Page 1
ACDE OM‐00558‐01
June 11, 1979
Rev. D 10‐17‐2013
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
10 SERIES PUMP
MODEL
11 1/2A2‐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.
e1979 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.............................................................
Clearance PAGE B - 2.............................................................
SUCTION AND DISCHARGE PIPING PAGE B - 3.........................................
Materials PAGE B - 3..............................................................
Line Configuration PAGE B - 3......................................................
Connections to Pump PAGE B - 3..................................................
Gauges PAGE B - 3...............................................................
SUCTION LINES PAGE B - 3...........................................................
Fittings PAGE B - 3...............................................................
Strainers PAGE B - 3..............................................................
Sealing PAGE B - 3...............................................................
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................................................................
Bypass Lines PAGE B - 5..........................................................
AUTOMATIC AIR RELEASE VALVE PAGE B - 6...........................................
Air Release Valve Installation PAGE B - 6............................................
ALIGNMENT PAGE B - 7..............................................................
Coupled Drives PAGE B - 8........................................................
V‐Belt Drives PAGE B - 8...........................................................
V‐BELT TENSIONING PAGE B - 9......................................................
General Rules of Tensioning PAGE B - 9.............................................
Tension Measurement PAGE B - 9..................................................
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 - 3..................................................
STOPPING PAGE C - 3................................................................
BEARING TEMPERATURE CHECK PAGE C - 3..........................................
Cold Weather Preservation PAGE C - 3..............................................
i
Page 4
TABLE OF CONTENTS
(continued)
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 LIST:
Pump Model PAGE E - 3..........................................................
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E - 4.........................
Suction Check Valve Removal and Disassembly PAGE E - 4...........................
Back Cover Removal PAGE E - 4...................................................
Pump Casing Removal PAGE E - 5.................................................
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 - 10......................................
Pump Casing Installation PAGE E - 10................................................
Back Cover Installation PAGE E - 10.................................................
Suction Check Valve Installation PAGE E - 10.........................................
Final Pump Assembly PAGE E - 10..................................................
LUBRICATION PAGE E - 11.............................................................
Seal Assembly PAGE E - 11.........................................................
Bearings PAGE E - 11..............................................................
Power Source PAGE E - 11.........................................................
ii
Page 5
10 SERIES
OM-00558
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 a 10 Series, semi‐open impeller, self‐
priming centrifugal model with a suction check
valve. The pump is designed for handling most
non‐volatile, non‐flammable liquids containing
specified entrained solids. The basic material of
construction for wetted parts is gray iron.
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
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
10 SERIES
OM-00558
SAFETY ‐ SECTION A
This information applies to 10 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.
This manual will alert personnel to
known procedures which require spe
cial attention, to those which could
damage equipment, and to those which
could be dangerous to personnel. How
ever, this manual cannot possibly antici
pate and provide detailed instructions
and precautions for every situation that
might occur during maintenance of the
unit. Therefore, it is the responsibility of
the owner/maintenance personnel to
ensure that only safe, established main
tenance procedures are used, and that
any procedures not addressed in this
manual are performed only after estab
lishing that neither personal safety nor
pump integrity are compromised by
such practices.
Before attempting to 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.
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
non‐volatile, non‐flammable liquids
containing specified entrained solids.
Do not attempt to pump liquids for
which the pump has not been approved,
or which may damage the pump or en
danger personnel as a result of pump
failure.
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are tight, properly
supported and secure before operation.
PAGE A - 1SAFETY
Page 7
10 SERIESOM-00558
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.
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.
Never run this pump backwards. Be cer
tain that rotation is correct before fully
engaging the pump.
Pumps and related equipment must be in
stalled and operated according to all na
tional, local and industry standards.
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.
PAGE A - 2 SAFETY
Page 8
10 SERIES OM-00558
INSTALLATION - SECTION B
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this
section offers only general recommendations and
practices required to inspect, position, and ar
range the pump and piping.
Most of the information pertains to a standard
static lift application where the pump is positioned
above the free level of liquid to be pumped.
If installed in a flooded suction application where
the liquid is supplied to the pump under pressure,
some of the information such as mounting, line
OUTLINE DRAWING
configuration, and priming must be tailored to the
specific application. This pump is equipped with a
Gorman‐Rupp double grease lubricated seal,
therefore the maximum incoming pressure must
be limited to 10 p.s.i.
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 11 1/2A2-B
PAGE B - 1INSTALLATION
Page 9
OM-00558 10 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
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
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.
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.
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.
Clearance
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.
PAGE B - 2 INSTALLATION
It is recommended that 18 inches (457 mm) of
clearance be provided in front of the back cover to
permit removal of the cover and easy access to the
pump interior. A minimum clearance of 6 inches
(152,4 mm) must be maintained to permit removal
of the cover.
Page 10
10 SERIES OM-00558
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.
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
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
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.
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.
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.
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 1 inch (25,4
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.
PAGE B - 3INSTALLATION
Page 11
OM-00558 10 SERIES
Suction Lines In Sumps
If a single suction line is installed in a sump, it
should be positioned away from the wall of the
sump at a distance equal to 1‐1/2 times the diame
ter of the suction line.
If there is a liquid flow from an open pipe into the
sump, the flow should be kept away from the suc
tion inlet because the inflow will carry air down into
the sump, and air entering the suction line will re
duce pump efficiency.
If it is necessary to position inflow close to the suc
tion inlet, install a baffle between the inflow and the
suction inlet at a distance 1‐1/2 times the diameter
of the suction pipe. The baffle will allow entrained
air to escape from the liquid before it is drawn into
the suction inlet.
If two suction lines are installed in a single sump,
the flow paths may interact, reducing the efficiency
of one or both pumps. To avoid this, position the
suction inlets so that they are separated by a dis
tance equal to at least 3 times the diameter of the
suction pipe.
Suction Line Positioning
The depth of submergence of the suction line is
critical to efficient pump operation.
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
PAGE B - 4 INSTALLATION
Page 12
10 SERIES OM-00558
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,
use a valve as large as the largest pipe to minimize
friction losses. Never install a throttling valve in a
suction line.
With high discharge heads, it is recommended that
a throttling valve 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.
In low discharge head applications (less than 30
feet (9,1 m)), it is recommended that the bypass
line be run back to the wet well, and located 6
inches below the water level or cut‐off point of the
low level pump. In some installations, this bypass
outline may be terminated with a six‐to‐eight foot
(1,8 to 2,4 m) length of 1‐1/4 inch (31,8 mm) I.D.
smooth‐bore hose; air and liquid vented during
the priming process will then agitate the hose and
break up any solids, grease, or other substances
likely to cause clogging.
A bypass line that is returned to a wet well
must be secured against being drawn into
the pump suction inlet.
It is also recommended that pipe unions be in
stalled at each 90_ elbow in a bypass line to ease
disassembly and maintenance.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
Bypass Lines
Self‐priming pumps are not air compressors. Dur
ing the priming cycle, air from the suction line must
be vented to atmosphere on the discharge side. If
the discharge line is open, this air will be vented
through the discharge. However, if a check valve
has been installed in the discharge line, the dis
charge side of the pump must be opened to atmos
pheric pressure through a bypass line installed be
tween the pump discharge and the check valve. A
self‐priming centrifugal pump will not prime if
there is sufficient static liquid head to hold the dis
charge check valve closed.
NOTE
The bypass line should be sized so that it does not
affect pump discharge capacity; however, the by
pass line should be at least 1 inch (25,4 mm) in di
ameter to minimize the chance of plugging.
In high discharge head applications (more than
30 feet (9,1 m), an excessive amount of liquid may
be bypassed and forced back to the wet well under
the full working pressure of the pump; this will re
duce overall pumping efficiency. Therefore, it is
recommended that a Gorman‐Rupp Automatic
Air Release Valve be installed in the bypass line.
Gorman‐Rupp Automatic Air Release Valves are
reliable, and require minimum maintenance. See
Automatic Air Release Valves in this section for
installation and theory of operation of the Auto
matic Air Release Valve. Consult your Gorman‐
Rupp distributor, or contact the Gorman‐Rupp
Company for selection of an Automatic Air Release
Valve to fit your application.
Except in certain specific applications (to
prevent flooding during service of an auto
matic air release valve in a below‐ground
lift station), if a manual shut‐off valve is in
stalled anywhere in a bypass line, it must
be a full‐opening, ball‐type valve to pre
vent plugging by solids.
PAGE B - 5INSTALLATION
Page 13
OM-00558 10 SERIES
AUTOMATIC AIR RELEASE VALVE
When properly installed, a Gorman‐Rupp Auto
A manual shut‐off valve should not be
installed in any bypass line. A manual
shut‐off valve may inadvertently be left
matic Air Release Valve will permit air to escape
through the bypass line and then close automati
cally when the pump is fully primed and pumping
at full capacity.
closed during operation. A pump which
has lost prime may continue to operate
without reaching prime, causing dan
gerous overheating and possible explo
sive rupture of the pump casing. Per
sonnel could be severely injured.
Allow an over‐heated pump to com
pletely cool before servicing. Do not re
move plates, covers, gauges, or fittings
from an over‐heated pump. Liquid with
in the pump can reach boiling tempera
Some leakage (1 to 5 gallons [3.8 to 19
liters] per minute) will occur when the
valve is fully closed. Be sure the bypass
line is directed back to the wet well or
tank to prevent hazardous spills.
Consult the manual accompanying the Air Release
Valve for additional information on valve installation
and performance.
tures, and vapor pressure within the
pump can cause parts being disen
Air Release Valve Installation
gaged to be ejected with great force. Af
ter the pump completely cools, drain the
liquid from the pump by removing the
casing drain plug. Use caution when re
moving the plug to prevent injury to per
sonnel from hot liquid.
The Automatic Air Release Valve must be inde
pendently mounted in a horizontal position be
tween the pump discharge port and the inlet side of
the discharge check valve (see Figure 3). The inlet
opening in the Air Release Valve is equipped with
standard 1‐inch NPT pipe threads.
PAGE B - 6 INSTALLATION
Page 14
10 SERIES OM-00558
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
90_ LONG
RADIUS
ELBOW
BLEED LINE 1”
(25,4 MM) DIA. MIN.
(CUSTOMER FUR
NISHED) DO NOT EX
TEND BELOW PUMP
OFF LIQUID LEVEL
SUPPORT
BRACKET
CLEAN‐OUT
COVER
SUCTION
LINE
WET WELL
OR SUMP
DISCHARGE PIPE
DISCHARGE
CHECK VALVE
PUMP DISCHARGE
SELF‐PRIMING
CENTRIFUGAL
PUMP
Figure 3. Typical Automatic Air Release Valve Installation
Connect the valve outlet to a bleed line which
slopes back to the wet well or sump. The bleed line
must be the same size as the outlet opening or
larger, depending on which Air Release Valve is be
ing used. If piping is used for the bleed line, avoid
the use of elbows whenever possible.
NOTE
For multiple pump installations, it is recommended
that each Air Release Valve be fitted with an inde
pendent bleeder line directed back to the wet well.
If multiple Air Release Valves are installed in a sys
tem, do not direct bleeder lines to a common mani
fold pipe. Contact your Gorman‐Rupp distributor or
the Gorman‐Rupp Company for information about
installation of an Automatic Air Release Valve for
your specific application.
ALIGNMENT
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
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.
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
When checking alignment, disconnect
the power source to ensure that the
pump will remain inoperative.
PAGE B - 7INSTALLATION
Page 15
OM-00558 10 SERIES
when the hubs are the same distance apart at all
points (see Figure 4B).
Check parallel adjustment by laying a straightedge
Adjusting the alignment in one direction
may alter the alignment in another direc
tion. check each procedure after altering
alignment.
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
Coupled Drives
straightedge to measure the amount of misalign
ment.
When using couplings, the axis of the power
source must be aligned to the axis of the pump
V‐Belt Drives
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.
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 4C). In drive
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 de
systems using two or more belts, make certain that
the belts are a matched set; unmatched sets will
cause accelerated belt wear.
grees. The coupling is in alignment when the hub
ends are the same distance apart at all points (see
Figure 4A).
Figure 4A. Aligning Spider Type Couplings
MISALIGNED:
SHAFTS
NOT PARALLEL
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
Figure 4C. 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.
Figure 4B. Aligning Non‐Spider Type
Couplings
Align non‐spider type couplings by using a feeler
gauge or taper gauge between the coupling halves
every 90 degrees. The coupling is in alignment
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
PAGE B - 8 INSTALLATION
Page 16
10 SERIES OM-00558
parts can catch clothing, fingers, or
tools, causing severe injury to person
nel.
V‐BELT TENSIONING
General Rules of Tensioning
For new v‐belts, check the tension after 5, 20 and
50 hours of operation and re‐tension as required
(see the following procedure for measuring belt
tension). Thereafter, check and re‐tension if re
quired monthly or at 500 hour intervals, whichever
comes first.
Ideal v‐belt tension is the lowest tension at which
the belt will not slip under peak load conditions. Do
not over‐tension v‐belts. Over‐tensioning will short
en both v‐belt and bearing life. Under‐tensioning
will cause belt slippage. Always keep belts free
from dirt, grease, oil and other foreign material
which may cause slippage.
The ratio of deflection to belt span is 1:64 for both
ASA and metric units. Therefore, a belt with a span
of 64 inches would require a deflection of 1 inch at
the force shown on the Tables for your particular
application.
For example, if the span as measured in Figure 5 is
32 inches (813 mm), the v‐belt cross‐section is C,
the smallest sheave diameter is 8 inches, the pump
speed is 1250 RPM, and the belts are uncogged
Yy‐T type, then 11.5 lbs. of force on the tensioner
should show 1/2‐inch (12,7 mm) of deflection.
A tension tester is available as an option from Gor
man‐Rupp (P/N 29513-001). Other tension test
ers are available from your local belt/sheave dis
tributor, and work on a similar principal.
Tension Measurement
Correct v‐belt tension can be achieved using a v‐
belt tension tester and Table 1 or 2. Use the tables
to find the v‐belt size (cross‐section), the smallest
sheave diameter, the belt type for your application.
The corresponding deflection force required for
new or used belts is shown opposite the RPM
range of the pump.
Belt Span
Deflection
Figure 5. Belt Tension Measurement
To use the Gorman‐Rupp tensioner, measure the
belt span as shown in Figure 5. Position the bottom
of the large O‐ring on the span scale of the tension
er at the measured belt span. Set the small O‐ring
on the deflection force scale to zero.
Place the tension tester squarely on the belt at the
center of the belt span. Apply force on the plunger,
perpendicular to the belt span, until the bottom of
the large O‐ring is even with the top of the next belt,
or with the bottom of a straight edge laid across the
sheaves.
Read the force applied from the bottom of the small
O‐ring on the deflection force scale. Compare this
force with the value shown in Table 1 or 2 and ad
just the tension accordingly. Note that the tension
for new belts is higher than that for used belts to
allow for expected belt stretching. Do not over‐ten
sion used belts to the higher deflection forces
shown for new belts.
PAGE B - 9INSTALLATION
Page 17
OM-00558 10 SERIES
Table 1. Sheave Diameter (Inches)
Deflection Force (Lbs.)
Belt Deflection Force
Uncogged
Hy‐T Belts &
Uncogged
Hy‐T Torque
200‐850
200‐850
200‐850
200‐850
Team
Used
Belt
3.7
2.8
4.5
3.8
5.4
4.7
11.5
14.1
12.5
11.5
30.4
25.6
12.7
11.2
15.5
14.6
33.0
26.8
39.6
35.3
5.3
4.5
6.3
6.0
9.4
9.4
3.6
3.0
4.9
4.4
Cross
Section
A,AX
B,BX
C,CX
D
3V,
3VX
5V,
5VX
8V
Smallest
Sheave
Diameter
Range
3.0 ‐ 3.6
3.8 ‐ 4.8
5.0 ‐ 7.0
3.4 ‐ 4.2
4.4 ‐ 5.6
5.8 ‐ 8.6
7.0 ‐ 9.0
9.5 ‐ 16.0
12.0 ‐ 16.0
18.0 ‐ 20.0
2.2 ‐ 2.4
2.65 ‐ 3.65
4.12 ‐ 6.90
4.4 ‐ 6.7
7.1 ‐ 10.9
11.8 ‐ 16.0 500‐1740
12.5 ‐ 17.0
18.0 ‐ 22.4
R.P.M.
Range
1000‐2500
2501‐4000
1000‐2500
2501‐4000
1000‐2500
2501‐4000
860‐2500
2501‐4000
860‐2500
2501‐4000
860‐2500
2501‐4000
500‐1740
1741‐3000
500‐1740
1741‐3000
851‐1500
851‐1500
1000‐2500
2501‐4000
1000‐2500
2501‐4000
1000‐2500
2501‐4000
500‐1749
1750‐3000
3001‐4000
500‐1740
1741‐3000
1741‐3000
851‐1500
851‐1500
New
Belt
5.5
4.2
6.8
5.7
8.0
7.0
17.0
13.8
21.0
18.5
17.0
13.8
45.2
38.0
18.9
16.7
23.4
21.8
49.3
39.9
59.2
52.7
7.9
6.7
9.4
8.9
5.1
4.4
7.3
6.6
Cogged
Torque‐Flex
& Machined
Edge torque
Team Belts
Used
Belt
4.1
3.4
5.0
4.3
5.7
5.1
4.9
4.2
7.1
7.1
8.5
7.3
14.7
11.9
15.9
14.6
14.7
11.9
3.3
2.9
4.2
3.8
5.3
4.9
10.2
8.8
5.6
14.8
13.7
17.1
16.8
New
Belt
6.1
5.0
7.4
6.4
9.4
7.4
10.5
12.6
10.9
21.8
17.5
23.5
21.6
21.8
17.5
15.2
13.2
22.1
20.1
25.5
25.0
7.2
6.2
9.1
4.9
4.3
6.2
5.6
7.9
7.3
8.5
Table 2. Sheave Diameter (Millimeters)
Deflection Force (KG.)
Belt Deflection Force
Uncogged
Hy‐T Belts &
Uncogged
Hy‐T Torque
200‐850
200‐850
200‐850
200‐850
Team
Used
Belt
1.7
1.3
2.0
1.7
2.4
2.1
11.3
13.8
11.6
15.0
12.2
18.0
16.0
2.4
2.0
2.9
2.7
5.2
4.3
6.4
5.7
9.6
1.6
1.4
2.2
2.0
5.8
5.1
7.0
6.6
New
Belt
2.5
1.9
3.1
2.6
3.6
3.2
3.6
3.0
4.3
4.0
7.7
6.3
9.5
8.4
16.8
14.2
20.5
17.2
2.3
2.0
3.3
3.0
8.6
7.6
10.6
9.9
22.4
18.1
26.8
23.9
Cross
Section
A,AX
B,BX
C,CX
D
3V,
3VX
5V,
5VX
8V
Smallest
Sheave
Diameter
Range
75 ‐ 90
91 ‐ 120
125 ‐ 175
85 ‐ 105
106 ‐ 140
141 ‐ 220
175 ‐ 230
231 ‐ 400
305 ‐ 400
401 ‐ 510
91 ‐ 175
110 ‐ 170
171 ‐ 1275
276 ‐ 400 500‐1740
315 ‐ 430
431 ‐ 570
55 ‐ 60
61 ‐ 90
R.P.M.
Range
1000‐2500
2501‐4000
1000‐2500
2501‐4000
1000‐2500
2501‐4000
860‐2500
2501‐4000
860‐2500
2501‐4000
860‐2500
2501‐4000
500‐1740
1741‐3000
500‐1740
1741‐3000
851‐1500
851‐1500
1000‐2500
2501‐4000
1000‐2500
2501‐4000
1000‐2500
2501‐4000
500‐1749
1750‐3000
3001‐4000
500‐1740
1741‐3000
1741‐3000
851‐1500
851‐1500
Cogged
Torque‐Flex
& Machined
Edge torque
Team Belts
Used
Belt
1.9
1.5
2.3
2.0
2.6
2.3
2.2
1.9
3.2
3.2
3.9
3.3
6.7
5.4
7.2
6.6
1.5
1.3
1.9
1.7
2.4
2.2
4.6
4.0
2.5
6.7
6.2
7.8
7.6
New
Belt
10.7
10.0
11.6
11.3
2.8
2.3
3.4
2.9
4.3
3.4
3.3
2.8
4.8
4.1
5.7
4.9
9.9
7.9
9.8
2.2
2.0
2.8
2.5
3.6
3.3
6.9
6.0
3.9
9.1
PAGE B - 10 INSTALLATION
Page 18
10 SERIES
OM-00558
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 liquids which
may damage the pump or endanger per
sonnel 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).
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
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.
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.
Add liquid to the pump casing when:
STARTING
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.
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.
OPERATION PAGE C - 1
Page 19
OM-00558
10 SERIES
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
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
110_F (43_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 completely cool before servic
ing 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
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.
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
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). If the pump is fitted with a Gorman‐Rupp
double grease lubricated seal, the maximum in
coming pressure must be reduced to 10 p.s.i.
OPERATIONPAGE C - 2
Page 20
10 SERIES
OM-00558
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.
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.
Temperatures up to 160
normal for bearings, and they can operate safely to
at least 180
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.
_
F (82_C).
_
F (71_C) are considered
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.
BEARING TEMPERATURE CHECK
Bearings normally run at higher than ambient tem
peratures because of heat generated by friction.
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.
OPERATION PAGE C - 3
Page 21
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. Disconnect or lock out 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-0055810 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.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
Suction lift or discharge head too high. Check piping installation and in
Strainer clogged. Check strainer and clean if neces
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
Strainer clogged. Check strainer and clean if neces
Suction intake not submerged at
proper level or sump too small.
Clean or replace check valve.
Correct leak.
Replace suction hose.
leaking or worn seal or gasket.
stall bypass line if needed. See
INSTALLATION.
sary.
Correct leak.
Replace suction hose.
leaking or worn seal or gasket.
sary.
Check installation and correct sub
mergence as needed.
TROUBLESHOOTING PAGE D - 1
Page 22
OM-00558 10 SERIES
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)
PUMP REQUIRES
TOO MUCH
POWER
PUMP
CLOGS FRE
QUENTLY
Impeller or other wearing parts worn
or damaged.
Impeller clogged. Free impeller of debris.
Pump speed too slow. Check driver output; check belts
Discharge head too high. Install bypass line.
Suction lift too high. Measure lift w/vacuum gauge. Re
Pump speed too high. Check driver output; check that
Discharge head too low. Adjust discharge valve.
Liquid solution too thick. Dilute if possible.
Bearing(s) frozen. Disassemble pump and check
Liquid solution too thick. Dilute if possible.
Discharge flow too slow. Open discharge valve fully to in
Suction check valve or foot valve
clogged or binding.
Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.
or couplings for slippage.
duce lift and/or friction losses in
suction line.
sheaves or couplings are cor
rectly sized.
bearing(s).
crease flow rate, and run power
source at maximum governed
speed.
Clean valve.
EXCESSIVE NOISE Cavitation in pump.
Pumping entrained air.
Pump or drive not securely mounted.
Impeller clogged or damaged.
BEARINGS
RUN TOO HOT
Bearing temperature is high, but
within limits.
Low or incorrect lubricant. Check for proper type and level of
Suction and discharge lines not
properly supported.
Drive misaligned. Align drive properly.
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.
Clean out debris; replace dam
aged parts.
Check bearing temperature regu
larly to monitor any increase.
lubricant.
Check piping installation for
proper support.
TROUBLESHOOTINGPAGE D - 2
Page 23
OM-0055810 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 24
10 SERIES OM-00558
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 11 1/2A2-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
ferent due to such factors as viscosity, specific
gravity, elevation, temperature, and impeller trim.
Contact the Gorman‐Rupp Company to verify per
formance or part numbers.
Pump speed and operating condition
If your pump serial number is followed by an “N”,
your pump is NOT a standard production model.
MAINTENANCE & REPAIR PAGE E - 1
points must be within the continuous per
formance range shown on the curve.
Page 25
PARTS PAGE
10 SERIESOM-00558
SECTION DRAWING
Figure E-1. Pump Model 11 1/2A2-B
MAINTENANCE & REPAIRPAGE E - 2
Page 26
10 SERIES OM-00558
PARTS LIST
Pump Model 11 1/2A2-B
(From S/N 347543 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 SEE NOTE BELOW
2 IMPELLER 12368 10010 1
3 GREASE SEAL ASSY GS625 --- 1
. 4 PIPE PLUG P04 15079 1
. 5 FILL PLUG ASSY 48271-066 --- 1
6 NAME PLATE 38818-021 13990 1
7 DRIVE SCREW BM#04-03 17000 4
. 8 WARNING PLATE 2613EV 13990 1
. 9 DRIVE SCREW BM#04-03 17000 4
.10 STUD C0607 15991 4
11 HEX NUT D06 15991 4
12 GREASE CUP S36 --- 1
13 PIPE COUPLING AE04 15079 1
14 PIPE NIPPLE T0408 15079 1
15 SLINGER RING 3228 19120 1
16 RETAINING RING S240 --- 1
17 INBOARD BALL BEARING S1085 --- 1
18 VENTED PLUG 4823 15079 1
19 OUTBOARD BALL BRG S1085 --- 1
20 RETAINING RING S240 --- 1
21 BRG SHIM SET 8540 15990 1
22 SHAFT KEY N0307 15990 1
23 IMPELLER SHAFT 2931 15000 1
24 SEAL LINER 1904 14080 REF
25 IMP ADJUSTING SHIMS 513A 17090 REF
26 PEDESTAL 2928 10010 1
27 SEAL PLATE ASSY 2929 10010 1
28 CASING GASKET SET 504G 18000 1
29 WEAR PLATE ASSY 2643 15990 1
30 HEX NUT D04 15991 2
31 LOCKWASHER J04 15991 2
.32 CASING DRAIN PLUG P06 15079 1
33 BACK COVER GSKT 12369G 20000 1
34 CLAMP BAR SCREW 8618 24000 1
35 BACK COVER PLATE 12369 10010 1
.36 HEX HD CAPSCREW B0808 15991 2
37 CLAMP BAR 12370 11010 1
.38 STUD C0606 15991 4
39 HEX NUT D06 15991 4
40 SUCTION FLANGE 8599 10010 1
41 CHECK VALVE ASSY 1352 --- 1
42 -RD HD MACH SCREW X0403 17090 1
43 -LOCKWASHER J04 17090 1
44 -SM ALL VALVE WEIGHT 1354 15160 1
45 -CHECK VALVE 1352G 19070 1
46 -LARGE VALVE WEIGHT 1353 10010 1
NOT SHOWN:
ROTATION DECAL 2613M --- 1
G‐R DECAL GR-03 --- 1
INSTRUCTION LABEL 2613DK --- 1
LUBE DECAL 38816-075 --- 1
INSTRUCTION TAG 38817-010 --- 1
INSTRUCTION TAG 38817-011 --- 1
SUCTION STICKER 6588AG --- 1
PRIMING STICKER 6588AH --- 1
GREASE CUP INSTR 6588BD --- 1
DISCHARGE STICKER 6588BJ --- 1
OPTIONAL:
STRAINER 12383 24000 1
HI TEMP SHUT DOWN KITS:
-120_F 48313-257 --- 1
-130_F 48313-256 --- 1
-145_F 48313-186 --- 1
HIGH TEMP SHUTDOWN THERMOSTAT KIT:
-145_F 48313-172 --- 1
INDICATES PARTS RECOMMENDED FOR STOCK
. INCLUDED WITH 46471-513 --- 1
REPAIR PUMP CASING ASSY
MAINTENANCE & REPAIR PAGE E - 3
Page 27
OM-00558 10 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.
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.
Suction Check Valve Removal
and Disassembly
Before attempting to service the pump, remove the
pump casing drain plug (32) and drain the pump.
Clean and reinstall the drain plug.
To service the suction check valve, remove the suc
tion piping. Remove the nuts (39) securing the suc
tion flange (40) and the check valve assembly (41)
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
(42 and 43) and separate the valve gasket (45) and
weights (44 and 46).
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.
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.
Back Cover Removal
The wear plate assembly (29) is easily accessible
and may be serviced by removing the back cover
assembly (35). Loosen the clamp bar screw (34)
and remove the clamp bar (37). Pull the back cover
and wear plate from the pump casing. Remove the
back cover gasket (33). Clean the mating surfaces
of the back cover plate and pump casing.
Inspect the wear plate and replace it if badly scored
or worn. To remove the wear plate, disengage the
hardware (30 and 31) securing it to the back cover.
If no further disassembly is required, see Back
Cover Installation.
MAINTENANCE & REPAIRPAGE E - 4
Page 28
OM-0055810 SERIES
Pump Casing Removal
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi
cient capacity and that they are posi
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
To service the impeller (2), wear plate assembly
(29) and seal assembly (3), disconnect the dis
charge piping. Remove the hardware securing the
pump casing (1) to the base. Disconnect the power
source. Tie and tag any leveling shims used under
the pump mounting feet to ease reassembly.
Remove the nuts (11) securing the pump casing
and gasket set (28) to the pedestal (26) and seal
plate (27). Separate the casing from the seal plate
and pedestal.
Remove the gasket set (28) from the pedestal and
seal plate. Clean the mating surfaces of the seal
plate and pump casing. Tie and tag the gaskets, or
measure and record their thickness for ease of
reassembly.
Impeller Removal
Before removing the impeller, turn the cross arm on
the automatic grease cup (12) clockwise until it rest
against the cover (see Figure 4). This will prevent
the grease from escaping when the impeller is re
moved.
Immobilize the impeller by wedging a block wood
between the vanes. If removed, install the shaft
key (22). Install a lathe dog on the drive end of the
shaft (23) 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.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Heavy
Bar Stock
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 (25)
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 and 3)
Remove the grease cup and piping (12, 13 and 14)
from the seal plate. Slide the seal plate and seal as
sembly off the shaft as a unit. Carefully remove the
rotating and stationary seal elements, packing
rings, stationary washers, seal spring and shaft
sleeve from the seal plate.
Inspect the seal liner (24) for wear or grooves
which could cause leakage or damage to the seal
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
MAINTENANCE & REPAIR PAGE E - 5
Page 29
OM-00558 10 SERIES
packing rings. The seal liner is a press fit in the seal
plate and does not normally require replacement.
If seal liner replacement is required, refer to Seal
Reassembly and Installation.
To prevent damage during removal from
If no further disassembly is required, see Seal
Reassembly and Installation.
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
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.
ings are removed.
Clean the pedestal, shaft and all component parts
(except the bearings) with a soft cloth soaked in
cleaning solvent. Inspect the parts for wear or dam
age and replace as necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly‐
equipped shop by qualified personnel.
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain
ers.
Remove the slinger ring (15) and shaft key (22).
Use snap ring pliers to remove the outboard retain
ing ring (20) and remove the bearing adjusting
shims (21). Tie and tag the shims or measure and
record their thickness for ease of reassembly.
NOTE
There are no provisions for draining the lubricant
from the pedestal. Place a drip pan under the ped
estal before disassembly.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear
ings (17 and 19) from the pedestal. Be careful not
to damage the shaft.
It is not necessary to remove the inboard bearing
retaining ring (16) unless replacement is required.
Use snap ring pliers to remove the retaining ring if
necessary.
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.
The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the pedestal.
Replace the bearings, shaft, or pedestal if the
proper bearing fit is not achieved.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.
If bearing replacement is required, use a bearing
puller to remove the bearings from the shaft.
MAINTENANCE & REPAIRPAGE E - 6
Page 30
Shaft And Bearing Reassembly
And Installation
OM-0055810 SERIES
Clean and inspect the bearings as indicated in
Shaft and Bearing Removal and Disassembly.
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.
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.
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
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.
After installation, pack the bearings by hand with
No. 0 lithium base grease until fully lubricated.
NOTE
When installing the bearings, be sure to install them
with the offset of the bearings in the direction as
shown in Figure 1 (seals toward the outside of the
bearing cavity).
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.
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 against the shaft shoulders. This should be
done quickly, in one continuous motion, to prevent
the bearings from cooling and sticking on the shaft.
If removed, install the inboard bearing retaining
ring (16) in the groove in the pedestal I.D.
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing is fully seated
against the bearing retaining ring.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Install the same thickness of bearing adjusting
shims (21) as previously removed. Install the out
board bearing retaining ring (20).
NOTE
Shaft endplay should be between .002 and .010
inch (0,05 to 0 ,25 mm). Add or remove bearing ad
justing shims to achieve the correct endplay.
MAINTENANCE & REPAIR PAGE E - 7
Page 31
OM-00558 10 SERIES
Install the slinger ring (15) and shaft key (22). Install
any leveling shims used under the pedestal feet.
Secure the pedestal to the base using the pre
viously removed mounting hardware.
Lubricate the pedestal as indicated in LUBRICA
TION at the end of this section.
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.
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 seal
liner (24) with water or a very small amount of oil,
and apply a drop of light lubricating oil on the fin
ished faces. Assemble the seal as follows, (see Fig
ure 3).
MAINTENANCE & REPAIRPAGE E - 8
Page 32
SEAL PLATE
SPRING
OM-0055810 SERIES
STATIONARY
ELEMENT
IMPELLER
IMPELLER
SHIMS
ROTATING
ELEMENT
STATIONARY
WASHER
PACKING RINGS
Figure 3. Seal Assembly
SEAL LINER
ROTATING
ELEMENT
IMPELLER
SHAFT
SHAFT
SLEEVE
STATIONARY
ELEMENT
This seal is not designed for operation at
temperatures above 110_F (43_C). Do not
use at higher operating temperatures.
Before installing the seal, inspect the bore of the
seal liner (24) for wear or grooves which might
cause leakage or damage to the seal packing
rings. If the seal liner requires replacement, re
move the seal plate assembly as described in Seal
Removal And Disassembly, and position it on the
bed of an arbor (or hydraulic) press. Use a new
sleeve to force the old one out. After the new liner is
properly installed, a 1/4‐inch (6,4 mm) diameter
hole must be drilled through it to permit the flow of
lubricant to the seal assembly. Be careful to center
the drill in the threaded grease piping hole and not
damage the threads. Deburr the hole from the in
side of the seal liner after drilling.
Slide the seal plate assembly over the impeller
shaft (23) and temporarily secure the seal plate to
the pedestal (26) using two capscrews and nuts
(3/8-16 UNC x 1-1/2 inch long, not supplied).
Slide the inboard rotating element into the lubri
cated seal liner with the chamfered side toward the
shaft shoulder.
Subassemble the inboard stationary element,
packing ring and stationary washer. Press this unit
into the lubricated seal liner until the seal faces
contact. A push tube cut from a length of plastic
pipe would aid this installation. The I.D. of the tube
should be approximately the same size as the I.D.
of the seal spring.
Slide the spacer sleeve onto the shaft until it seats
against the inboard rotating element and install the
seal spring.
Subassemble the outboard stationary element,
packing ring and stationary washer. Press this unit
into the lubricated seal liner. Install the outboard ro
tating element with the chamfered side toward the
impeller.
MAINTENANCE & REPAIR PAGE E - 9
Page 33
OM-00558 10 SERIES
Lubricate the seal assembly as indicated in LU
BRICATION after the impeller has been installed.
Impeller Installation and Adjustment
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (25) as previously removed, and screw the
impeller onto the shaft until tight.
A clearance of .010 to .012 inch (0,25 to 0,30 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.
Install the automatic grease cup and piping (12, 13
and 14) in the seal plate. After the pump casing is
installed, lubricate the seal assembly as indicated
in LUBRICATION.
Pump Casing Installation
Remove the hardware temporarily securing the
seal plate to the pedestal. Install the same thick
ness of pump casing gaskets (28) as previously re
moved. Secure the pump casing (1) to the seal
plate and pedestal with the nuts (11). Do not fully
tighten the nuts at this time.
NOTE
The back cover assembly must be in place to adjust
the impeller face clearance.
taching hardware (30 and 31) at this time. The wear
plate must be concentric to prevent binding when
the back cover is installed.
Clean any scales or debris from the contacting sur
faces on the pump casing that might prevent a
good seal with the back cover. Replace the back
cover gasket (33) and slide the back cover assem
bly into the pump casing. Be sure the wear plate
does not bind against the impeller.
NOTE
To ease future disassembly, apply a film of grease
or `Never‐Seez' on the back cover shoulder, or any
surface that contacts the pump casing. This action
will reduce rust and scale build‐up.
Secure the back cover assembly by installing the
clamp bar (37) and tightening the clamp bar screw
(34). Do not over‐tighten the clamp bar screw; it
should be just tight enough to seal the back cover
shoulder.
Suction Check Valve Installation
Inspect components of the check valve assembly
(41) and replace as required. If separated at disas
sembly, assemble the check valve weights (44 and
46) to the check valve gasket (45) with the hard
ware (42 and 43).
Position the check valve assembly in the suction
port with the large weight toward the inside of the
pump casing. Install the suction flange (40) and se
cure with the nuts (39). Check the operation of the
check valve to ensure proper seating and free
movement.
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 (28) 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.
Back Cover Installation
If the wear plate (29) was removed for replace
ment, secure it to the cover plate (35) using the at
Final Pump Assembly
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 (5) and tighten it.
Refer to OPERATION, Section C, before putting
the pump back into service.
MAINTENANCE & REPAIRPAGE E - 10
Page 34
OM-0055810 SERIES
LUBRICATION
Seal Assembly
(Figures 1 and 4)
Fill the grease cup (12) through the grease fitting
with No. 2 lithium base grease until grease es
POSITION
WHEN
EMPTY
GREASE
FITTING
capes from the relief hole. Turn the grease cup arm
counterclockwise until it is at the top of the stem;
this will release the spring to apply grease to the
seal (see Figure 4).
POSITION
FOR
FILLING
CROSS
ARM
RELIEF
HOLE
POSITION
WHEN
IN USE
Figure 4. Automatic Lubricating Grease Cup
Bearings
The pedestal was fully lubricated when shipped
from the factory. Under normal conditions, remove
the vented plug (18) and add one shot of No. 0 lithi
um base grease from a grease gun after each 250
hours of operation or once each month, whichever
comes first. Do not over lubricate. Over lubrication
can cause the bearings to over heat, resulting in
premature bearing failure.
There are no provisions in the bearing cavity to
drain or flush the lubricant. The pump and pedestal
must be disassembled to completely clean and
maintain this cavity.
Under normal conditions, change the grease after
each 5000 hours of operation, or at 12 month inter
vals, whichever comes first. Change the grease
more frequently if the pump is operated continu
ously or installed in an environment where variable
hot and cold temperatures are common.
When lubricating a dry (overhauled) pedestal, fill
the cavity with approximately 1.5 ounces (43
grams) of grease.
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.
Power Source
Consult the literature supplied with the power
source, or contact your local power source repre
sentative.
MAINTENANCE & REPAIR PAGE E - 11
Page 35
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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