GORMAN-RUPP PUMPS T2C60SC-E3 Application guide

COM-07331-01
September 4, 2020
GORMAN‐RUPP PUMPS
www.grpumps.com
2020 Gorman‐Rupp Pumps Printed in U.S.A.
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
T SERIESPUMPS
MODELS
T2C60SC‐E3 ALL VOLTAGES
T2C60SC‐E10 3P & T2C60SC-E10 575/3
INCLUDING /F

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:

TABLE OF CONTENTS
i
INTRODUCTION PAGE I - 1.................................................
SAFETY - SECTION A PAGE A - 1...........................................
INSTALLATION - SECTION B PAGE B - 1....................................
Pump Dimensions PAGE B - 1.....................................................
PREINSTALLATION INSPECTION PAGE B - 1............................................
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 - 4...............................................................
Suction Lines In Sumps PAGE B - 4.................................................
Suction Line Positioning PAGE B - 4................................................
DISCHARGE LINES PAGE B - 5........................................................
Siphoning PAGE B - 5.............................................................
Valves PAGE B - 5................................................................
Bypass Lines PAGE B - 5..........................................................
AUTOMATIC AIR RELEASE VALVE PAGE B - 6...........................................
Theory of Operation PAGE B - 6....................................................
Air Release Valve Installation PAGE B - 7............................................
ELECTRICAL CONNECTIONS PAGE B - 7...............................................
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.........................................................
Clog Removal and Wear Plate Clearance PAGE C - 3.................................
Pump Vacuum Check PAGE C - 3..................................................
STOPPING PAGE C - 3................................................................
Cold Weather Preservation PAGE C - 3..............................................
BEARING TEMPERATURE CHECK PAGE C - 4..........................................

TABLE OF CONTENTS
(continued)
ii
TROUBLESHOOTING - SECTION D PAGE D - 1..............................
PREVENTIVE MAINTENANCE PAGE D - 3...........................................
PUMP MAINTENANCE AND REPAIR - SECTION E PAGE E - 1................
PERFORMANCE CURVE PAGE E - 1...................................................
PARTS LISTS:
Pump Models PAGE E - 3.........................................................
Repair Rotating Assemblies PAGE E - 5.............................................
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E - 6.........................
Back Cover And Wear Plate Removal PAGE E - 7.....................................
Suction Check Valve Removal PAGE E - 7...........................................
Rotating Assembly Removal PAGE E - 7.............................................
Impeller Removal PAGE E - 8......................................................
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 and Adjustment PAGE E - 12......................................
Rotating Assembly Installation PAGE E - 13...........................................
Suction Check Valve Installation PAGE E - 13.........................................
Back Cover Installation PAGE E - 13.................................................
PRESSURE RELIEF VALVE MAINTENANCE PAGE E - 14..................................
Final Pump Assembly PAGE E - 14..................................................
LUBRICATION PAGE E - 14.............................................................
Seal Assembly PAGE E - 14.........................................................
Bearings PAGE E - 14..............................................................
Motor PAGE E - 14.................................................................

SUPER T SERIES OM-07331
PAGE I - 1INTRODUCTION
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.
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.
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: [phone]
or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: [phone]
For information or technical assistance on the
power source, contact the power source manufac
turer's local dealer or representative.
HAZARD AND INSTRUCTION
DEFINITIONS
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.
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.

SUPER T SERIES OM-07331
PAGE A - 1SAFETY
SAFETY - SECTION A
This information applies to T Seriesr
electric motor driven pumps. Refer to
the manual accompanying the motor
before attempting to begin operation.
This manual will alert personnel to
known procedures which require spe
cial attention, to those which could
damage equipment, and to those which
could be dangerous to personnel. How
ever, this manual cannot possibly pro
vide detailed instructions and precau
tions for each specific application or for
every situation that might occur during
maintenance of the unit. Therefore, it is
the responsibility of the owner, installer
and/or maintenance personnel to en
sure that applications and/or mainte
nance procedures not addressed in this
manual are performed only after estab
lishing that neither personal safety nor
pump integrity are compromised by
such applications or procedures.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man
ual.
2. Disconnect the incoming power to
the motor and lock it out to ensure
that the pump will remain inopera
tive.
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
containing entrained solids or slurries.
Do not attempt to pump volatile, corro
sive, or flammable materials which may
damage the pump or endanger person
nel as a result of pump failure.
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 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 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.
Do not install and operate a non‐explo
sion proof motor in an explosive atmo
sphere. Install, connect, and operate
the motor in accordance with the Na
tional Electric Code and all local codes.

SUPER T SERIESOM-07331
PAGE A - 2 SAFETY
If there is a conflict between the instruc
tions in the manual accompanying the
unit and the National Electric Code or
the applicable local code, the National
or local code shall take precedence.
The electrical power used to operate
this pump is high enough to cause inju
ry or death. Obtain the services of a qu
alified electrician to troubleshoot, test
and/or service the electrical compo
nents of this 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.
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.

OM-07331SUPER T SERIES
PAGE B - 1INSTALLATION
INSTALLATION - SECTION B
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this
section offers only general recommendations and
practices required to inspect, position, and ar
range the pump and piping.
Most of the information pertains to a standard
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
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.
OUTLINE DRAWING
NOTE: OPTIONAL ASA SUCTION & DISCHARGE SPOOL FLANGES AVAILABLE
DISCHARGE:
2.00−11.5 NPT
SUCTION:
2.00−11.5 NPT
.56/[14,2] DIA
4 HOLES
7.50
[ 190,5 ]
3.75
[ 95,2 ]
1.75
[ 44,4 ]
17.79
[ 451,8 ]
16.75
[ 425,4 ]
13.50
[ 342,9 ]
11.61
[ 294,8 ]
5.80
[ 147,4 ]
12.75
[ 323,8 ]
6.00
[ 152,4 ]
6.41
[ 162,7 ]
2.00
[ 50,8 ]
7.53
[ 191,2 ]
5.50
[ 139,7 ]
1.57
[ 39,8 ]
13.25
[ 336,6 ]
7.19
[ 182,6 ]
.41
[ 10,3 ] DIA 6 HOLES
18.00/[457,2] RECOMMENDED FOR
REMOVAL OF BACK COVER PLATE
8.50/[215,9] REQUIRED FOR
REMOVAL OF BACK COVER PLATE
*
*
.69
[ 17,5 ]
4.50
[ 114,3 ]
DIMENSIONS:
INCHES
[MILLIMETERS]
Figure 1. Pump Models T2C60SC-E3 1P All Voltages & T2C60SC-E10 3P & 575/3
Including /F Models
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:

OM-07331 SUPER T SERIES
PAGE B - 2 INSTALLATION
a. Inspect the pump and motor 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.
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 motor have been stored for
more than 12 months, some of the compo
nents or lubricants may have exceeded their
maximum shelf life. These must be inspected
or replaced to ensure maximum pump serv
ice.
If the maximum shelf life has been exceeded, or if
anything appears to be abnormal, contact your
Gorman‐Rupp distributor or the factory to deter
mine the repair or updating policy. Do not put the
pump into service until appropriate action has
been taken.
The electrical power used to operate
this pump is high enough to cause inju
ry or death. Obtain the services of a qu
alified electrician to troubleshoot, test
and/or service the electrical compo
nents of this pump.
POSITIONING PUMP
Lifting
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.
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 casing is equipped with mounting foot
holes and the motor is equipped with adjustable
leveling feet. When mounting the pump, secure the
casing feet to the base and then extend the motor
mounting feet to the surface of the base to support
the motor and eliminate vibration. Do not over‐ex
tend the mounting feet; over‐extension of the
mounting feet can cause distortion of the motor
shaft and/or shaft extension, resulting in damage
to the pump and/or motor. When the mounting feet

OM-07331SUPER T SERIES
PAGE B - 3INSTALLATION
are fully extended to the surface of the base, lock
the mounting feet in place with the mounting feet
jam nuts.
Clearance
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 8.5 inches
(215,9 mm) must be maintained to permit removal
of the cover.
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
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.
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.
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
A strainer or other device should be used to filter
solids larger than the pump's capacity to avoid
damage or decreased performance. Information
about solids size handling can be found on the per
formance curve for your specific pump. When se
lecting or installing a strainer, 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 the openings will not permit passage of

OM-07331 SUPER T SERIES
PAGE B - 4 INSTALLATION
solids larger than the solids handling capability of
the pump.
Sealing
Since even a slight leak will affect priming, head,
and capacity, especially when operating with a
high suction lift, all connections in the suction line
should be sealed with pipe dope to ensure an air
tight seal. Follow the sealant manufacturer's rec
ommendations when selecting and applying the
pipe dope. The pipe dope should be compatible
with the liquid being pumped.
Suction Lines In Sumps
If a single suction line is installed in a sump, it
should be positioned away from the wall of the
sump at a distance equal to 1 1/2 times the diame
ter of the suction line.
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. Figure 2 shows
recommended minimum submergence vs. veloc
ity.
NOTE
The pipe submergence required may be reduced
by installing a standard pipe increaser fitting at the
end of 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).

OM-07331SUPER T SERIES
PAGE B - 5INSTALLATION
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.
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.
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

OM-07331 SUPER T SERIES
PAGE B - 6 INSTALLATION
minimize the chance of plugging.
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.
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.
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 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 and correctly adjusted to
the specific hydraulic operating conditions of the
application, the Gorman‐Rupp Automatic Air Re
lease Valve will permit air to escape through the by
pass line, and then close automatically when the
pump is fully primed and pumping at full capacity.
Theory of Operation
Figures 3 and 4 show a cross‐sectional view of the
Automatic Air Release Valve, and a corresponding
description of operation.

OM-07331SUPER T SERIES
PAGE B - 7INSTALLATION
É
É
É
Figure 3. Valve in Open Position
During the priming cycle, air from the pump casing
flows through the bypass line, and passes through
the Air Release Valve to the wet well (Figure 3).
É
É
É
Figure 4. Valve in Closed Position
When the pump is fully primed, pressure resulting
from flow against the valve diaphragm com
presses the spring and closes the valve (Figure 4).
The valve will remain closed, reducing the bypass
of liquid to 1 to 5 gallons (3.8 to 19 liters) per min
ute, until the pump loses its prime or stops.
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.
When the pump shuts down, the spring returns the
diaphragm to its original position. Any solids that
may have accumulated in the diaphragm chamber
settle to the bottom and are flushed out during the
next priming cycle.
NOTE
The valve will remain open if the pump does not
reach its designed capacity or head. Valve closing
pressure is dependent upon the discharge head of
the pump at full capacity. The range of the valve
closing pressure is established by the tension rate
of the spring as ordered from the factory. Valve clos
ing pressure can be further adjusted to the exact
system requirements by moving the spring retain
ing pin up or down the plunger rod to increase or
decrease tension on the spring. Contact your Gor
man‐Rupp distributor or the Gorman‐Rupp Com
pany for information about an Automatic Air Re
lease Valve for your specific application.
Air Release Valve Installation
The Automatic Air Release Valve must be inde
pendently mounted in a horizontal position and
connected to the discharge line of the self‐priming
centrifugal pump (see Figure 5).
NOTE
If the Air Release Valve is to be installed on a staged
pump application, contact the factory for specific
installation instructions.

OM-07331 SUPER T SERIES
PAGE B - 8 INSTALLATION
DISCHARGE PIPE
DISCHARGE
CHECK VALVE
PUMP DISCHARGE
SELF‐PRIMING
CENTRIFUGAL
PUMP
SUCTION
LINE
SUPPORT
BRACKET
CLEAN‐OUT
COVER
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
90LONG
RADIUS
ELBOW
WET WELL
OR SUMP
BLEED LINE 1”
(25,4 MM) DIA. MIN.
(CUSTOMER FUR
NISHED) DO NOT EX
TEND BELOW PUMP
OFF LIQUID LEVEL
Figure 5. Typical Automatic Air Release Valve Installation
The valve inlet line must be installed between the
pump discharge port and the non‐pressurized side
of the discharge check valve. The valve inlet is at
the large end of the valve body, and is provided
with standard 1‐inch NPT pipe threads.
The valve outlet is located at the opposite end of
the valve, and is also equipped with standard
1‐inch NPT pipe threads. The outlet should be con
nected to a bleed line which slopes back to the wet
well or sump. The bleed line must be the same size
as the inlet piping, or larger. If piping is used for the
bleed line, avoid the use of elbows whenever pos
sible.
NOTE
It is recommended that each Air Release Valve be
fitted with an independent bleeder line directed
back to the wet well. If multiple Air Release Valves
are installed in a system, they must be fitted with in
dependent bleeder lines; never use a common
manifold pipe. Contact your Gorman‐Rupp dis
tributor or the Gorman‐Rupp Company for informa
tion about installation of an Automatic Air Release
Valve for your specific application.

OM-07331SUPER T SERIES
PAGE B - 9INSTALLATION
ELECTRICAL CONNECTIONS
This pump is driven by an electric motor. Check
that the electrical service available matches the
motor requirements stamped on the motor name
plate before connecting the motor to the incoming
power.
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 mo
tor wiring diagram or the literature supplied with
the motor for specific instructions.
The electrical power used to operate the
pump is high enough to cause injury or
death. Obtain the services of a qualified
electrician to make all electrical con
nections.
Do not install and operate a non‐explo
sion proof motor in an explosive atmo
sphere. Install, connect, and operate
the motor in accordance with The Na
tional Electric Code and all local codes.
If there is a conflict between the instruc
tions in the manual accompanying the
unit and The National Electric Code or
the applicable local code, The National
or local code shall take precedence.
Refer to the following motor data before making
electrical connections.
VOLTAGE PHASE HP Hz RPM START
115/230 1 60 1725 Capacitor
MODEL
T2C60SC-E3 1P 3
208/230/460 3 3 60 1750 Induction
575 575/3
10 60 3450 Induction
T2C60SC-E3 3P
T2C60SC-E10 3P
575 575/3 10 60 3450 InductionT2C60SC-E10 575/3
208/230/460 3
3 60 1750 InductionT2C60SC-E3 575/3

SUPER T‐SERIES OM-07331
OPERATION PAGE C - 1
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
This pump is designed to handle liquids
containing entrained solids and slur
ries. Do not attempt to pump volatile,
corrosive, or flammable liquids which
may damage the pump or endanger per
sonnel as a result of pump failure.
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.
Never operate this pump unless there is
liquid in the pump casing. The pump will
not prime when dry. extended operation of
a dry pump will destroy the seal assembly.
Add liquid to the pump casing when:
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
motor.
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.
Briefly apply power to the motor while observing
the direction of shaft rotation through the “window”
in the side of the intermediate.
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.

SUPER T‐SERIESOM-07331
OPERATIONPAGE C - 2
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.
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.
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(71C). Do not apply it at a higher operating
temperature.
Overheating can occur if operated with the valves
in the suction or discharge lines closed. Operating
against closed valves could bring the liquid to a
boil, build pressure, and cause the pump to rup
ture or explode. If overheating occurs, stop the
pump and allow it to cool before servicing it. Refill
the pump casing with cool liquid.
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.
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
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.