Page 1
CDS
OM‐01046-OB07
February 14, 1983
Rev. Q 03‐06‐2013
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
T SERIES PUMPS
MODELS
T6A3‐B
INCLUDING: /F, /FM
THE GORMAN‐RUPP COMPANY MANSFIELD, OHIO
www.grpumps.com
GORMAN‐RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
1983 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 - 2.........................................
Materials PAGE B - 2..............................................................
Line Configuration PAGE B - 3......................................................
Connections to Pump PAGE B - 3..................................................
Gauges PAGE B - 3...............................................................
SUCTION LINES PAGE B - 3...........................................................
Fittings PAGE B - 3...............................................................
Strainers PAGE B - 3..............................................................
Sealing PAGE B - 3...............................................................
Suction Lines In Sumps PAGE B - 3.................................................
Suction Line Positioning PAGE B - 4................................................
DISCHARGE LINES PAGE B - 4........................................................
Siphoning PAGE B - 4.............................................................
Valves PAGE B - 4................................................................
Bypass Lines PAGE B - 5..........................................................
AUTOMATIC AIR RELEASE VALVE PAGE B - 6...........................................
Theory of Operation 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...........................................................
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 - 3.........................................................
Pump Vacuum Check PAGE C - 3..................................................
STOPPING PAGE C - 3................................................................
Cold Weather Preservation PAGE C - 3..............................................
BEARING TEMPERATURE CHECK PAGE C - 3..........................................
i
Page 4
TABLE OF CONTENTS
(continued)
TROUBLESHOOTING - SECTION D PAGE D - 1..............................
PREVENTIVE MAINTENANCE SCHEDULE PAGE D - 3...................................
PUMP MAINTENANCE AND REPAIR - SECTION E PAGE E - 1................
PERFORMANCE CURVE PAGE E - 1...................................................
PARTS LISTS:
Pump Model PAGE E - 3..........................................................
Repair Rotating Assembly PAGE E - 5...............................................
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E - 6.........................
Back Cover And Wear Plate Removal PAGE E - 6.....................................
Suction Check Valve Removal PAGE E - 6...........................................
Rotating Assembly Removal PAGE E - 7.............................................
Impeller Removal PAGE E - 7......................................................
Seal Removal PAGE E - 8..........................................................
Shaft and Bearing Removal and Disassembly PAGE E - 8.............................
Shaft and Bearing Reassembly and Installation PAGE E - 9............................
Seal Installation PAGE E - 10........................................................
Impeller Installation PAGE E - 13.....................................................
Rotating Assembly Installation PAGE E - 13...........................................
Suction Check Valve Installation PAGE E - 14.........................................
Back Cover Installation PAGE E - 14.................................................
PRESSURE RELIEF VALVE MAINTENANCE PAGE E - 14..................................
Final Pump Assembly PAGE E - 14..................................................
LUBRICATION PAGE E - 15.............................................................
Seal Assembly PAGE E - 15.........................................................
Bearings PAGE E - 15..............................................................
Power Source PAGE E - 15.........................................................
ii
Page 5
T SERIES
OM-01046
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 Installation, Operation, and Mainte
nance manual is designed to help you achieve the
best performance and longest life from your Gor
man‐Rupp pump.
This pump is a T Series, semi‐open impeller, self‐
priming centrifugal model with a suction check
valve. The pump is designed for handling liquids
containing large entrained solids and slurries. The
basic material of construction is gray iron, with
ductile iron impeller and steel wearing parts.
Because pump installations are seldom identical,
this manual cannot possibly provide detailed in
structions and precautions for every aspect of
each specific application. Therefore, it is the re
sponsibility of the owner/installer of the pump to
ensure that applications not addressed in this
manual are performed only after establishing that
neither operator safety nor pump integrity are com
promised by the installation. Pumps and related
equipment must be installed and operated ac
cording to all national, local and industry stan
dards.
The following are used to alert maintenance per
sonnel to procedures which require special atten
tion, to those which could damage equipment, and
to those which could be dangerous to personnel:
Immediate hazards which WILL result in
severe personal injury or death. These
instructions describe the procedure re
quired and the injury which will result
from failure to follow the procedure.
Hazards or unsafe practices which
COULD result in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result from failure to follow
the procedure.
If there are any questions regarding the pump or
its application which are not covered in this man
ual or in other literature accompanying this unit,
please contact your Gorman‐Rupp distributor, or:
The Gorman‐Rupp Company
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
For information or technical assistance on the
power source, contact the power source manufac
turer's local dealer or representative.
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
T SERIES OM-01046
SAFETY - SECTION A
This information applies to T 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
operation.
Because pump installations are seldom
identical, this manual cannot possibly
provide detailed instructions and pre
cautions for each specific application.
Therefore, it is the owner/installer's re
sponsibility to ensure that applications
not addressed in this manual are per
formed only after establishing that nei
ther operator safety nor pump integrity
are compromised by the installation.
Before attempting to open or service the
pump:
containing large entrained solids or
slurries. Do not attempt to pump vola
tile, corrosive, or flammable materials
which may damage the pump or endan
ger personnel as a result of pump fail
ure.
After the pump has been positioned,
make certain that the pump and all pip
ing connections are tight, properly sup
ported and secure before operation.
Do not operate the pump without the
guards in place over the rotating parts.
Exposed rotating parts can catch cloth
ing, fingers, or tools, causing severe in
jury to personnel.
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 liquids
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 completely
cool before servicing.
Do not operate the pump against a
closed discharge valve for long periods
of time. If operated against a closed dis
charge valve, pump components will
deteriorate, and the liquid could come
to a boil, build pressure, and cause the
pump casing to rupture or explode.
PAGE A - 1SAFETY
Page 7
T SERIESOM-01046
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam
age to equipment. Suction and dis
charge hoses and piping must be re
moved from the pump before lifting.
Do not attempt to disengage any part of
an overheated pump unit. Vapor pres
sure within the pump casing can eject
these parts with great force when they
are disengaged. Allow the pump to
completely cool before servicing it.
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 injury. If overheating of the
pump occurs:
1. Stop the pump immediately.
2. Allow the pump to completely cool.
3. Refer to instructions in this manual
before restarting the pump.
PAGE A - 2 SAFETY
Page 8
INSTALLATION - SECTION B
OM-01046T SERIES
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 posi
tioned 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.
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 T6A3‐B, Including /F, /FM
PAGE B - 1INSTALLATION
Page 9
OM-01046 T 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 warnings and cautions con
tained in this manual or affixed to the pump,
and perform all duties indicated. Note the di
rection of rotation indicated on the pump.
Check that the pump shaft rotates counter
clockwise when facing the impeller.
POSITIONING PUMP
Lifting
Pump unit weights will vary depending on the
mounting and drive provided. Check the shipping
tag on the unit packaging for the actual weight, and
use lifting equipment with appropriate capacity.
Drain the pump and remove all customer‐installed
equipment such as suction and discharge hoses
or piping before attempting to lift existing, installed
units.
The pump assembly can be seriously
damaged if the cables or chains used to lift
and move the unit are improperly wrapped
around the pump.
Mounting
Only operate this pump in the direction in
dicated by the arrow on the pump body
and on the accompanying decal. 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 and power source have been
stored for more than 12 months, some of the
components or lubricants may have ex
ceeded their maximum shelf life. These must
be inspected or replaced to ensure maxi
mum pump service.
If the maximum shelf life has been exceeded, or if
anything appears to be abnormal, contact your
Gorman‐Rupp distributor or the factory to deter
mine the repair or updating policy. Do not put the
pump into service until appropriate action has
been taken.
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
When positioning the pump, allow a minimum
clearance of 18 inches (457 mm) in front of the
back cover to permit removal of the cover and easy
access to the pump interior.
SUCTION AND DISCHARGE PIPING
Pump performance is adversely effected by in
creased suction lift, discharge elevation, and fric
tion losses. See the performance curve and oper
ating range shown 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
PAGE B - 2 INSTALLATION
Page 10
OM-01046T SERIES
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.
Fittings
Suction lines should be the same size as the pump
inlet. If reducers are used in suction lines, they
should be the eccentric type, and should be in
stalled with the flat part of the reducers uppermost
to avoid creating air pockets. Valves are not nor
mally used in suction lines, but if a valve is used,
install it with the stem horizontal to avoid air pock
ets.
Strainers
If a strainer is furnished with the pump, be certain
to use it; any spherical solids which pass through a
strainer furnished with the pump will also pass
through the pump itself.
If a strainer is not furnished with the pump, but is
installed by the pump user, make certain that the
total area of the openings in the strainer is at least
three or four times the cross section of the suction
line, and that the openings will not permit passage
of solids larger than the solids handling capability
of the pump.
This pump is designed to handle up to 3‐inch (76,2
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.
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.
Since even a slight leak will affect priming, head,
and capacity, especially when operating with a
high suction lift, all connections in the suction line
should be sealed with pipe dope to ensure an air
tight seal. Follow the sealant manufacturer's rec
ommendations when selecting and applying the
pipe dope. The pipe dope should be compatible
with the liquid being pumped.
Suction Lines In Sumps
If a single suction line is installed in a sump, it
should be positioned away from the wall of the
sump at a distance equal to 1 1/2 times the diame
ter of the suction line.
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.
PAGE B - 3INSTALLATION
Page 11
OM-01046 T SERIES
If it is necessary to position inflow close to the suc
tion inlet, install a baffle between the inflow and the
suction inlet at a distance 1 1/2 times the diameter
of the suction pipe. The baffle will allow entrained
air to escape from the liquid before it is drawn into
the suction inlet.
If two suction lines are installed in a single sump,
the flow paths may interact, reducing the efficiency
of one or both pumps. To avoid this, position the
suction inlets so that they are separated by a dis
tance equal to at least 3 times the diameter of the
suction pipe.
Suction Line Positioning
The depth of submergence of the suction line is
critical to efficient pump operation.
recommended minimum submergence vs. veloc
ity.
Figure 2 shows
NOTE
The pipe submergence required may be reduced
by installing a standard pipe increaser fitting at the
end of the suction line. The larger opening size will
reduce the inlet velocity. Calculate the required
submergence using the following formula based
on the increased opening size (area or diameter).
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
DISCHARGE LINES
Siphoning
Do not terminate the discharge line at a level lower
than that of the liquid being pumped unless a si
phon breaker is used in the line. Otherwise, a si
phoning action causing damage to the pump
could result.
PAGE B - 4 INSTALLATION
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.
Page 12
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 in diameter to
minimize the chance of plugging.
OM-01046T SERIES
In high discharge head applications (more than
30 feet), an excessive amount of liquid may be by
passed and forced back to the wet well under the
full working pressure of the pump; this will reduce
overall pumping efficiency. Therefore, it is recom
mended that a Gorman‐Rupp Automatic Air Re
lease Valve be installed in the bypass line.
Gorman‐Rupp Automatic Air Release Valves are
reliable, and require minimum maintenance. See
AUTOMATIC AIR RELEASE VALVE 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.
If the installation involves a flooded suction such as
a below‐ground lift station. A pipe union and manu
al shut‐off valve may be installed in the bleed line to
allow service of the valve without shutting down the
station, and to eliminate the possibility of flooding.
If a manual shut‐off valve is installed anywhere in
the air release piping, it must be a full‐opening ball
type valve to prevent plugging by solids.
In low discharge head applications (less than 30
feet or 9 meters), it is recommended that the by
pass 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
line may be terminated with a six‐to‐eight foot
length of 1 1/4 inch 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 a manual shut‐off valve is installed in
a bypass line, it must not be left closed
during operation. A closed manual shut‐
off valve may cause a pump which has
lost prime to continue to operate with
out reaching prime, causing dangerous
overheating and possible explosive
rupture of the pump casing. Personnel
could be severely injured.
Allow an over‐heated pump to cool be
fore servicing. Do not remove plates,
covers, gauges, or fittings from an over‐
heated pump. Liquid within the pump
can reach boiling temperatures, and va
por pressure within the pump can cause
parts being disengaged to be ejected
with great force. After the pump cools,
drain the liquid from the pump by re
moving the casing drain plug. Use cau
PAGE B - 5INSTALLATION
Page 13
OM-01046 T SERIES
tion when removing the plug to prevent
injury to personnel 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
CLEAN‐OUT
COVER
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
90 LONG
RADIUS
ELBOW
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.
DISCHARGE PIPE
DISCHARGE
CHECK VALVE
SUPPORT
BRACKET
BLEED LINE 1”
(25,4 MM) DIA. MIN.
(CUSTOMER FUR
NISHED) EXTEND 6”
(152 MM) BELOW
PUMP OFF LIQUID
LEVEL
SUCTION
LINE
WET WELL
OR SUMP
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
PUMP DISCHARGE
SELF‐PRIMING
CENTRIFUGAL
PUMP
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.
PAGE B - 6 INSTALLATION
Page 14
OM-01046T SERIES
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.
The coupling is in alignment when the hub ends
are the same distance apart at all points (see Fig
ure 4A).
Figure 4A. Aligning Spider‐Type Couplings
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.
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. The coupling is in alignment when the
hubs are the same distance apart at all points (see
Figure 4B).
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.
PAGE B - 7INSTALLATION
Page 15
OM-01046 T SERIES
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.
DRIVE BELT TENSIONING
MISALIGNED:
SHAFTS
NOT PARALLEL
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.
MISALIGNED:
SHAFTS
NOT IN LINE
ALIGNED: SHAFTS
PARALLEL AND
SHEAVES IN LINE
General Rules of Tensioning
For new drive belts, check the tension after 5, 20
and 50 hours of operation and re‐tension as re
quired (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 drive belt tension is the lowest tension at
which the belt will not slip under peak load condi
tions. Do not over‐tension drive belts. Over‐ten
sioning will shorten both drive belt and bearing life.
Under‐tensioning will cause belt slippage. Always
keep belts free from dirt, grease, oil and other for
eign material which may cause slippage.
PAGE B - 8 INSTALLATION
Page 16
T SERIES
OM-01046
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and de
cals attached to the pump.
This pump is designed to handle liquids
containing large entrained solids and
slurries. Do not attempt to pump vola
tile, corrosive, or flammable liquids
which may damage the pump or endan
ger personnel as a result of pump fail
ure.
Pump speed and operating conditions
must be within the performance range
shown on page E‐1.
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.
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
under pressure could cause injury to
personnel.
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.
STARTING
Consult the operations manual furnished with the
power source.
Rotation
The correct direction of pump rotation is counter
clockwise when facing the impeller. The pump
could be damaged and performance adversely af
fected by incorrect rotation. If pump performance
is not within the specified limits (see the curve on
page E‐1), check the direction of power source ro
tation before further troubleshooting.
If an electric motor is used to drive the pump, re
move V‐belts, couplings, or otherwise disconnect
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
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.
Page 17
T SERIESOM-01046
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 liter
ature supplied with the motor for specific instruc
tions.
OPERATION
Lines With a Bypass
If a Gorman‐Rupp Automatic Air Release Valve has
been installed, the valve will automatically open to
allow the pump to prime, and automatically close
after priming is complete (see INSTALLATION for
Air Release Valve operation).
If the bypass line is open, air from the suction line
will be discharged through the bypass line back to
the wet well during the priming cycle. 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.
pump components will deteriorate, and
the liquid could come to a boil, build
pressure, and cause the pump casing to
rupture or explode.
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 operat
ing temperature.
Overheating can occur if operated with the valves
in the suction or discharge lines closed. Operating
against closed valves could bring the liquid to a
boil, build pressure, and cause the pump to rup
ture or explode. If overheating occurs, stop the
pump and allow it to cool before servicing it. Refill
the pump casing with cool liquid.
Allow an over‐heated pump to cool be
fore servicing. Do not remove plates,
covers, gauges, or fittings from an over‐
heated pump. Liquid within the pump
can reach boiling temperatures, and va
por pressure within the pump can cause
parts being disengaged to be ejected
with great force. After the pump cools,
drain the liquid from the pump by re
moving the casing drain plug. Use cau
tion when removing the plug to prevent
injury to personnel from hot liquid.
Do not operate the pump against a
closed discharge throttling valve for
long periods of time. If operated against
a closed discharge throttling valve,
As a safeguard against rupture or explosion due to
heat, this pump is equipped with a pressure relief
valve which will open if vapor pressure within the
pump casing reaches a critical point. If overheating
does occur, stop the pump immediately and allow
it to cool before servicing it. Approach any over
heated pump cautiously. It is recommended that
OPERATIONPAGE C - 2
Page 18
T SERIES
OM-01046
the pressure relief valve assembly be replaced at
each overhaul, or any time the pump casing over
heats and activates the valve. Never replace this
valve with a substitute which has not been speci
fied or provided by the Gorman‐Rupp Company.
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.
Pump Vacuum Check
shock waves can be transmitted to the pump and
piping system. Close all connecting valves slowly.
On engine driven pumps, reduce the throttle
speed slowly and allow the engine to idle briefly be
fore stopping.
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.
Do not operate the pump against a
closed discharge throttling valve for
long periods of time. If operated against
a closed discharge throttling valve,
pump components will deteriorate, and
the liquid could come to a boil, build
pressure, and cause the pump casing to
rupture or explode.
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
Cold Weather Preservation
In below freezing conditions, drain the pump to
prevent damage from freezing. Also, clean out any
solids by flushing with a hose. Operate the pump
for approximately one minute; this will remove any
remaining liquid that could freeze the pump rotat
ing parts. If the pump will be idle for more than a
few hours, or if it has been pumping liquids con
taining a large amount of solids, drain the pump,
and flush it thoroughly with clean water. To prevent
large solids from clogging the drain port and pre
venting the pump from completely draining, insert
a rod or stiff wire in the drain port, and agitate the
liquid during the draining process. Clean out any
remaining solids by flushing with a hose.
BEARING TEMPERATURE CHECK
Bearings normally run at higher than ambient tem
peratures because of heat generated by friction.
OPERATION PAGE C - 3
Page 19
T SERIESOM-01046
Temperatures up to 160F (71 C) are considered
normal for bearings, and they can operate safely to
at least 180F (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 temperature 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 MAINTENANCE
AND REPAIR). Bearing overheating can also be
caused by shaft misalignment and/or excessive vi
bration.
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.
OPERATIONPAGE C - 4
Page 20
T SERIES OM-01046
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Lock out or disconnect the power
source to ensure that the pump will
remain inoperative.
3. Allow the pump to completely cool if
overheated.
4. Check the temperature before open
ing any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
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 PRIM
ING.
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
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.
TROUBLESHOOTING PAGE D - 1
Page 21
OM-01046
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
T SERIES
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
PUMP REQUIRES
TOO MUCH
POWER
Strainer clogged. Check strainer and clean if neces
sary.
Suction intake not submerged at
proper level or sump too small.
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.
Check installation and correct sub
mergence as needed.
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.
Liquid solution too thick. Dilute if possible.
Bearing(s) frozen. Disassemble pump and check
PUMP CLOGS
FREQUENTLY
EXCESSIVE NOISE Cavitation in pump.
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.
Pumping entrained air.
Pump or drive not securely mounted.
bearing(s).
crease flow rate, and run power
source at maximum governed
speed.
Clean valve.
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.
Impeller clogged or damaged.
Clean out debris; replace dam
aged parts.
TROUBLESHOOTINGPAGE D - 2
Page 22
T SERIES OM-01046
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
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.
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
Check bearing temperature regu
larly to monitor any increase.
lubricant.
Check piping installation for
proper support.
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.
TROUBLESHOOTING PAGE D - 3
Page 23
OM-01046
T SERIES
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.
TROUBLESHOOTINGPAGE D - 4
Page 24
T SERIES
OM-01046
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 T6A3‐B, Including /F, /FM
Based on 70 F (21 C) clear water at sea level
with minimum suction lift. Since pump installations
are seldom identical, your performance may be dif
ference due to such factors as viscosity, specific
gravity, elevation, temperature, and impeller trim.
Contact the Gorman‐Rupp Company to verify per
formance or part numbers.
Pump speed and operating condition
If your pump serial number is followed by an “N”,
your pump is NOT a standard production model.
MAINTENANCE & REPAIR PAGE E - 1
points must be within the continuous per
formance range shown on the curve.
Page 25
OM-01046 T SERIES
SECTION DRAWING
PARTS PAGE
TOP VIEW
Figure 1. Pump Model T6A3-B, Including /F, /FM
MAINTENANCE & REPAIRPAGE E - 2
Page 26
T SERIES
OM-01046
PARTS LIST
Pump Model T6A3-B, Including /F, /FM
(From S/N 740693 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 REPAIR ROTATING ASSY 10956F --- 1
REPAIR ROTATING ASSY 44163-243 --- 1
(WW MODEL ONLY)
REPAIR ROTATING ASSY 44163-202 --- 1
(WWS MODEL ONLY)
3 PIPE PLUG P04 15079 1
4 HEX HD CAPSCREW B1208 15991 8
5 LOCKWASHER J12 15991 8
6 DISCHARGE FLANGE 1758 10010 1
7 DISCH FLANGE GSKT 25113-036 --- 1
8 ROTATING ASSY O‐RING S1676 --- 1
9 HEX HD CAPSCREW B0806 15991 4
10 LOCKWASHER J08 15991 4
11 ROT ASSY SHIM SET 13131 17040 4
12 WEAR PLATE ASSY 46451-723 24150 1
13 LOCKWASHER J06 15991 4
14 HEX NUT D06 15991 4
15 BACK COVER O‐RING S1676 --- 1
16 CASING DRAIN PLUG P20 10009 1
17 BACK CVR PLATE ASSY 42111-905 --- 1
18 -DRIVE SCREW BM#04-03 17000 4
19 -WARNING PLATE 2613EV 13990 1
20 -PRESS RELIEF VALVE 26662-005 --- 1
21 -BACK COVER PLATE NOT AVAILABLE 1
22 -WARNING DECAL 38816-302 --- 1
23 STUD C1211 15991 2
24 BACK COVER NUT 31871-073 15000 2
25 GASKET 11402G 19370 1
26 HEX HD CAPSCREW B1211 15991 8
27 LOCKWASHER J12 15991 8
28 PIPE PLUG P04 15079 1
29 SUCT CHK VALVE ASSY 46411-064 --- 1
30 SUCTION FLANGE 11402 10010 1
31 CHECK VALVE PIN 11645 17010 1
32 CLAMP BAR SCREW 31912-009 15000 1
33 PIPE PLUG P04 15079 1
34 CLAMP BAR 38111-004 11010 1
35 MACHINE BOLT A1014 15991 2
36 FILL COVER ASSY 42111-344 --- 1
37 -DRIVE SCREW BM#04-03 17000 2
38 -FILL COVER PLATE NOT AVAILABLE 1
39 -WARNING PLATE 38816-097 13990 1
40 -GASKET 50G 19210 1
NOT SHOWN:
NAME PLATE 38818-040 13990 1
DRIVE SCREW BM#04-03 17000 4
LUBE DECAL 11421 --- 1
SUCTION STICKER 6588AG --- 1
DISCHARGE STICKER 6588BJ --- 1
PRIMING STICKER 6588AH --- 1
WARNING DECAL 2613FE --- 1
ROTATON DECAL 2613M --- 1
OPTIONAL:
DISASSEMBLY TOOL 48711-020 --- 1
/F FLANGE KIT 48213-041 --- 1
-SUCTION 11402A 10010 1
-DISCHARGE 11402B 10010 1
/FM METRIC FLANGE KIT 48213-078 --- 1
-SUCTION 38642-502 10000 1
-DISCHARGE 38642-503 10000 1
WEAR PLATES:
-SPA ALLOY 46451-729 24160 1
-TUNGSTEN CARBIDE 46451-726 2415D 1
-STAINLESS STEEL 46451-723 1718H 1
CASING HEATERS:
-120V 47811-004 --- 1
-240V 47811-005 --- 1
CHECK VALVE ASSYS:
-NEO SOLID TYPE 46411-019 --- 1
-VITON SOLID 46411-078 --- 1
-VITON BLOW-OUT 46411-088 --- 1
PRESS RELIEF VALVES:
-SEWAGE TYPE 46431-628 --- 1
-STAINLESS STEEL 46431-629 --- 1
HI TEMP SHUT-DOWN KITS:
-145F 48313-186 --- 1
-130F 48313-256 --- 1
-120F 48313-257 --- 1
HI TEMP SHUT-DOWN 48313-172 --- 1
THERMOSTAT KIT 145F
AIR RELEASE VALVES:
-10# COMP SPRING GRP33-07A --- 1
-25# COMP SPRING GRP33-07 --- 1
-80# COMP SPRING GRP33-07B --- 1
A/R VALVE MTG KIT 46331-515 --- 1
ROTATING ASSY AND BACK COVER O‐RING
-VITON 25154-454 --- 1
INDICATES PARTS RECOMMENDED FOR STOCK
INCLUDED WITH REPAIR PUMP CASING ASSY 46472-708---1
KALREZ AND VITON ARE PRODUCTS OF THE DUPONT CORP
AFLAS IS A PRODUCT OF THE 3M CORP
MAINTENANCE & REPAIR PAGE E - 3
Page 27
OM-01046 T SERIES
SECTION DRAWING
Figure 2. 10956F Repair Rotating Assembly
MAINTENANCE & REPAIRPAGE E - 4
Page 28
T SERIES
ITEM
PART NAME PART
NO.
PARTS LIST
10956F Repair Rotating Assembly
NUMBER
MAT'L
CODE
QTY ITEM
NO.
PART NAME PART
NUMBER
OM-01046
MAT'L
CODE
QTY
1 IMPELLER 10958 11010 1
2 SEAL ASSEMBLY 46513-150 --- 1
3 SEAL PLATE 11837E 10010 1
4 SEAL PLATE GASKET 10959G 20000 1
5 BEARING CAP OIL SEAL S1352 --- 1
6 INBOARD BALL BEARING 23276-009 --- 1
7 BEARING HOUSING 10959B 10010 1
8 VENTED PLUG 4823A 15079 1
9 AIR VENT S1530 --- 1
10 RED PIPE BUSHING AP0802 15079 1
11 BEARING CAP GASKET 38683-248 18000 1
12 BEARING CAP 38322-215 10010 1
13 HEX HD CAPSCREW B0605 15991 4
14 LOCKWASHER J06 15991 4
15 BRG RETAINING RING S244 --- 1
16 SHAFT KEY N0612 15990 1
17 IMPELLER SHAFT 10529 16040 1
18 INBOARD OIL SEAL S1352 --- 1
19 OUTBRD BALL BEARING S1040 --- 1
20 HEX HD CAPSCREW B0805 1/2 15991 4
21 LOCKWASHER J08 15991 4
22 IMPELLER WASHER 10278 15030 1
23 SOCKET HD CAPSCREW DM1004S 15991 1
24 SIGHT GAUGE S1471 --- 1
25 SEAL CAV DRAIN PLUG P08 15079 1
26 BRG HSG DRAIN PLUG P08 15079 1
27 PIPE PLUG P12 15079 1
28 O‐RING 25154-022 --- REF
29 IMPELLER ADJ SHIM SET 37J 17090 REF
30 ROTATING ASSY O‐RING S1676 --- 1
31 SHIPPING PLUG 11495B 15079 1
32 SHIPPING PLUG 11495B 15079 1
33 ROT ASSY ADJ SHIM SET 13131 17040 4
INSTRUCTION TAG 6588U --- 1
OPTIONAL:
IMP CLEAN‐OUT KIT 48783-003 --- 1
STAINLESS STEEL PARTS:
IMP SHAFT LESS SLEEVE 10529B 1706H 1
SPACER WASHER
(FOR SST SHAFT) 38329-040 17130 1
SEAL ASSY 112364D --- 1
IMPELLERS:
-ADI 10958 1102H 1
-TUNG CARB COATED 10958A 11000 1
SEAL PLATES:
-(TUNG CARB COATED) 11837F 10010 1
-ADI 11837E 1102H 1
SEAL ASSEMBLIES
-STD MECHANICAL 12364A --- 1
-PERMALON COATED 46512-150 --- 1
METAL BELLOWS MECH SEAL ASSY
SEAL PLATE 38272-242 10010 1
SEAL SLEEVE ASTL 11876B 16000 1
SPACER WASHER 38329-040 17130 1
-(VITON OR EQUAL) 46512-147 --- 1
-(KALREZ) 46512-142 --- 1
MECHANICAL SEAL
SHAFT SLEEVE 11876A 16000 1
AFLAS SEAL (W/SST SLEEVE
OR SOLID SST SHAFT) 46512-194 --- 1
NOT SHOWN:
ROTATION DECAL 2613M --- 1
INDICATES PARTS RECOMMENDED FOR STOCK
FOR PUMPS WITH SERIAL NUMBERS BELOW 864836, ORDER 10530G/18000 BEARING CAP GASKET.
IF BOTH BEARING CAP AND GASKET MUST BE REPLACED, ORDER PARTS LISTED ABOVE.
OPTIONAL MECHANICAL SEAL(S) MUST BE USED WITH MECHANICAL SEAL SHAFT SLEEVE OR SOLID SST SHAFT.
KALREZ AND VITON ARE PRODUCTS OF THE DUPONT CORP.
AFLAS IS A PRODUCT OF THE 3M CORP.
ROTATING ASSEMBLY AND BACK COVER O‐RINGS:
-VITON 25154-454 --- 1
MAINTENANCE & REPAIR PAGE E - 5
Page 29
OM-01046 T SERIES
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY
Review all SAFETY information in Section A.
Follow the instructions on all tags, label and decals
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 views (see Figures 1 and 2) and the
accompanying parts lists.
As described on the following pages, this manual
will alert personnel to known procedures which re
quire special attention, to those which could dam
age equipment, and to those which could be dan
gerous to personnel. However, this manual cannot
possibly anticipate and provide detailed precau
tions for every situation that might occur during
maintenance of the unit. Therefore, it is the respon
sibility of the owner/maintenance personnel to en
sure that only safe, established maintenance pro
cedures are used, and that any procedures not ad
dressed in this manual are performed only after es
tablishing that neither personal safety nor pump in
tegrity are compromised by such practices.
Many service functions may be performed by
draining the pump and removing the back cover
assembly. If major repair is required, the piping
and/or power source must be disconnected. The
following instructions assume complete disassem
bly is required.
Before attempting to service the pump, disconnect
or lock out the power source and take precautions
to ensure that it will remain inoperative. Close all
valves in the suction and discharge lines.
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.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam
age to equipment.
Back Cover And Wear Plate Removal
(Figure 1)
The wear plate (12) is easily accessible and may be
serviced by removing the back cover assembly
(17). Before attempting to service the pump, re
move the pump casing drain plug (16) and drain
the pump. Clean and reinstall the drain plug.
Remove the back cover nuts (24) and pull the back
cover and assembled wear plate from the pump
casing (1). Inspect the wear plate, and replace it if
badly scored or worn. To remove the wear plate,
disengage the hardware (13 and 14).
Inspect the back cover O‐ring (15) and replace it if
damaged or worn.
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.
Suction Check Valve Removal
(Figure 1)
If the check valve assembly (29) is to be serviced,
remove the check valve pin (31), reach through the
back cover opening and pull the complete assem
bly from the suction flange (30).
NOTE
Further disassembly of the check valve is not re
quired since it must be replaced as a complete unit.
MAINTENANCE & REPAIRPAGE E - 6
Page 30
T SERIES
OM-01046
Individual parts are not sold separately.
Rotating Assembly Removal
(Figure 2)
The rotating assembly may be serviced without
disconnecting the suction or discharge piping;
however, the power source must be removed to
provide clearance.
The impeller (1) should be loosened while the rotat
ing assembly is still secured to the pump casing.
Before loosening the impeller, remove the seal cav
ity drain plug (25) and drain the seal lubricant. This
will prevent the oil in the seal cavity from escaping
when the impeller is loosened. Clean and reinstall
the seal cavity drain plug.
Immobilize the impeller by wedging a block wood
between the vanes and the pump casing, and re
move the impeller capscrew and washer (22 and
23).
way. When the impeller breaks loose, remove the
lathe dog and wood block.
NOTE
Do not remove the impeller until the rotating assem
bly has been removed from the pump casing.
(Figure 1)
Remove the hardware (9 and 10) securing the ro
tating assembly to the pump casing. Separate the
rotating assembly by pulling straight away from the
pump casing.
NOTE
An optional disassembly tool is available from the
factory. If the tool is used, follow the instructions
packed with it. A similar tool may be assembled us
ing 1/2‐inch pipe (schedule 80 steel or malleable
iron) and a standard tee (see Figure 4). All threads
are 1/2‐inch NPT. Do not pre‐assemble the tool.
Install a lathe dog on the drive end of the shaft (17)
with the “V” notch positioned over the shaft key
way.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Heavy
Bar Stock
Figure 3. Loosening Impeller
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
TEE
APPROX. 6 IN.
(152 MM) LONG
APPROX. 14 IN.
(356 MM) LONG
Figure 4. Rotating Assembly Tool
To install the tool, remove the air vent (9, Figure 2)
from the bearing housing, and screw the longest
length of pipe into the vent hole until fully engaged.
Install the tee, and screw the handles into the tee.
Use caution when lifting the rotating assembly to
avoid injury to personnel or damage to the assem
bly.
Remove the bearing housing O‐ring (8).
With the impeller rotation still blocked, see Figure 3
and use a long piece of heavy bar stock to pry
against the arm of the lathe dog in a counterclock
wise direction (when facing the drive end of the
shaft). Use caution not to damage the shaft or key
MAINTENANCE & REPAIR PAGE E - 7
Impeller Removal
(Figure 2)
With the rotating assembly removed from the
pump casing, unscrew the impeller from the shaft.
Page 31
OM-01046 T SERIES
Use caution when unscrewing the impeller; ten
sion on the shaft seal spring will be released as the
impeller is removed. Inspect the impeller and re
place if cracked or badly worn.
Remove the impeller adjusting shims (29); tie and
tag the shims, or measure and record their thick
ness for ease of reassembly.
Seal Removal
(Figure 2)
Slide the integral shaft sleeve and rotating portion
of the seal off the shaft as a unit.
Use a pair of stiff wires with hooked ends to remove
the stationary element and seat.
An alternate method of removing the stationary
seal components is to remove the hardware (20
and 21) and separate the seal plate (3) and gasket
(4) from the bearing housing (7). Position the seal
plate on a flat surface with the impeller side down.
Use a wooden dowel or other suitable tool to press
on the back side of the stationary seat until the
seat, O‐rings, and stationary element can be re
moved.
Disengage the hardware (13 and14) and slide the
bearing cap (12) and oil seal (18) off the shaft.Re
move the bearing cap gasket (11), and press the oil
seal from the bearing cap.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bear
ings (6 and 19) from the bearing housing.
After removing the shaft and bearings, clean and
inspect the bearings in place as follows.
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 bearing housing, shaft and all compo
nent parts (except the bearings) with a soft cloth
soaked in cleaning solvent. Inspect the parts for
wear or damage and replace as necessary.
Remove the shaft sleeve O‐ring (28).
If no further disassembly is required, refer to Seal
Installation.
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and main
tained, the bearing housing should not require dis
assembly. 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 bearing housing drain plug (26) and
drain the lubricant. Clean and reinstall the drain
plug.
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.
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
MAINTENANCE & REPAIRPAGE E - 8
Page 32
T SERIES
OM-01046
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 bearing
housing. Replace the bearings, shaft, or bearing
housing if the proper bearing fit is not achieved.
If bearing replacement is required, remove the out
board bearing retaining ring (15), and use a bear
ing puller to remove the bearings from the shaft.
Press the inboard oil seal (5) from the bearing
housing.
Shaft and Bearing Reassembly and Installation
(Figure 2)
Clean the bearing housing, shaft and all compo
nent parts (except the bearings) with a soft cloth
soaked in cleaning solvent. Inspect the parts for
wear or damage 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.
be replaced any time the shaft and bear
ings are removed.
NOTE
Position the inboard bearing (6) on the shaft with
the shielded side toward the impeller end of the
shaft. Position the outboard bearing (19) on the
shaft with the integral retaining ring on the bearing
O.D. toward the drive end of the shaft.
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 250F (120C), and slide the bearings
onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con
tinuous motion, to prevent the bearings from cool
ing and sticking on the shaft.
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 suitable sized
sleeve and a press to reposition the bearings
against the shaft shoulders.
If heating the bearings is not practical, use a suit
able sized sleeve, and an arbor (or hydraulic) press
to install the bearings on the shaft.
Position the inboard oil seal (5) in the bearing hous
ing bore with the lip positioned as shown in Figure
2. Press the oil seal into the housing until the face is
just flush with the machined surface on the hous
ing.
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.
Secure the outboard bearing on the shaft with the
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
MAINTENANCE & REPAIR PAGE E - 9
bearing retaining ring (15).
Slide the shaft and assembled bearings into the
bearing housing until the retaining ring on the out
board bearing seats against the bearing housing.
Page 33
OM-01046 T SERIES
flammable. Use them only in a well ven
tilated area free from excessive heat,
sparks, and flame. Read and follow all
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Press the outboard oil seal (18) into the bearing
cap (12) with the lip positioned as shown in Figure
2. Replace the bearing cap gasket (11), and secure
the bearing cap with the hardware (13 and 14). Be
careful not to damage the oil seal lip on the shaft
keyway.
Install the bearing housing O‐ring (30).
precautions printed on solvent contain
ers.
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary
seat bore in the seal plate for dirt, nicks and burrs,
and remove any that exist. The stationary seat bore
must be completely clean before installing the
seal.
Lubricate the bearing housing as indicated in LU
BRICATION.
Seal Installation
(Figures 2, 5, 6 and 7)
Most cleaning solvents are toxic and
A new seal assembly should be installed
any time the old seal is removed from the
pump. Wear patterns on the finished faces
cannot be realigned during reassembly.
Reusing an old seal could result in prema
ture failure.
To ease installation of the seal, lubricate the shaft
sleeve O‐ring and the external stationary seat O‐
ring with a very small amount of light lubricating oil.
See Figure 5 for seal part identification.
MAINTENANCE & REPAIRPAGE E - 10
Page 34
T SERIES
OM-01046
SPRING
IMPELLER
IMPELLER
SHIMS
IMPELLER
SHAFT
BELLOWS
SPRING
CENTERING
WASHER
RETAINER
DRIVE BAND
ROTATING
ELEMENT
STATIONARY
ELEMENT
SEAL PLATE
O‐RINGS
SLEEVE
O‐RING
INTEGRAL
SHAFT
SLEEVE
SHEAR
RING
(SHEARED)
STATIONARY
SEAT
Figure 5. 46513-150 Cartridge Seal Assembly
This seal is not designed for operation at
temperatures above 160F (71C). Do not
use at higher operating temperatures.
If the seal plate was removed, install the seal plate
gasket (4). Position the seal plate over the shaft
and secure it to the intermediate with the hardware
(20 and 21).
To prevent damaging the shaft sleeve O‐ring (28)
on the shaft threads, stretch the O‐ring over a piece
of tubing 1‐1/4 I.D. x 1‐1/2 O.D. x 2‐inches long (32
mm x 38 mm x 51 mm). Slide the tube over the shaft
threads, then slide the O‐ring off the tube and onto
the shaft. Remove the tube, and continue to slide
the O‐ring down the shaft until it seats against the
shaft shoulder.
New cartridge seal assemblies may be
equipped with mylar storage tabs between
the seal faces. If so equipped, these stor
age tabs must be removed before install
ing the seal.
Lubricate the external stationary seat O‐ring with
light oil. Slide the seal assembly onto the shaft until
the external stationary seat O‐ring engages the
bore in the seal plate.
Clean and inspect the impeller as described in Im
peller Installation and Adjustment. Install the full
set of impeller shims (29) provided with the seal,
and screw the impeller onto the shaft until it is
seated against the seal (see Figure 6).
When installing a new cartridge seal assembly,
remove the seal from the container, and remove
the mylar storage tabs, if so equipped, from be
tween the seal faces.
MAINTENANCE & REPAIR PAGE E - 11
Continue to screw the impeller onto the shaft. This
will press the stationary seat into the seal plate
bore.
Page 35
OM-01046 T SERIES
O‐RING ENGAGED
WITH SEAL PLATE
BORE
SHEAR RING
(UNSHEARED)
Figure 6. Seal Partially Installed
NOTE
A firm resistance will be felt as the impeller presses
the stationary seat into the seal plate bore.
As the stationary seat becomes fully seated, the
seal spring compresses, and the shaft sleeve will
break the nylon shear ring. This allows the sleeve
to slide down the shaft until seated against the
shaft shoulder. Continue to screw the impeller onto
the shaft until the impeller, shims, and sleeve are
fully seated against the shaft shoulder (see Figure
7).
Measure the impeller‐to‐seal plate clearance, and
remove impeller adjusting shims to obtain the
proper clearance as described in Impeller Instal
lation and Adjustment.
If necessary to reuse an old seal in an emer
gency, carefully separate the rotating and station
ary seal faces from the bellows retainer and sta
tionary seat.
A new seal assembly should be installed
any time the old seal is removed from the
pump. Wear patterns on the finished faces
cannot be realigned during reassembly.
Reusing an old seal could result in prema
ture failure.
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.
Carefully wash all metallic parts in fresh cleaning
solvent and allow to dry thoroughly.
STATIONARY SEAT
FULLY SEATED IN
SEAL PLATE BORE
SHEAR RING
(SHEARED)
Figure 7. Seal Fully Installed
Do not attempt to separate the rotating
portion of the seal from the shaft sleeve
when reusing an old seal. The rubber bel
lows will adhere to the sleeve during use,
and attempting to separate them could
damage the bellows.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak
age. Inspect the integral shaft sleeve for nicks or
cuts on either end. If any components are worn, or
the sleeve is damaged, replace the complete seal;
never mix old and new seal parts.
Install the stationary seal element in the stationary
seat. Press this stationary subassembly into the
seal plate bore until it seats squarely against the
bore shoulder. A push tube made from a piece of
plastic pipe would aid this installation. The I.D. of
MAINTENANCE & REPAIRPAGE E - 12
Page 36
T SERIES
OM-01046
the pipe should be slightly larger than the O.D. of
the shaft sleeve.
Slide the rotating portion of the seal (consisting of
the integral shaft sleeve, spring centering washer,
spring, bellows and retainer, and rotating element)
onto the shaft until the seal faces contact.
Proceed with Impeller Installation and Adjust
ment.
Impeller Installation
(Figure 2)
Inspect the impeller, and replace it if cracked or
badly worn. Inspect the impeller and shaft threads
for dirt or damage, and clean or dress the threads
as required.
The shaft and impeller threads must be
completely clean before reinstalling the im
peller. Even the slightest amount of dirt on
the threads can cause the impeller to seize
to the shaft, making future removal difficult
or impossible without damage to the im
peller or shaft.
Install the same thickness of impeller adjusting
shims (29) as previously removed. Apply `Never‐
Seez' or equivalent to the shaft threads and screw
the impeller onto the shaft until tight.
NOTE
At the slightest sign of binding, immediately back
the impeller off, and check the threads for dirt. Do
not try to force the impeller onto the shaft.
A clearance of .025 to .040 inch (0,64 to 1,02 mm)
between the impeller and the seal plate is recom
mended for maximum pump efficiency. Measure
this clearance, and add or remove impeller adjust
ing shims as required.
NOTE
If the rotating assembly has been installed in the
pump casing, this clearance may be measured by
reaching through the priming port with a feeler
gauge.
NOTE
Proceed with Rotating Assembly Installation be
fore installing the impeller capscrew and washer
(22 and 23). The rotating assembly must be in
stalled in the pump casing in order to torque the im
peller capscrew.
After the rotating assembly is installed in the pump
casing, coat the threads of the impeller capscrew
(23) with `Never‐Seez' or equivalent compound,
and install the impeller washer (22) and capscrew;
torque the capscrew to 90 ft. lbs. (1080 in. lbs. or
12,4 m. kg.).
Rotating Assembly Installation
(Figure 1)
NOTE
If the pump has been completely disassembled, it
is recommended that the suction check valve and
back cover assembly be reinstalled at this point.
The back cover assembly must be in place to adjust
the impeller face clearance.
Install the bearing housing and lubricate it with light
grease. Ease the rotating assembly into the pump
casing using the installation tool. Be careful not to
damage the O‐ring.
Install the four sets of rotating assembly adjusting
shims (11) using the same thickness as previously
removed. Secure the rotating assembly to the
pump casing with the hardware (9 and 10). Do not
fully tighten the capscrews until the back cover has
been reinstalled and the impeller face clearance
has been set.
A clearance of .010 to .020 inch (0,25 to 0,51 mm)
between the impeller and the wear plate is also rec
ommended for maximum pump efficiency. This
clearance can be obtained by removing an equal
amount of shims from each rotating assembly
shim set until the impeller scrapes against the wear
plate when the shaft is turned. After the impeller
scrapes, add approximately .015 inch (0,4 mm) of
shims to each shim set.
NOTE
An alternate method of adjusting this clearance is to
MAINTENANCE & REPAIR PAGE E - 13
Page 37
OM-01046 T SERIES
reach through the suction port with a feeler gauge
and measure the gap. Add or subtract rotating as
sembly shims accordingly.
Suction Check Valve Installation
(Figure 1)
Inspect the check valve assembly (29), and re
place it if badly worn.
NOTE
The check valve assembly must be replaced as a
complete unit. Individual parts are not sold sepa
rately.
Reach through the back cover opening with the
check valve (29), and position the check valve
adaptor in the mounting slot in the suction flange
(30). Align the adaptor with the flange hole, and se
cure the assembly with the check valve pin (31).
NOTE
If the suction or discharge flanges were removed,
replace the respective gaskets, apply `Permatex
Aviation No. 3 Form‐A‐Gasket' or equivalent com
pound to the mating surfaces, and secure them to
the pump casing with the attaching hardware.
Back Cover Installation
surface which contacts the pump casing. This ac
tion will reduce rust and scale build‐up.
Secure the back cover assembly by tightening the
back cover nuts (24) evenly. Do not over‐tighten
the hand nuts; they should be just tight enough to
ensure a good seal at the back cover shoulder. Be
sure the wear plate does not bind against the cas
ing.
PRESSURE RELIEF VALVE
MAINTENANCE
(Figure 1)
The back cover is equipped with a pressure relief
valve (20) to provide additional safety for the pump
and operator (refer to Liquid Temperature And
Overheating in OPERATION).
It is recommended that the pressure relief valve as
sembly be replaced at each overhaul, or any time
the pump overheats and activates the valve. Never
replace this valve with a substitute which has not
been specified or provided by the Gorman‐Rupp
Company.
Periodically, the valve should be removed for in
spection and cleaning. When reinstalling the relief
valve, apply `Loctite Pipe Sealant With Teflon No.
592', or equivalent compound, on the relief valve
threads. Position the valve as shown in Figure 1
with the discharge port pointing down.
(Figure 1)
If the wear plate (12) was removed for replace
ment, carefully center it on the back cover and se
cure it with the hardware (13 and 14). The wear
plate must be concentric to prevent binding when
the back cover is installed.
Replace the back cover O‐ring (15), and lubricate it
with a generous amount of No. 2 grease. Clean any
scale or debris from the contacting surfaces in the
pump casing that might interfere or prevent a good
seal with the back cover. Slide the back cover as
sembly 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
Final Pump Assembly
(Figure 1)
Install the shaft key (16, Figure 2) and reconnect
the power source. Be sure to install any guards
used over the rotating members.
Do not operate the pump without the
guards in place over the rotating parts.
Exposed rotating parts can catch cloth
ing, fingers, or tools, causing severe in
jury to personnel.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
MAINTENANCE & REPAIRPAGE E - 14
Page 38
T SERIES
OM-01046
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.
Remove the fill cover assembly (36) and fill the
pump casing with clean liquid. Reinstall the fill
cover and tighten it. Refer to OPERATION, Section
C, before putting the pump back into service.
LUBRICATION
Seal Assembly
(Figure 2)
Before starting the pump, remove the vented plug
(8) and fill the seal cavity with approximately 40
ounces (1,4 liters) of SAE No. 30 non‐detergent oil,
or to a level just below the tapped vented plug hole.
Clean and reinstall the vented plug. Maintain the oil
at this level.
Bearings
(Figure 2)
The bearing housing was fully lubricated when
shipped from the factory. Check the oil level regu
larly through the sight gauge (24) and maintain it at
the middle of the gauge. When lubrication is re
quired, add SAE No. 30 non‐detergent oil through
the hole for the air vent (9). Do not over‐lubricate.
Over‐lubrication can cause the bearings to over‐
heat, resulting in premature bearing failure.
NOTE
The white reflector in the sight gauge must be posi
tioned horizontally to provide proper drainage.
Under normal conditions, drain the bearing hous
ing once each year and refill with approximately 32
ounces (1 liter) clean oil. Change the oil more fre
quently if the pump is operated continuously or in
stalled in an environment with rapid temperature
change.
Monitor the condition of the bearing lubri
cant regularly for evidence of rust or mois
ture condensation. This is especially im
portant in areas where variable hot and
cold temperatures are common.
For cold weather operation, consult the factory or a
lubricant supplier for the recommended grade of
oil.
Power Source
Consult the literature supplied with the power
source, or contact your local power source repre
sentative.
MAINTENANCE & REPAIR PAGE E - 15
Page 39
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 MANSFIELD, OHIO
GORMAN‐RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA
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