Page 1
ACE
OM-00830-02
January 8, 1980
Rev. F 08‐29‐12
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
80 SERIES PUMP
MODEL
82H20-B
THE GORMAN‐RUPP COMPANY D MANSFIELD, OHIO
www.grpumps.com
GORMAN‐RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
e1980 The Gorman‐Rupp Company
Page 2
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:
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 - 2............................................
POSITIONING PUMP PAGE B - 2.......................................................
Lifting PAGE B - 2.................................................................
Mounting PAGE B - 2.............................................................
SUCTION AND DISCHARGE PIPING PAGE B - 2.........................................
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 - 3...............................................................
Suction Lines In Sumps PAGE B - 3.................................................
Suction Line Positioning PAGE B - 4................................................
DISCHARGE LINES PAGE B - 4........................................................
Siphoning PAGE B - 4.............................................................
Valves PAGE B - 4................................................................
Bypass Lines PAGE B - 5..........................................................
ALIGNMENT PAGE B - 5..............................................................
Coupled Drives PAGE B - 5........................................................
V‐Belt Drives PAGE B - 6...........................................................
OPERATION - SECTION C PAGE C - 1......................................
PRIMING PAGE C - 1.................................................................
STARTING PAGE C - 1................................................................
Rotation PAGE C - 1..............................................................
OPERATION PAGE C - 2..............................................................
Lines With a Bypass PAGE C - 2....................................................
Lines Without a Bypass PAGE C - 2.................................................
Leakage PAGE C - 2..............................................................
Liquid Temperature And Overheating PAGE C - 2.....................................
Strainer Check PAGE C - 2.........................................................
Pump Vacuum Check PAGE C - 2..................................................
STOPPING PAGE C - 3................................................................
Cold Weather Preservation PAGE C - 3..............................................
BEARING TEMPERATURE CHECK PAGE C - 3..........................................
TROUBLESHOOTING - SECTION D PAGE D - 1..............................
PREVENTIVE MAINTENANCE PAGE D - 3...............................................
i
Page 4
TABLE OF CONTENTS
(continued)
PUMP MAINTENANCE AND REPAIR ‐ SECTION E PAGE E - 1.................
PERFORMANCE CURVE PAGE E - 1...................................................
PARTS LIST:
Pump Model PAGE E - 3..........................................................
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E - 4.........................
Pump Casing Removal PAGE E - 4.................................................
Impeller Removal PAGE E - 5......................................................
Seal Removal and Disassembly PAGE E - 5..........................................
Shaft And Bearing Removal And Disassembly PAGE E - 6.............................
Shaft And Bearing Reassembly And Installation PAGE E - 7............................
Seal Reassembly and Installation PAGE E - 8........................................
Impeller Installation and Adjustment PAGE E - 9......................................
Pump Casing Installation PAGE E - 9...............................................
Suction Check Valve Installation PAGE E - 10.........................................
Final Pump Assembly PAGE E - 10..................................................
LUBRICATION PAGE E - 10.............................................................
Seal Assembly PAGE E - 10.........................................................
Bearings PAGE E - 10..............................................................
Power Source PAGE E - 10.........................................................
ii
Page 5
80 SERIES
OM-00830
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 pump is an 80 Series, semi‐open impeller, self‐
priming centrifugal model. The pump is designed
for straight‐in suction where the medium being
pumped enters directly into the impeller eye. The
basic material of construction for wetted parts is
gray iron, with a steel impeller shaft.
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 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.
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: (419) 755-1011
or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: (519) 631-2870
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.
PAGE I - 1INTRODUCTION
Page 6
80 SERIES
OM-00830
SAFETY ‐ SECTION A
This information applies to 80 Series ba
sic pumps. Gorman‐Rupp has no con
trol over or particular knowledge of the
power source which will be used. Refer
to the manual accompanying the 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.
Before attempting to open or service the
pump:
non‐volatile, non‐flammable liquids
containing specified entrained solids.
Do not attempt to pump volatile or flam
mable liquids which may damage the
pump or endanger personnel as a result
of pump failure.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam
age to equipment. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting.
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.
1. Familiarize yourself with this man
ual.
2. Lock out or disconnect the power
source 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 most
Do not operate the pump without the
shields and/or guards in place over the
drive shaft, belts, and/or couplings, or
other rotating parts. Exposed rotating
parts can catch clothing, fingers, or
tools, causing severe injury to person
nel.
Do not operate the pump against a
closed discharge valve for long periods
of time. If operated against a closed dis
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.
PAGE A - 1SAFETY
Page 7
80 SERIESOM-00830
Overheated pumps can cause severe
burns and injuries. If overheating of the
pump occurs:
1. Stop the pump immediately.
2. Ventilate the area.
3. Allow the pump to completely cool.
4. Check the temperature before
opening any covers, plates,
gauges, or plugs.
5. Vent the pump slowly and cau
tiously.
6. Refer to instructions in this manual
before restarting the pump.
Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over
heated pump. Vapor pressure within the
pump can cause parts being disen
gaged to be ejected with great force. Al
low the pump to completely cool before
servicing.
Overheating may produce dangerous
fumes. Use extreme caution when vent
ing the pump, or when removing covers,
plates, plugs, or fittings.
Never run this pump backwards. Be cer
tain that rotation is correct before fully
engaging the pump.
PAGE A - 2 SAFETY
Page 8
80 SERIES OM-00830
INSTALLATION - SECTION B
Review all SAFETY 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
OUTLINE DRAWING
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 (see Sec
tion E, Page 1).
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.
Figure 1. Pump Model 82H20-B
PAGE B - 1INSTALLATION
Page 9
OM-00830 80 SERIES
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.
c. Carefully read all tags, decals, and markings
on the pump assembly, and perform all duties
indicated.
POSITIONING PUMP
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam
age to equipment. Suction and dis
charge hoses and piping must be re
moved from the pump before 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.
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. Refer to Rotation in OPERATION,
Section C.
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 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.
The pump assembly can be seriously
damaged if the cables or chains 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 or to eliminate vibra
tion.
SUCTION AND DISCHARGE PIPING
Pump performance is adversely effected by in
creased suction lift, discharge elevation, and fric
tion losses. See the performance curve on Page
E‐1 to be sure your overall application allows pump
to operate within the safe operation range.
PAGE B - 2 INSTALLATION
Page 10
80 SERIES OM-00830
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
to secure them when filled with liquid and under
pressure.
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
If a strainer is furnished with the pump, be certain
to use it; any spherical solids which pass through a
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 3/4 inch
(19,1 mm) diameter spherical solids.
Gauges
Most pumps are drilled and tapped for installing
discharge pressure and vacuum suction gauges.
If these gauges are desired for pumps that are not
tapped, drill and tap the suction and discharge
lines not less than 18 inches (457,2 mm) from the
suction and discharge ports and install the lines.
Installation closer to the pump may result in erratic
readings.
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
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.
PAGE B - 3INSTALLATION
Page 11
OM-00830 80 SERIES
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.
recommended minimum submergence vs. veloc
ity.
Figure 2 shows
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).
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
PAGE B - 4 INSTALLATION
phoning action causing damage to the pump
could result.
Valves
If a throttling valve is desired in the discharge line,
use a valve as large as the largest pipe to minimize
Page 12
80 SERIES OM-00830
friction losses. Never install a throttling valve in a
suction line.
With high discharge heads, it is recommended that
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.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
Bypass Lines
If a system check valve is used due to high dis
charge head, it may be necessary to vent trapped
air from the top of the pump during the priming
process. This may be accomplished by installing a
bypass line from the top of the pump, back to the
source of liquid. The end of the bypass line must be
submerged. The line must be large enough to pre
vent clogging, but not so large as to affect pump
discharge capacity.
ALIGNMENT
must be checked and realigned before operation.
Before checking alignment, tighten the foundation
bolts. The pump casing feet and/or pedestal feet,
and the driver mounting bolts should also be tightly
secured.
When checking alignment, disconnect
the power source to ensure that the
pump will remain inoperative.
Adjusting the alignment in one direction
may alter the alignment in another direc
tion. Check each procedure after altering
alignment.
Coupled Drives
When using couplings, the axis of the power
source must be aligned to the axis of the pump
shaft in both the horizontal and vertical planes.
Most couplings require a specific gap or clearance
between the driving and the driven shafts. Refer to
the coupling manufacturer's service literature.
The alignment of the pump and its power source is
critical for trouble‐free mechanical operation. In
either a flexible coupling or V‐belt driven system,
the driver and pump must be mounted so that their
shafts are aligned with and parallel to each other. It
is imperative that alignment be checked after the
pump and piping are installed, and before opera
tion.
NOTE
Check Rotation, Section C, before final alignment
of the pump.
When mounted at the Gorman‐Rupp factory, driver
and pump are aligned before shipment. Misalign
ment will occur in transit and handling. Pumps
Align spider insert type couplings by using calipers
to measure the dimensions on the circumference
of the outer ends of the coupling hub every 90_.
The coupling is in alignment when the hub ends
are the same distance apart at all points (see Fig
ure 3A).
Figure 3A. Aligning Spider Type Couplings
PAGE B - 5INSTALLATION
Page 13
OM-00830 80 SERIES
Figure 3B. Aligning Non‐Spider Type Couplings
Align non‐spider type couplings by using a feeler
gauge or taper gauge between the coupling halves
every 90_. The coupling is in alignment when the
hubs are the same distance apart at all points (see
Figure 3B).
Check parallel adjustment by laying a straightedge
across both coupling rims at the top, bottom, and
side. When the straightedge rests evenly on both
halves of the coupling, the coupling is in horizontal
parallel alignment. If the coupling is misaligned,
use a feeler gauge between the coupling and the
straightedge to measure the amount of misalign
ment.
V‐Belt Drives
When using V‐belt drives, the power source and
the pump must be parallel. Use a straightedge
along the sides of the pulleys to ensure that the pul
leys are properly aligned (see Figure 3C). In drive
systems using two or more belts, make certain that
the belts are a matched set; unmatched sets will
cause accelerated belt wear.
MISALIGNED:
SHAFTS
NOT PARALLEL
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
Figure 3C. Alignment of V‐Belt Driven Pumps
Tighten the belts in accordance with the belt manu
facturer's instructions. If the belts are too loose,
they will slip; if the belts are too tight, there will be
excessive power loss and possible bearing failure.
Select pulleys that will match the proper speed ra
tio; overspeeding the pump may damage both
pump and power source.
Do not operate the pump without the
shields and/or guards in place over the
drive shaft, belts, and/or couplings, or
other rotating parts. Exposed rotating
parts can catch clothing, fingers, or
tools, causing severe injury to person
nel.
PAGE B - 6 INSTALLATION
Page 14
80 SERIES
OM-00830
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 most
non‐volatile, non‐flammable liquids
containing specified entrained solids.
Do not attempt to pump volatile or flam
mable liquids which may damage the
pump or endanger personnel as a result
of pump failure.
Pump speed and operating condition
points must be within the continuous per
formance range shown on the curve (See
Section E, Page 1).
Add liquid to the pump casing when:
1. The pump is being put into service for the
first time.
2. The pump has not been used for a consider
able length of time.
3. The liquid in the pump casing has evapo
rated.
Once the pump casing has been filled, the pump
will prime and reprime as necessary.
After filling the pump casing, reinstall
and tighten the fill plug. Do not attempt
to operate the pump unless all connect
ing piping is securely installed. Other
wise, liquid in the pump forced out un
der pressure could cause injury to per
sonnel.
To fill the pump, remove the pump casing fill cover
or fill plug in the top of the casing, and add clean
liquid until the casing is filled. Replace the fill cover
or fill plug before operating the pump.
PRIMING
STARTING
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).
This pump is self‐priming, but the pump should
never be operated unless there is liquid in the
pump casing.
Consult the operations manual furnished with the
power source.
Rotation
The correct direction of pump rotation is counter
clockwise when facing the impeller. If the pump is
operated in the wrong direction, the impeller could
become loosened from the shaft and seriously
damage the pump.
Never operate this pump unless there is
liquid in the pump casing. The pump will
not prime when dry. Extended operation of
a dry pump will destroy the seal assembly.
OPERATION PAGE C - 1
Only operate this pump in the direction in
dicated by the arrow on the pump body
and on the accompanying decal. Other
Page 15
OM-00830 80 SERIES
wise, the impeller could become loosened
from the shaft and seriously damage the
pump.
Consult the operating manual furnished with the
power source before attempting to start the power
source.
If an electric motor is used to drive the pump, re
move V‐belts, couplings, or otherwise disconnect
the pump from the motor before checking motor
rotation. Operate the motor independently while
observing the direction of the motor shaft, or cool
ing fan.
If rotation is incorrect on a three‐phase motor, have
a qualified electrician interchange any two of the
three phase wires to change direction. If rotation is
incorrect on a single‐phase motor, consult the lit
erature supplied with the motor for specific instruc
tions.
OPERATION
Lines With a Bypass
sure which could damage pipe ends, gaskets,
sprinkler heads, and any other fixtures connected
to the line. When the discharge line is completely
filled, adjust the throttling valve to the required flow
rate.
Leakage
No leakage should be visible at pump mating sur
faces, or at pump connections or fittings. Keep all
line connections and fittings tight to maintain maxi
mum pump efficiency.
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160_F (71_C). 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 and allow it to cool before servicing it. Refill
the pump casing with cool liquid.
Close the discharge throttling valve (if so
equipped) so that the pump will not have to prime
against the weight of the liquid in the discharge
line. Air from the suction line will be discharged
through the bypass line back to the wet well during
the priming cycle. When the pump is fully primed
and liquid is flowing steadily from the bypass line,
open the discharge throttling valve. Liquid will then
continue to circulate through the bypass line while
the pump is in operation.
Lines Without a Bypass
Open all valves in the discharge line and start the
engine. Priming is indicated by a positive reading
on the discharge pressure gauge or by a quieter
operation. The pump may not prime immediately
because the suction line must first fill with liquid. If
the pump fails to prime within five minutes, stop it
and check the suction line for leaks.
After the pump has been primed, partially close the
discharge line throttling valve in order to fill the line
slowly and guard against excessive shock pres
Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over
heated pump. Vapor pressure within the
pump can cause parts being disen
gaged to be ejected with great force. Al
low the pump to completely cool before
servicing.
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
should also be checked if pump flow rate begins to
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
OPERATIONPAGE C - 2
Page 16
80 SERIES
OM-00830
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 (see Section E,
Page 1).
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge
in the system, using pipe dope on the threads.
Block the suction line and start the pump. At oper
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.
Open the suction line, and read the vacuum gauge
with the pump primed and at operation speed.
Shut off the pump. The vacuum gauge reading will
immediately drop proportionate to static suction
lift, and should then stabilize. 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 installation of the vacuum gauge.
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.
BEARING TEMPERATURE CHECK
Bearings normally run at higher than ambient tem
peratures because of heat generated by friction.
Temperatures up to 160_F (71_C) are considered
normal for bearings, and they can operate safely to
at least 180_F (82_C).
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.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, lock out or disconnect
the power source to ensure that the pump will re
main inoperative.
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 Section E). Bear
ing 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.
OPERATION PAGE C - 3
Page 17
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Lock out or disconnect the power
source to ensure that the pump will
remain inoperative.
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.
OM-0083080 SERIES
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS TO
PRIME
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
Not enough liquid in casing. Add liquid to casing. See
PRIMING.
Suction check valve contaminated or
damaged.
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 check valve or foot valve
clogged or binding.
Suction lift or discharge head too high. Check piping installation and install
Strainer clogged. Check strainer and clean if neces
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.
Clean valve.
bypass line if needed. See INSTAL
LATION.
sary.
leaking or worn seal or gasket.
TROUBLESHOOTING PAGE D - 1
Page 18
OM-00830 80 SERIES
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
PUMP CLOGS
FREQUENTLY
Suction intake not submerged at
proper level or sump too small.
Impeller or other wearing parts worn
or damaged.
Strainer clogged.
Impeller clogged.
Suction lift or discharge head too high.
Pump speed too slow. Check driver output; check belts or
Pump speed too high. Check driver output; check that
Discharge head too low.
Discharge flow too slow.
Suction check valve or foot valve
clogged or binding.
Check installation and correct
submergence as needed.
Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.
Check strainer and clean if neces
sary.
Free impeller of debris.
Check piping installation and install
bypass line if needed. See INSTAL
LATION.
couplings for slippage.
sheaves or couplings are correctly
sized.
Adjust discharge valve.
Dilute if possible.Liquid solution too thick.
Open discharge valve fully to in
crease flow rate, and run engine at
maximum governed speed.
Clean valve.
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.
Locate and eliminate source of air
bubble.
Secure mounting hardware.Pump or drive not securely mounted.
parts.
Check piping installation for
proper support.
Check bearing temperature regu
larly to monitor any increase.
bricant.
Align drive properly.
Reduce speed of power source.
Disassemble pump and check
bearing(s).
BEARINGS RUN
TOO HOT
Pumping entrained air.
Impeller clogged or damaged. Clean out debris; replace damaged
Suction and discharge lines not prop
erly supported.
Bearing temperature is high, but within
limits.
Low or incorrect lubricant. Check for proper type and level of lu
Drive misaligned.
Pump speed too high.
Bearing(s) frozen.
TROUBLESHOOTINGPAGE D - 2
Page 19
OM-0083080 SERIES
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
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.
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.
TROUBLESHOOTING PAGE D - 3
Page 20
80 SERIES
OM-00830
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 82H20-B
Based on 70_F (21_C) clear water at sea level
with minimum suction lift. Since pump installations
are seldom identical, your performance may be dif
ference 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 21
PARTS PAGE
80 SERIESOM-00830
SECTION DRAWING
Figure 1. Pump Model 82H20-B
MAINTENANCE & REPAIRPAGE E - 2
Page 22
80 SERIES
OM-00830
PARTS LIST
Pump Model 82H20-B
(From S/N 737048 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
PART NAME PART
NO.
NUMBER
MAT'L
CODE
QTY ITEM
NO.
PART NAME PART
NUMBER
MAT'L
CODE
QTY
1 PUMP CASING 8149 10010 1
2 IMPELLER 7947B 10010 1
3 SEAL ASSY 46512-034 --- 1
4 BOTTLE OILER 46711-505 --- 1
5 PIPE COUPLING AE04 15079 1
6 PIPE NIPPLE T0406 15079 1
7 OIL SEAL S2102 --- 1
8 SPRING SEAT 3929A 17000 1
9 IMPELLER SHIM SET 2X 17090 REF
10 SHAFT SLEEVE 3447 16000 1
11 PIPE PLUG P04 15079 1
12 SLINGER RING 3272 19120 1
13 BALL BEARING 23275-008 --- 1
14 VENTED PLUG S1703 --- 1
15 PEDESTAL 3114B 10010 1
16 ROTATION DECAL 2613M --- 1
17 BALL BEARING 23275-008 --- 1
18 O‐RING 25152-235 --- 1
19 RETAINING RING S247 --- 1
20 SHAFT KEY N0407 15990 1
21 IMPELLER SHAFT 38514-549 15010 1
22 ALLEN HD SETSCREW GA#10-01S 15990 2
23 BEARING RETAINER 38322-521 26000 1
24 OIL SEAL 25227-303 --- 1
25 BRG ADJ SHIM SET 48261-009 15990 1
26 SIGHT GAGE 26714-011 --- 1
27 PIPE PLUG P06 15079 1
28 PIPE PLUG P06 15079 1
29 OIL SEAL 25227-311 --- 1
30 STUD C0607 15991 8
31 HEX NUT D06 15991 8
32 SEAL PLATE ASSY 38272-341 10010 1
33 GASKET SET 3G 18000 1
34 WEAR PLATE ASSY 2634B 15990 1
INDICATES PARTS RECOMMENDED FOR STOCK
35 WASHER 3118 15990 1
36 T TYPE LOCKWASHER AK06 15991 1
37 HEX HD CAPSCREW B0603 15991 1
38 HEX NUT D06 15991 1
39 LOCK WASHER J06 15991 1
40 PIPE PLUG P16 10009 1
41 HEX HD CAP SCREW B0616 15991 1
42 FIBER WASHER KF06 18040 1
43 STUD C0606 15991 4
44 HEX NUT D06 15991 4
45 SUCTION FLANGE 1361 10010 1
46 CHECK VALVE ASSY 1361A --- 1
47 -VALVE GASKET 1361G 19070 1
48 -LGE VALVE WT 19B 10010 1
49 -SML VALVE WT 1354 15160 1
50 -RD HD MACH SCR X0403 17090 1
51 -LOCK WASHER J04 17090 1
52 FILL PLUG ASSY 48271-062 --- 1
53 NAME PLATE 38818-019 13990 1
54 DRIVE SCREW BM#04-03 17000 4
NOT SHOWN:
G‐R DECAL GR-03 --- 1
LUBE DECAL 38816-079 --- 1
INSTRUCTION TAG 38817-011 --- 1
INSTRUCTION TAG 38817-028 --- 1
SUCTION STICKER 6588AG --- 1
PRIMMING STICKER 6588AH --- 1
DISCH STICKER 6588BJ --- 1
OPTIONAL:
STRAINER 2362 24001 1
2” STRAINER 26841-025 --- 1
STREET ELBOW RS32 11999 1
CSG HTR ASSY 120V 47811-046 --- 1
CSG HTR ASSY 240V 47811-047 --- 1
MAINTENANCE & REPAIR PAGE E - 3
Page 23
OM-00830 80 SERIES
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY
Review all SAFETY information 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 view (see Figure 1) and the accompa
nying parts lists.
This manual will alert personnel to known proce
dures which require special attention, to those
which could damage equipment, and to those
which could be dangerous to personnel. However,
this manual cannot possibly anticipate and provide
detailed precautions for every situation that might
occur during maintenance of the unit. Therefore, it
is the responsibility of the owner/maintenance per
sonnel to ensure that only safe, established main
tenance procedures are used, and that any proce
dures not addressed in this manual are performed
only after establishing that neither personal safety
nor pump integrity are compromised by such prac
tices.
Before attempting to service the pump, lock out or
disconnect the power source to ensure that it will
remain inoperative. Close all valves in the suction
and discharge lines.
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.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam
age to equipment. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting.
Suction Check Valve Disassembly
Before attempting to service the pump, remove the
pump casing drain plug (40) and drain the pump.
Clean and reinstall the drain plug.
To service the suction check valve, remove the suc
tion piping. Remove the nuts (44) securing the suc
tion flange (45) and the check valve assembly (46)
to the pump casing (1). Pull the check valve assem
bly from the suction port.
Inspect the check valve parts for wear or damage.
If replacement is required, remove the hardware
(50 and 51) and separate the valve gasket (47) and
weights (48 and 49).
For power source disassembly and repair, consult
the literature supplied with the power source, or
contact your local power source representative.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man
ual.
2. Lock out or disconnect the power
source to ensure that the pump will
remain inoperative.
3. Allow the pump to completely cool
if overheated.
If no further disassembly is required, see Suction
Check Valve Installation.
Pump Casing Removal
To service the impeller (2), wear plate assembly
(34) and seal assembly (3), disconnect the dis
charge piping. Remove the hardware securing the
pump casing (1) to the base.
Remove the nuts (31) securing the pump casing
and gasket set (33) to the pedestal (15) and seal
plate (32). Install a standard 5/8-11 UNC lifting
eye in the tapped hole in the top of the pump cas
ing. Be sure to screw the eye into the casing until
fully engaged. Use a hoist and sling of suitable ca
pacity to separate the casing from the seal plate
and pedestal.
MAINTENANCE & REPAIRPAGE E - 4
Page 24
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed
to facilitate removal or installation of in
dividual components only. Additional
weight may result in damage to the
pump or failure of the eye bolt.
Remove the gasket set (33) from the pedestal and
seal plate. Tie and tag the gaskets, or measure and
record their thickness for ease of reassembly. Tie
and tag any leveling shims used under the casing
mounting feet to ease reassembly.
Counterclockwise
Lathe Dog Arm
Heavy
Bar Stock
OM-0083080 SERIES
Turn
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Inspect the wear plate assembly (34) and replace it
if badly scored or worn. To remove the wear plate
assembly, remove the capscrew (41) and fiber
washer (42) just below the suction port. Reach
through the suction port and disengage the hard
ware (38 and 39) from the wear plate. Tap the wear
plate assembly free of the casing.
Impeller Removal
Before attempting to remove the impeller, remove
the bottle oiler (4) and piping (5 and 6) from the seal
plate. Remove the drain plug (11) and drain the
seal cavity. Clean and reinstall the drain plug.
Immobilize the impeller by wedging a block wood
between the vanes. Remove the hardware (35, 36
and 37) securing the impeller to the shaft. If re
moved, install the shaft key (20). Install a lathe dog
on the drive end of the shaft (21) with the “V” notch
positioned over the shaft keyway.
With the impeller rotation still blocked, strike the
lathe dog sharply in a counterclockwise direction
(when facing the drive end of the shaft). The impel
ler may also be loosened by using a long piece of
heavy bar stock to pry against the arm of the lathe
dog in a counterclockwise direction (when facing
the drive end of the shaft) as shown in Figure 2.
Use caution not to damage the shaft or keyway.
When the impeller breaks loose, remove the lathe
dog and wood block and unscrew the impeller
from the shaft.
Figure 2. Loosening Impeller
Unscrew the impeller from the shaft. Use caution
when removing the impeller; tension on the seal
spring will be released as the impeller is un
screwed.
Inspect the impeller and replace it if cracked or
badly worn. Slide the impeller adjusting shims (9)
off the impeller shaft. Tie and tag the shims, or
measure and record their thickness for ease of
reassembly.
Seal Removal and Disassembly
(Figures 1 or 3)
Remove the spring centering washer (8) and seal
spring.
Carefully slide the shaft sleeve (10) and rotating
portion of the seal off the shaft (21) as a unit. Apply
oil to the sleeve and work it under the rubber bel
lows. Slide the rotating portion of the seal off the
sleeve.
Carefully slide the seal plate (32) and stationary
portion of the seal off the shaft as a unit.
Position the seal plate on a flat surface with the im
peller side down. Pry the oil seal (7) out of the seal
plate. Use a suitably sized dowel to press the sta
tionary seat and O‐ring out of the seal plate from
the back side.
If no further disassembly is required, see Seal
Reassembly and Installation.
MAINTENANCE & REPAIR PAGE E - 5
Page 25
OM-00830 80 SERIES
Shaft And Bearing Removal And Disassembly
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.
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.
Clean the pedestal, shaft and all component parts
Shaft and bearing disassembly in the field
is not recommended. these operations
should be performed only in a properly‐
(except the bearings) with a soft cloth soaked in
cleaning solvent. Inspect the parts for wear or dam
age and replace as necessary.
equipped shop by qualified personnel.
Remove the pedestal drain plug (28) and drain the
pedestal. Clean and reinstall the plug.
Remove the slinger ring (12) from the shaft. Re
move the pedestal mounting hardware from the
base. Tie and tag any shims used under the
mounting feet for leveling.
Use snap ring pliers to remove the bearing retain
ing ring (19) from the pedestal bore. Remove the
bearing shim set (25); tie and tag the shims, or
measure and record their thickness for ease of
reassembly.
Remove the setscrews (22) from the bearing re
tainer (23) and install two machine screws
(#10-32 X 1-inch long, not supplied). Pry the re
tainer from the pedestal bore using a pair of screw
drivers against the heads of the machine screws.
Do not use the machine screws to jack against the
ball bearing. Remove the machine screws and re
install the setscrews.
Press the oil seal (24) from the bearing retainer,
and remove the O‐ring (18) from the pedestal bore.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear
ings (13 and 17) out of the pedestal.
Press the oil seal (29) from the pedestal bore.
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.
Inspect the shaft for distortion, nicks or scratches,
or thread damage on the impeller end. Dress small
nicks and burrs with a fine file or emery cloth. Re
place the shaft if defective.
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 and inspect the bearing balls. If ro
tation is rough or the bearing balls are discolored,
replace the bearings.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the pedestal.
MAINTENANCE & REPAIRPAGE E - 6
Page 26
OM-0083080 SERIES
Replace the bearings, shaft, or pedestal if the
proper bearing fit is not achieved.
If bearing replacement is required, use a bearing
puller to remove the inboard and outboard bear
ings from the impeller shaft.
Shaft And Bearing Reassembly And Installation
Clean and inspect the bearings as indicated in
Shaft and Bearing Removal and Disassembly.
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 and
bearings 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.
curred, use a suitably 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.
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.
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing is fully seated
against the bore shoulder.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Position the oil seal (29) in the pedestal bore with
the lip positioned as shown in Figure 1. Press the
oil seal into the bore until fully seated.
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 250_F (120_C), 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 bear
ings to prevent burns.
After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
out of position in shrinking. If movement has oc
Position the oil seal (24) in the bearing retainer (23)
with the lip positioned as shown in Figure 1. Press
the oil seal into the retainer until fully seated.
Replace the bearing retainer O‐ring (18) in the ped
estal, and lubricate it with grease. Press the bear
ing retainer into the pedestal until it seats against
the bearing. Be careful not to cut the oil seal lip on
the shaft keyway. Be sure the setscrews (22) in the
bearing retainer are positioned horizontally inline.
Install the same thickness of bearing adjusting
shims (25) as previously removed. Reinstall the re
taining ring (19) and check shaft endplay.
NOTE
Shaft endplay should be .002 to .005 inch (0,05 to
0,12 mm). Add or remove bearing adjusting shims
to obtain this endplay.
Install the slinger ring (12) and shaft key (20). Install
any leveling shims used under the pedestal feet.
MAINTENANCE & REPAIR PAGE E - 7
Page 27
OM-00830 80 SERIES
Seal Reassembly and Installation
(Figures 1 and 3)
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
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.
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.
ROTATING ELEMENT
DRIVE BAND
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.
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.
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 O‐
rings and shaft sleeve (10) with water or a very
small amount of oil, and apply a drop of light lubri
cating oil on the finished faces. Assemble the seal
as follows, (see Figure 3).
STATIONARY ELEMENT
IMPELLER
ADJUSTING
SHIMS
BELLOWS
IMPELLER
SPRING
CENTERING
WASHER
SPRING
O‐RINGS
IMPELLER
SHAFT
SHAFT
SLEEVE
STATIONARY SEAT
RETAINER
Figure 3. 46512-034 Seal Assembly
MAINTENANCE & REPAIRPAGE E - 8
Page 28
This seal is not designed for operation at
temperatures above 160_F (71_C). Do not
use at higher operating temperatures.
Position the seal plate (32) on a flat surface with the
impeller side down. Position the lip seal (7) in the
seal plate bore with the lip position as shown in Fig
ure 1. Press the lip seal into the seal plate bore until
fully seated.
Position the seal plate on a flat surface with the im
peller side facing up. Lubricate the stationary seat
O‐ring with water or light oil, and press the station
ary subassembly into the seal plate until fully
seated. After installation, wipe the face of the sta
tionary element lightly in a concentric pattern with a
clean, lint‐free tissue.
Slide the assembled seal plate and stationary seat
over the impeller shaft (20) and temporarily secure
the seal plate to the pedestal (12) using two cap
screws and nuts (1/2 UNC X 1 1/2 inch long, not
supplied).
Lubricate the O.D. of the shaft sleeve with water or
a very small amount of oil, and slide the rotating
portion of the seal assembly (consisting of the ro
tating element, bellows and retainer) onto the shaft
sleeve until the face of the rotating element is just
flush with the chamfered end of the sleeve.
Slide the assembled seal and sleeve onto the shaft
until the seal faces contact. Continue to press the
shaft sleeve through the rotating portion of the seal
until it is fully seated against the shaft shoulder. Use
caution not to roll or damage the lip of the seal (7).
Install the seal spring and spring centering washer
(8).
OM-0083080 SERIES
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
between the impeller and the seal plate is neces
sary for maximum pump efficiency. Measure this
clearance and add or remove impeller shims until
this clearance is reached.
NOTE
Be sure the seal plate is tight against the pedestal
while measuring this clearance.
After the back clearance is set, secure the impeller
with the hardware (35, 36 and 37). Reinstall the
bottle oiler and piping (4, 5 and 6).
Pump Casing Installation
If the wear plate assembly (34) was removed, posi
tion the replacement wear plate assembly squarely
against the casing shoulder and secure it with the
mounting hardware (38, 39, 41 and 42). Replace
the fiber washer (42) if badly worn or compressed.
Remove the hardware temporarily securing the
seal plate to the pedestal. Install the same thick
ness of pump casing gaskets (33) as previously re
moved. Secure the pump casing (1) to the seal
plate and pedestal with the nuts (31). Do not fully
tighten the nuts at this time.
A clearance of .008 to .015 inch (0,20 to 0,38 mm)
between the impeller and the wear plate is also rec
ommended for maximum pump efficiency. Set this
clearance by adding or removing gaskets in the
pump casing gasket set (33) until the impeller
scrapes against the wear plate when the shaft is
turned by hand. After the impeller scrapes, add ap
proximately .008 inch (0,20 mm) of gaskets.
Secure the pump casing to the base with the pre
viously removed hardware. Be sure to reinstall any
leveling shims used under the mounting feet of the
pump casing.
Lubricate the seal as indicated in LUBRICATION
at the end of this section.
Impeller Installation and Adjustment
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (9) as previously removed, and screw the
impeller onto the shaft until tight.
MAINTENANCE & REPAIR PAGE E - 9
If a lifting eye was used to move the pump casing,
be sure to remove the lifting eye from the pump
casing.
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed
Page 29
OM-00830 80 SERIES
to facilitate removal or installation of in
dividual components only. Additional
weight may result in damage to the
pump or failure of the eye bolt.
Suction Check Valve Installation
Inspect components of the check valve assembly
(46) and replace as required. If separated at disas
sembly, assemble the check valve weights (48 and
49) to the check valve gasket (47) with the hard
ware (51 and 52).
Position the check valve assembly in the suction
port with the large weight (48) facing toward the in
side of the pump casing. Install the suction flange
(45) and secure with the nuts (44). Check the oper
ation of the check valve to ensure proper seating
and free movement.
Final Pump Assembly
LUBRICATION
Seal Assembly
(Figures 1 and 4)
Fill the bottle oiler (4) approximately 2/3 full with
SAE No. 30 non‐detergent oil. Check the oil level
regularly and keep the bottle oiler full.
Bearings
The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauge (26) and maintain it at the
middle of the gauge. When lubrication is required,
add SAE No. 30 non‐detergent oil through the hole
for the air vent (14). Do not over‐lubricate. Over‐lu
brication can cause the bearings to over‐heat, re
sulting in premature bearing failure.
NOTE
The white reflector in the sight gauge must be posi
tioned horizontally to provide proper drainage.
Be sure the pump and power source are securely
mounted to the base. Reconnect the power source
to the pump.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
If a lifting eye was used to move the pump casing,
be sure to remove the lifting eye from the pump
casing.
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.
Fill the pump casing with clean liquid. Reinstall the
fill plug (52) and tighten it.
Under normal conditions, drain the pedestal once
each year and refill with approximately 5 ounces
(0,2 liters) of clean oil. Change the oil more fre
quently if the pump is operated continuously or in
stalled in an environment with rapid temperature
change.
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.
Power Source
Refer to OPERATION, Section C, before putting
the pump back into service.
Consult the literature supplied with the power
source, or contact your local power source repre
sentative.
MAINTENANCE & REPAIRPAGE E - 10
Page 30
For U.S. and International Warranty Information,
Please Visit www.grpumps.com/warranty
or call:
U.S.: 419-755-1280
International: +1-419-755-1352
For Canadian Warranty Information,
Please Visit www.grcanada.com/warranty
or call:
519-631-2870
THE GORMAN‐RUPP COMPANY D MANSFIELD, OHIO
GORMAN‐RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA
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