Page 1
ACDE
OM‐00632‐03
March 26, 1980
Rev. F 12‐05‐2013
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
10 SERIES PUMP
MODEL
13A20-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/register.
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 - 3.............................................................
SUCTION AND DISCHARGE PIPING PAGE B - 3.........................................
Materials PAGE B - 3..............................................................
Line Configuration PAGE B - 3......................................................
Connections to Pump PAGE B - 3..................................................
Gauges PAGE B - 3...............................................................
SUCTION LINES PAGE B - 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 - 4........................................................
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 - 2..................................................
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-00632
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 cast iron, with duc
tile iron impeller.
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.
For information or technical assistance on the pow
er source, contact the power source manufactur
er's local dealer or representative.
St. Thomas, Ontario N5P 3R7
Phone: (519) 631-2870
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
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-00632
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. 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
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 volatile or flam
mable liquids which may damage the
pump or endanger 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-00632
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.
Do not operate the pump without
shields and/or guards in place over the
drive shafts, belts, and/or couplings, or
other rotating parts. Exposed rotating
parts can catch clothing, fingers, or
tools, causing severe injury to person
nel.
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-00632
INSTALLATION - SECTION B
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this
section offers only general recommendations and
practices required to inspect, position, and ar
range the pump and piping.
Most of the information pertains to a standard
static lift application where the pump is positioned
above the free level of liquid to be pumped.
If installed in a flooded suction application where
the liquid is supplied to the pump under pressure,
some of the information such as mounting, line
configuration, and priming must be tailored to the
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 B-1 for the approximate physical di
mensions of this pump.
Figure B-1. Pump Model 13A20-B
PAGE B - 1INSTALLATION
Page 9
OM-00632 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. Note that the pump shaft rotates in
the required direction.
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.
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-00632
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
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.
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.
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 1‐1/2 inch
(38,1 mm) diameter spherical solids.
Sealing
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.
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-00632 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.
shows recommended minimum submergence vs.
velocity.
Figure B-2
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 B-2. Recommended Minimum Suction Line Submergence vs. Velocity
PAGE B - 4 INSTALLATION
Page 12
10 SERIES OM-00632
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.
A check valve in the discharge line is normally rec
ommended, but it is not necessary in low dis
charge head applications.
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.
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 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.
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
PAGE B - 5INSTALLATION
Page 13
OM-00632 10 SERIES
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.
A manual shut‐off valve should not be
installed in any bypass line. A manual
shut‐off valve may inadvertently be left
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
tures, and vapor pressure within the
pump can cause parts being disen
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.
AUTOMATIC AIR RELEASE VALVE
When properly installed, a Gorman‐Rupp Auto
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.
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.
Air Release Valve Installation
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-00632
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
90_ LONG
RADIUS
ELBOW
BLEED LINE 1”
(25,4 MM) DIA. MIN.
(CUSTOMER FUR
NISHED) EXTEND 6”
(152 MM) 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
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
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.
PAGE B - 7INSTALLATION
Page 15
OM-00632 10 SERIES
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.
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 4A).
Figure 4B. Alignment of V‐Belt Driven Pumps
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 4C). In drive
systems using two or more belts, make certain that
the belts are a matched set; unmatched sets will
cause accelerated belt wear.
Figure 4A. Alignment of V‐Belt Driven Pumps
Align non‐spider type couplings by using a feeler
MISALIGNED:
SHAFTS
NOT PARALLEL
Figure 4C. Alignment of V‐Belt Driven Pumps
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
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 4B).
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
PAGE B - 8 INSTALLATION
Page 16
10 SERIES OM-00632
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
guard in place over the rotating parts.
Exposed rotating parts can catch cloth
ing, fingers, or tools, causing severe in
jury to personnel.
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.
Tension Measurement
Belt Span
Deflection
Figure 5. Belt Tension Measurement
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.
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.
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.
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-00632 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-00632
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
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.
STARTING
Consult the operations manual furnished with the
power source.
Rotation
The correct direction of pump rotation is indicated
by an arrow on the pump body or accompanying
decals. If the pump is operated in the wrong direc
tion, the impeller could become loosened from the
shaft and seriously damage the pump.
The pump must operate in the direction in
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
dicated by the arrow on the pump, or ac
companying decals. Reverse rotation
could loosen the impeller and seriously
damage the pump.
Page 19
OM-00632 10 SERIES
Consult the operating manual furnished with the
pump 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
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 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
power source. Priming is indicated by a positive
reading on the discharge pressure gauge or by a
quieter operation. The pump may not prime imme
diately 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).
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge
in the system, using pipe dope on the threads.
OPERATIONPAGE C - 2
Page 20
10 SERIES
OM-00632
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.
normal for bearings, and they can operate safely to
at least 180_F (82_C).
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.
If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.
After stopping the pump, disconnect the power
source or lock it out 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.
Temperatures up to 160_F (71_C) are considered
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-0063210 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 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.
Suction intake not submerged at
proper level or sump too small.
Impeller or other wearing parts worn
or damaged.
Clean or replace check valve.
leaking or worn seal or gasket.
bypass line if needed. See INSTAL
LATION.
sary.
Check installation and correct
submergence as needed.
Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.
TROUBLESHOOTING PAGE D - 1
Page 22
OM-00632 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
FREQUENTLY
Leaking or worn seal or pump gasket. Check pump vacuum. Replace
leaking or worn seal or gasket.
Free impeller of debris.Impeller clogged.
Pump speed too slow. Check driver output; check belts
or couplings for slippage.
Pump running backwards. Check direction of rotation and
correct by interchanging any two
motor leads at control box. (See
Pump Rotation, Section C).
Suction lift or discharge head too high. Check piping installation and install
bypass line if needed. See INSTAL
LATION.
Pump speed too high. Check driver output check that
sheaves or couplings are correctly
sized.
Discharge head too low.
Discharge flow too slow.
Suction check valve or foot valve
clogged or binding.
Adjust discharge valve.
Dilute if possible.Liquid solution too thick.
Open discharge valve fully to in
crease flow rate, and run power
source 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 bearing temperature regular
ly to monitor any increase.
Check for proper type and level of
lubricant.
Check piping installation for proper
support.
Align drive properly.Drive misaligned.
BEARINGS RUN
TOO HOT
Pumping entrained air.
Impeller clogged or damaged. Clean out debris; replace damaged
Bearing temperature is high, but
within limits.
Low or incorrect lubricant.
Suction and discharge lines not prop
erly supported.
TROUBLESHOOTINGPAGE D - 2
Page 23
OM-0063210 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-00632
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 13A20-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-00632
SECTION DRAWING
Figure E-1. Pump Model 13A20-B
MAINTENANCE & REPAIRPAGE E - 2
Page 26
10 SERIES OM-00632
PARTS LIST
Pump Model 13A20-B
(From S/N 712987 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 2996C 11010 1
3 SEAL ASSY 12451A --- 1
. 4 PIPE PLUG P04 15079 1
. 5 FILL PLUG ASSY 48271-068 --- 1
6 PIPE NIPPLE T0206 15079 1
7 PIPE COUPLING AE02 15079 1
8 BOTTLE OILER S1933 --- 1
9 SEAL PLATE 38272-344 10010 1
10 OIL SEAL S506 --- 1
11 SHAFT SLEEVE 12449 16000 1
12 SLINGER RING 3272 19120 1
13 OIL SEAL 25227-311 --- 1
14 BALL BEARING 23275-008 --- 1
15 AIR VENT S1703 --- 1
16 PEDESTAL 3114B 10010 1
17 ROTATION DECAL 2613M --- 1
18 O‐RING 25152-235 --- 1
19 BEARING RETAINER 38322-521 26000 1
20 RETAINING RING S247 --- 1
21 OIL SEAL 25227-303 --- 1
22 SHAFT KEY N0407 15990 1
23 IMPELLER SHAFT 38514-549 15010 1
24 ALLEN HD SETSCREW GA#10-01S 15990 2
25 BEARING ADJ SHIM SET 48261-009 --- 1
26 BALL BEARING 23275-008 --- 1
27 SIGHT GAUGE 26714-011 --- 1
28 PIPE PLUG P06 15079 1
29 PEDESTAL DRAIN PLUG P06 15079 1
30 SEAL CVTY DRAIN PLUG P02 15079 1
.31 STUD C0607 15991 8
32 HEX NUT D06 15991 8
33 CASING GASKET SET 3G 18000 1
34 IMP ADJ SHIM SET 2X 17090 REF
35 WEAR PLATE ASSY 2634A 15990 1
36 IMPELLER WASHER 10474 15030 1
37 SOC HD CAPSCREW DM0603 15991 1
38 HEX NUT D06 15991 2
39 LOCK WASHER J06 15991 2
.40 CASING DRAIN PLUG P08 15079 1
41 BACK COVER GASKET 2985G 19090 1
42 BACK CVR PLATE ASSY 42111-921 --- 1
43 -WARNING PLATE 2613EV 13990 1
44 -DRIVE SCREW BM#04-03 17000 4
45 -BACK COVER NOT AVAILABLE 1
46 -PIPE PLUG P04 15079 1
47 CLAMP 2987 11010 1
48 CLAMP BAR SCREW 2536 24000 1
49 NAME PLATE 38818-023 13990 1
50 DRIVE SCREW BM#04-03 17000 4
51 HEX HD CAPSCREW B0805 15991 4
52 LOCK WASHER J08 15991 4
53 FLAP VALVE ASSY 1348 --- 1
54 -FLAP VALVE GASKET 1348G 19070 1
55 -SMALL VALVE WT 18B 10010 1
56 -RD HD MACH SCREW X0504 17090 1
57 -LOCK WASHER J05 17090 1
58 LARGE VALVE WT 2944 10010 1
59 PIPE PLUG P04 15079 1
60 SUCTION FLANGE 2943 10010 1
NOT SHOWN:
G‐R DECAL GR-03 --- 1
INSTRUCTION LABEL 2613DK --- 1
LUBE DECAL 38816-079 --- 1
INSTRUCTION TAG 38817-011 --- 1
INSTRUCTION TAG 38817-012 --- 1
SUCTION STICKER 6658AG --- 1
PRIMING STICKER 6588AH --- 1
DISCHARGE STICKER 6588BJ --- 1
OPTIONAL:
STRAINER 4917 24001 1
FLANGED SUCTION:
-FLANGE 1753A 10010 1
-NIPPLE T48 15079 1
FLANGED DISCHARGE:
-FLANGE 1753A 10010 1
-PIPE NIPPLE T48 15079 1
CASING HEATER:
-120V 47811-044 --- 1
-240V 47811-045 --- 1
HI TEMP SHUT‐DOWN KITS:
-145_ F 48313-186 --- 1
-130_ F 48313-256 --- 1
-120_ F 48313-257 --- 1
HIGH TEMP SHUT‐DOWN THERMOSTAT KIT:
-145_ F 48313-172 --- 1
INDICATES PARTS RECOMMENDED FOR STOCK
. INCLUDED WITH 46471-508 --- 1
REPAIR PUMP CASING ASSY
MAINTENANCE & REPAIR PAGE E - 3
Page 27
10 SERIESOM-00632
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY
Review all SAFETY information in Section A.
Follow the instructions on all tags, label and de
cals attached to the pump.
This pump requires little service due to its rugged,
minimum‐maintenance design. However, if it be
comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the sectional view (see Figure E-1) and the ac
companying parts list.
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, disconnect
or lock out the power source to ensure that the
pump will remain inoperative. Close all valves in the
suction and discharge lines.
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.
Suction Check Valve Removal
and 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 assembly (53),
remove the suction piping. Remove the hardware
(51 and 52) securing the suction flange (60) and
check valve assembly to the pump casing (1). Sep
arate the suction flange and check valve assembly
from the pump casing.
Inspect the check valve parts for wear or damage.
If replacement is required, remove the hardware
(56 and 57) and separate the check valve gasket
(54) and weights (55 and 58).
If no further disassembly is required, see Suction
Check Valve Installation.
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. Disconnect or lock out the power
source to ensure that the pump will
remain inoperative.
Back Cover Removal
The wear plate (35) is easily accessible and may be
serviced by removing the back cover assembly
(42). Loosen the clamp bar screw (48) and remove
the clamp bar (47). Pull the back cover and wear
plate from the pump casing. Remove the back cov
er gasket (41). 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 (38 and 39) securing it to the back cover.
If no further disassembly is required, see Back
Cover Installation.
MAINTENANCE & REPAIRPAGE E - 4
Page 28
OM-0063210 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 or seal assembly, discon
nect the discharge piping. Remove the hardware
securing the pump to the base. Disconnect the
power source.
Remove the nuts (32) and separate the pump cas
ing and gasket set (33) from the seal plate (9) and
pedestal (16). Clean the mating surfaces of the
seal plate and pump casing. Tie and tag the casing
gaskets, or measure and record their thickness for
ease of reassembly.
Tie and tag any leveling shims used under the
pump casing mounting feet to ease reassembly.
With the impeller rotation still blocked, use 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 E-2. Use caution not to damage the shaft
or keyway. When the impeller breaks loose, re
move the lathe dog and wood block.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Heavy
Bar Stock
Figure E-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 (34)
off the impeller shaft. Tie and tag the shims or mea
sure and record their thickness for ease of reas
sembly.
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Seal Removal and Disassembly
Impeller Removal
Before removing the impeller, remove the bottle oil
er and piping (6, 7 and 8). Remove the seal cavity
drain plug (30) and drain the cavity to prevent the
oil from escaping when the impeller is removed.
Clean and reinstall the drain plug.
Disconnect the powers source.
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.
MAINTENANCE & REPAIR PAGE E - 5
Remove the spring centering washer and seal
spring. Slide the shaft sleeve (11) and rotating por
tion of the seal off the shaft as a single unit. Apply oil
to the sleeve and work it up under the bellows.
Slide the rotating portion of the seal off the sleeve.
Slide the seal plate and stationary portion of the
seal assembly off the shaft as a unit. Position the
seal plate on a flat surface with the impeller side
down. Use a suitably sized dowel to press the seal
stationary components from the seal plate bore.
Position the seal plate on a flat surface with the im
peller side up and press the oil seal (10) from the
seal plate.
Page 29
Inspect the seal plate and replace it if cracked or
badly worn.
If no further disassembly is required, see Seal
Reassembly and Installation.
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.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly‐
equipped shop by qualified personnel.
Remove the pedestal drain plug (29) and drain the
bearing lubricant. Clean and reinstall the drain
plug.
Remove the slinger ring (12).
Use snap ring pliers to remove the bearing retain
ing ring (20) 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 (24) from the bearing re
tainer (19) and install two 10-32 UNF by 1 inch
long screws (not supplied) in the holes. Use two
screwdrivers to pry against the heads of the screws
to remove the bearing retainer from the pedestal
bore. Do not use the screws as jacking screws to
remove the retainer. Remove the screws from the
retainer and reinstall the setscrews.
Press the oil seal (21) from the bearing retainer. Re
move the bearing retainer O‐ring (18) from the
groove in the pedestal bore.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear
ings (14 and 26) from the pedestal. Be careful not
to damage the shaft.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.
10 SERIESOM-00632
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
(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
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 for thread damage on the impeller end. Dress
small nicks and burrs with a fine file or emery cloth.
Replace 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.
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.
MAINTENANCE & REPAIRPAGE E - 6
Page 30
If bearing replacement is required, use a bearing
puller or an arbor (or hydraulic) press to remove
the bearings from the shaft.
OM-0063210 SERIES
Press the inboard oil seal (13) from the pedestal
bore.
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 bear
ings are removed.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear
ings should never be heated with a direct flame or
directly on a hot plate.
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.
Position the inboard oil seal (13) in the pedestal
(16) with the lip positioned as shown in Figure
E-1. Press the oil seal into the pedestal until the
face is just flush with the machined surface in the
pedestal.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Slide the shaft and assembled bearings into the
pedestal until the inboard bearing seats against
the pedestal bore. Be careful not to roll or damage
the lip of the oil seal (13).
Install a new O‐ring (18) in the groove in the pedes
tal and lubricate it with light grease.
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.
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
away from the shaft shoulders in shrinking. If
movement has occurred, use a suitably sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
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.
Press the outboard oil seal (21) into the bearing re
tainer (19) with the lip positioned as shown in Fig
ure E-1. Be sure the setscrews (24) are fully
screwed into the bearing retainer. Position the
bearing retainer in the pedestal bore with the set
screws positioned horizontally in line. Be careful
not to damage the lip of the oil seal (21) on the shaft
keyway. Press the bearing retainer into the pedes
tal until it is fully seated against the outboard bear
ing.
Install the same thickness of bearing adjusting
shims (25) as previously removed. Secure the
bearing retainer and shims using the bearing re
taining ring (20) and check the shaft endplay.
NOTE
Shaft endplay should be between .002 and .010
inch (.05 to .25 mm). Add or remove bearing adjust
ing shims to achieve the correct endplay.
Slide the slinger ring (12) onto the shaft.
Lubricate the pedestal as indicated in LUBRICA
TION at the end of this section.
MAINTENANCE & REPAIR PAGE E - 7
Page 31
10 SERIESOM-00632
Seal Reassembly and Installation
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.
Inspect the impeller shaft for damage. Small
scratches or nicks may be removed with a fine file
or emery cloth. If excessive wear exists, the shaft
will have to be replaced.
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
SPRING CENTERING
WASHER
IMPELLER
SHIMS
BELLOWS
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 (11), or re
place it if there are nicks or cuts on either end. If any
components 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 (11) 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 E-3).
SEAL PLATE
STATIONARY
SEAT
OIL SEAL
IMPELLER
SHAFT
IMPELLER
SPRING
RETAINER
STATIONARY
ELEMENT
SHAFT
SLEEVE
O‐RINGS
ROTATING ELEMENT
Figure E-3. Seal Assembly
MAINTENANCE & REPAIRPAGE E - 8
Page 32
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 (9) on a flat surface with the
impeller side down. Apply a light coating of oil to
the oil seal (10) and press it into the seal plate with
the lip positioned as shown in Figure E-1.
OM-0063210 SERIES
A clearance of .020 to .040 inch (0,51 to 1,02 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 bottle oiler and piping (6, 7 and 8).
Position the seal plate on a flat surface with the im
peller side up. Press the stationary subassembly
(consisting of the stationary seat, O‐rings and sta
tionary element) into the seal plate until fully seated
in the seal plate bore.
Slide the seal plate over the shaft until fully seated
against the pedestal (16). Be careful not to dam
age the lip of the oil seal (10) on the shaft threads.
Align the threaded hole for the bottle oiler piping
with the opening in the top of the pedestal and tem
porarily secure the seal plate using two capscrews
and nuts (3/8-16 UNC by 1-1/2 inches long, not
supplied).
Lubricate the shaft sleeve (11) with light oil and
slide the rotating subassembly (consisting of the
rotating element, retainer and bellows) onto the
sleeve until the rotating element is just flush with
the chamfered end of the sleeve. Slide the shaft
sleeve and rotating subassembly onto the shaft
until the sealing faces contact. Continue to push
the sleeve through the seal until it bottoms against
the shaft shoulder. Be careful not to damage or roll
the lip of the oil seal (10). Install the seal spring and
spring centering washer.
Pump Casing Installation
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 and secure the pump casing (1) to the seal
plate and pedestal with the nuts (32). Do not fully
tighten the nuts at this time.
NOTE
The back cover assembly must be in place to adjust
the impeller face clearance.
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
between the impeller and the wear plate (35) is also
recommended 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 .010 inch (0,25 mm) of gaskets.
After the face clearance has been set, tighten the
nuts (32) securing the pump casing to the pedes
tal.
Back Cover Installation
Lubricate the seal assembly as indicated in
LUBRICATION, after the impeller has been in
stalled.
Impeller Installation and Adjustment
Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (34) as previously removed and screw the
impeller onto the shaft until tight.
MAINTENANCE & REPAIR PAGE E - 9
If the wear plate (35) was removed for replace
ment, secure it to the back cover assembly (42) us
ing the attaching hardware (38 and 39). The wear
plate must be concentric to prevent binding when
the back cover assembly is installed.
Clean any scale or debris from the contacting sur
faces on the pump casing that might prevent a
good seal with the back cover.
NOTE
To ease future disassembly, apply a film of grease
Page 33
10 SERIESOM-00632
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.
Replace the back cover gasket (41) and slide the
back cover assembly into the pump casing.
Secure the back cover assembly by installing the
clamp bar (47) and tightening the clamp bar screw
(48). Do not over‐tighten the clamp bar screw; it
should be just tight enough to seal the back cover
shoulder.
Check for scraping or binding between the impel
ler and wear plate and correct any that exists be
fore putting the pump back into service.
Suction Check Valve Installation
Inspect the check valve components and replace
as required. Subassemble the check valve weights
(55 and 58) and check valve gasket (54) using the
attaching hardware (56 and 57).
Position the check valve assembly (53) against the
face of the suction flange with the large weight to
ward the inside of the pump casing. Secure the
check valve assembly and suction flange to the
pump casing with the hardware (51 and 52).
Check the operation of the check valve to ensure
proper seating and free movement.
Remove the fill plug assembly (5) and fill the pump
casing with clean liquid. Reinstall the fill plug and
tighten it.
Refer to OPERATION, Section C, before putting
the pump back into service.
LUBRICATION
Seal Assembly
Fill the bottle oiler (8) with SAE No. 30 non‐deterg
ent 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 (27) 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 (15). Do not over‐lubricate. Over‐lu
brication can cause the bearings to over‐heat, re
sulting in premature bearing failure.
Under normal conditions, drain the pedestal once
each year and refill with clean oil to the middle of
the sight gauge. Change the oil more frequently if
the pump is operated continuously or installed in
an environment with rapid temperature change.
Final Pump Assembly
Secure the pump to the base with the previously re
moved hardware. Be sure to reinstall any leveling
shims used under the pump casing or pedestal
mounting feet. Install the shaft key (22) and con
nect the power source.
Be sure the pump and power source are securely
mounted to the base.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure. Open all the
valves in the suction and discharge lines.
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.
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
Consult the literature supplied with the power
source, or contact your local power source repre
sentative.
MAINTENANCE & REPAIRPAGE E - 10
Page 34
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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