage or catastrophic failure oc-
curs.Theappearanceofwearingpartsshouldalso
bedocumentedat eachinspectionforcomparison
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
beforefailureoccurs,reducingunscheduleddown
time.
For new applications, a first inspection of wearing
partsat250hourswillgiveinsightintothewearrate
foryourparticularapplication.Subsequentinspec-
tions should be performed at the intervals shown
on the chart below. Critical applications should be
inspected more frequently.
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
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.
Preventive Maintenance Schedule
Item Daily Weekly Monthly Semi-
Annually Annually
Service Interval*

OM--05121
60 SERIES
MAINTENANCE & REPAIR PAGE E -- 1
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 MODELS 62 1/2A1--CH13 AND 62 1/2A1--CH13 S/G
Based on 70_F(21_C) clear water at sea level
with minimumsuction lift. Since pumpinstallations
areseldomidentical,yourperformancemaybedif-
ferent due to such factors as viscosity, specific
gravity, elevation, temperature, and impeller trim.
If your pump serial number is followed by an “N”,
your pump is NOT astandardproductionmodel.
Contact the Gorman-Rupp Company to verifyper-
formance or part numbers.
Never tamper with the governor to gain
more power. The governor establishes
safe operating limits that should not be
exceeded. Continuous duty perform-
ance is limited to 3600 RPM; however
the engine may be run at 3800 RPM dur-
ing intermittent fire fighting service.

60 SERIESOM--05121
MAINTENANCE & REPAIRPAGE E -- 2
SECTION DRAWING
Figure 1. Pump Model 62 1/2A1---CH13

ITEM
NO. PART NAME PART NUMBER MAT’L CODE QTY ITEM NO. PART NAME PART NUMBER MAT’L CODE QTY
OM--05121
60 SERIES
MAINTENANCE & REPAIR PAGE E -- 3
PARTS LIST
Pump Model 62 1/2A1 --- CH13
(From S/N 1205888 up)
If your pump serialnumber isfollowed byan “N”, your pumpis NOTa standard production model. Contact
the Gorman-Rupp Company to verify part numbers.
1 PUMP END ASSY 62 1/2A1---(CH13) 1
2 KOHLER CH13 PT ENG 29127---091 --- --- --- 1
3 HEX HD CAPSCREW B0403 15991 6
4 LOCK WASHER J04 15991 6
5 EXHAUST PRIMER 46112---705 --- ------ 1
6 ---EXH PRIMER VLVE BODY38343---019 10000 1
7---EXH PRIMER GASKET 38683---272 18000 1
8 ---SWIVEL FITTING 26571---108 ------ --- 1
9 ---EJECTOR JET 38634---020 14000 1
10 ---EJECTOR BODY 3552 14000 1
11 ---VENTURI 2345A 14000 1
12 ---90_SWIVEL FITTING 26571---002 ------ --- 1
13 ---HOSE ADAPTOR 26523---334 --- ------ 2
. 14 ---.38 I.D. X 12” HOSE 18513---302 --- --- --- 1
15 --- GAS COCK S2 --- --- --- 1
16 ---VALVE HANDLE 1458A 15990 1
17 ---EXH PRIME DECAL 6588AS --- ------ 1
18 ---HEX NIPPLE 26112---053 ------ --- 1
19 ---VALVE CAP 1467 10010 1
20 ---COTTER PIN M0406 15990 2
21 MM5 X 10 CAPSCREW 22645---810 --- --- --- 4
22 LOCK WASHER J#10 15991 4
23 HAND CARRY DECAL 2613FT --- ------ 2
24 MUFFLER GUARD 42331---064 24150 1
25 MUFFLER ASSY 46211---028 ------ --- 1
26 MUFFLER HARDWARE KIT 29187---201 --- ------ 1
27 NAME PLATE 2613ER --------- 1
28 WARNING DECAL 2613FE --- --- --- 1
29 ROLLOVER BASE 41583---344 24150 1
30 HEX HD CAPSCREW B0604 15991 4
31 FLAT WASHER K06 15991 4
32 LOCK WASHER J06 15991 4
33 STUD C0606 1/2 15991 4
34 HEX NUT D06 15991 4
35 LOCK WASHER J06 15991 4
36 SUCTION STICKER 6588AG --------- 1
37 COUPLING 2469 14000 1
38 RUBBER FOOT MTG KIT 48152---603 --- --- --- 1
39 DISCHARGE STICKER 6588BJ --------- 1
40 COUPLING 2469 14000 1
41 STREET ELBOW AGS04 11999 1
42 PRESSURE GAUGE S180 --- --- --- 1
NOT SHOWN:
STRAINER 26841---010 ------ --- 1
BRASS ADAPTOR 26115---011 --- ------ 1
PIPE PLUG P04 15079 1
OPTIONS:
REP STRAINER KIT 48221---045 --- --- --- 1
REP MUFFLER KIT 48222---004 --------- 1
WHEEL KIT GRP30 --- 57 --- --- --- 1
INDICATES PARTS RECOMMENDED FOR STOCK