PUBLICATION NUMBER
OM-06629-01
April 17, 2013
Rev. B 01‐13‐14
SF SERIES
EXPLOSION‐PROOF PUMPS
THE GORMAN‐RUPP COMPANY D MANSFIELD, OHIO
www.grpumps.com
GORMAN‐RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADAPrinted in U.S.A.
e2013 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
INTRODUCTIONPAGE I - 1.................................................
SAFETY ‐ SECTION APAGE A - 1............................................
INSTALLATION - SECTION BPAGE B - 1....................................
GENERAL INFORMATIONPAGE B - 1..................................................
PREINSTALLATION INSPECTIONPAGE B - 1............................................
LUBRICATIONPAGE B - 1.............................................................
PUMP MOTOR SPECIFICATIONSPAGE B - 1............................................
PUMP INSTALLATIONPAGE B - 2......................................................
LiftingPAGE B - 2.................................................................
Impeller RotationPAGE B - 2.......................................................
Positioning the Pump (Guide Rail Application)PAGE B - 3.............................
Positioning the Pump (Stand Application)PAGE B - 3.................................
PipingPAGE B - 3................................................................
ELECTRICAL CONNECTIONSPAGE B - 3...............................................
Field Wiring Connections (Incoming Power)PAGE B - 3...............................
Dual VoltagePAGE B - 4...........................................................
Motor Cable Grounding TestPAGE B - 4.............................................
Control Box ConnectionsPAGE B - 4...............................................
Liquid Level DevicesPAGE B - 5....................................................
OPERATION - SECTION CPAGE C - 1......................................
GENERAL INFORMATIONPAGE C - 1..................................................
Pump PerformancePAGE C - 1.....................................................
Control BoxPAGE C - 1...........................................................
PUMP OPERATIONPAGE C - 1........................................................
Liquid Temperature And OverheatingPAGE C - 1.....................................
STARTING, STOPPING AND OPERATIONAL CHECKSPAGE C - 2.........................
StartingPAGE C - 2...............................................................
StoppingPAGE C - 2..............................................................
Operational ChecksPAGE C - 2....................................................
COLD WEATHER PRESERVATIONPAGE C - 3...........................................
LUBRICATIONPAGE C - 3.............................................................
Draining OilPAGE C - 3...........................................................
Condition of OilPAGE C - 3........................................................
Adding OilPAGE C - 3............................................................
TROUBLESHOOTING - SECTION DPAGE D - 1..............................
ELECTRICAL TESTINGPAGE D - 3.....................................................
Test EquipmentPAGE D - 3........................................................
Voltage ImbalancePAGE D - 3.....................................................
Motor and Power Cable ContinuityPAGE D - 3.......................................
Insulation ResistancePAGE D - 4...................................................
i
Page 4
TABLE OF CONTENTS
(continued)
PUMP MAINTENANCE AND REPAIR ‐ SECTION EPAGE E - 1.................
GENERAL INFORMATIONPAGE E - 1..................................................
LiftingPAGE E - 1.................................................................
Pump Serial NumbersPAGE E - 1..................................................
PARTS LISTS:
Pump Model SF4A-XPAGE E - 3..................................................
PUMP END DISASSEMBLY AND REASSEMBLYPAGE E - 4...............................
PUMP END DISASSEMBLYPAGE E - 4.................................................
Preparing Pump for DisassemblyPAGE E - 4........................................
Suction Head and Wear Ring RemovalPAGE E - 5....................................
Pump Casing RemovalPAGE E - 5.................................................
Draining Oil From Seal CavityPAGE E - 5............................................
Impeller RemovalPAGE E - 5......................................................
Seal RemovalPAGE E - 6..........................................................
PUMP END REASSEMBLYPAGE E - 6..................................................
Hardware Torque ValuesPAGE E - 6................................................
Cleaning and Inspection of Pump PartsPAGE E - 6...................................
Seal InstallationPAGE E - 7........................................................
Impeller InstallationPAGE E - 8.....................................................
Suction Head and Wear Ring InstallationPAGE E - 8..................................
Pump Casing InstallationPAGE E - 8................................................
Impeller Face Clearance AdjustmentPAGE E - 9.....................................
Final AssemblyPAGE E - 9........................................................
LUBRICATIONPAGE E - 9.............................................................
Seal CavityPAGE E - 9............................................................
ii
Page 5
OM-06629SF SERIES X‐PROOF PUMPS
INTRODUCTION
Thank You for purchasing a Gorman‐Rupp SF
Series explosion‐proof 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 manual contains essential information on in
stalling and operating the pump, and on making
electrical connections. However, since pump in
stallations are seldom identical, some of the infor
mation only summarizes general recommenda
tions and practices required to inspect, position,
and arrange the pump and piping.
This manual provides troubleshooting and mainte
nance instructions required to properly diagnose
operational problems, and to service the pump hy
draulic components only. Pump motor mainte
nance may be performed only by a Gorman‐Rupp
authorized repair facility, or the factory. Otherwise,
the pump warranty will be negated, and damage
to the pump, and injury or death to personnel can
result. Contact the factory for the authorized repair
facility closest to you.
The motor powering this pump is approved by
either CSA and/or FM for Class 1, Division 1,
Groups C and D environments. Refer to the name
plate on your pump for agency approval informa
tion. All repairs to the pump, other than seal, impel
ler and other hydraulic components, must be per
formed by a Gorman‐Rupp authorized repair facil
ity or the factory. Any repairs to the motor assembly
performed by the customer or an unauthorized re
pair facility negates the agency approval and the
motor warranty, and damage to the pump, and in
jury or death to personnel can result. If the motor
is dual‐voltage, the pump is shipped from the fac
tory wired only for the voltage shown on the name
plate. If desired to have the voltage changed, re
turn the pump to the factory or to a Gorman‐Rupp
authorized repair facility.
The pump motor must be operated through an ap
propriate control box matching the voltage and
other characteristics of the motor. The control box
must provide for proper operation of the motor pro
tection devices, such as the integral moisture and
thermal switches. Control boxes and other control
devices not integral to the pump are not covered
in this manual.
Pump construction is cast iron, with stainless steel
shaft and hardware.
These pumps may be equipped with a guide shoe
for mounting on guide rails in a wet well. A guide
rail system, controls and liquid level devices are
available from the factory as optional equipment.
If there are any questions regarding the pump
which are not covered in this manual or in other lit
erature accompanying the unit, please contact
your Gorman‐Rupp distributor or the Gorman‐
Rupp Company:
The Gorman‐Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901-1217
Phone: (419) 755-1011
or:
Gorman‐Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: (519) 631-2870
RECORDING MODEL AND
SERIAL NUMBERS
Please record the pump model, serial number, volt
age, and motor impeller diameter in the spaces
provided below. Your Gorman‐Rupp distributor
needs this information when you require parts or
service.
Pump Model:
Serial Number:
Voltage:
Impeller Diameter:
WARRANTY INFORMATION
The warranty provided with your pump is part of
Gorman‐Rupp's support program for customers
who operate and maintain their equipment as de
scribed in this and the other accompanying litera
ture. Please note that should the equipment be
abused or modified to change its performance be
yond the original factory specifications, the war
ranty will become void and any claim will be de
nied.
PAGE I - 1INTRODUCTION
Page 6
OM-06629SF SERIES X‐PROOF PUMPS
HAZARD AND INSTRUCTION
DEFINITIONS
The following are used to alert personnel to proce
dures which require special attention, 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 de
scribe the requirements and the possible
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 - 2INTRODUCTION
Page 7
OM-06629SF SERIES X‐PROOF PUMPS
SAFETY - SECTION A
The following information applies
throughout this manual to Gorman‐
Rupp SF Series explosion‐proof sub
mersible pumps.
When installing or servicing the pump
or controls, follow all requirements for
the installation of wiring or electrical
equipment in hazardous locations as
outlined in the National Electric Code.
Before attempting to install, operate, or
service this pump, familiarize yourself
with this manual, and with all other liter
ature shipped with the pump. Unfamil
iarity with all aspects of pump operation
covered in this manual could lead to de
struction of equipment, injury, or death
to personnel.
When entering the pump wet well for in
stallation or service, follow all safety re
quirements for confined space entry.
Failure to observe these requirements
could result in injury or death to person
nel.
The motor powering this pump is ap
proved by either CSA and/or FM for
Class 1, Division 1, Groups C and D en
vironments. Refer to the nameplate on
your pump for agency approval inform
ation. Any liquid level devices used with
the pump must be intrinsically safe for
use in these environments.
Any control box used to operate the
pump must meet all applicable local
and national codes for the application.
If the control box is to be installed in an
explosive environment, it must be a
Nema 7 rating or better. If a non‐explo
sion proof control box is used, it must be
located outside the explosive environ
ment. Improper location of a non‐explo
sion proof control box could result in de
struction of equipment, injury, or death
to personnel.
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 make all electrical
connections.
Do not connect the pump motor directly
to the incoming power lines. The pump
motor is designed to operate through a
control box which provides overload
protection and power control; other
wise, the pump warranty will be voided.
Make certain that the pump and control
box are properly grounded, and that the
incoming power matches the require
ments of the pump and controls. Install
and operate the control box in accor
dance with the National Electric Code
and all local codes. Failure to follow
these could result in injury or death to
personnel.
PAGE A - 1SAFETY
Page 8
SF SERIES X‐PROOF PUMPSOM-06629
ing equipment to the lifting bail fitted on
the pump. Lift the pump or component
only as high as necessary and keep per
This pump is not designed to pump vol
sonnel away from suspended objects.
atile, flammable, or corrosive liquids.
The maximum temperature of the liquid
being pumped should not exceed 104_F
(40_C); do not apply the pump at higher
temperatures. Do not attempt to pump
any liquids which may damage the
pump or endanger personnel as a result
of pump failure.
This pump was wired at the factory only
for the voltage shown on the nameplate.
Do not attempt to change the voltage on
a dual‐voltage motor. If desired to have
the voltage changed, return the pump to
the factory or to an authorized Gorman‐
Rupp repair facility only; otherwise, the
pump warranty will be negated, and
The following precautions should be
taken before attempting to service the
damage to the pump, and injury or death
to personnel can result.
pump; otherwise, injury or death could
result.
1. Familiarize yourself with this man
ual and with all other literature
shipped with the pump.
2. Lock out incoming power to the
pump or control box to ensure that
the pump will remain inoperative.
3. Allow the pump to completely cool
if overheated.
If the pump is used to handle liquids
which may cause illness or disease
through direct exposure, take neces
sary precautions during maintenance
and repair to prevent personal contami
nation.
4. Close the discharge valve (if
used).
The motor powering this pump is ap
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. Do not attempt to
lift this pump by the motor or control
cables, or the piping. Attach proper lift
PAGE A-2SAFETY
proved by either CSA and/or FM for Class
1, Division 1, Groups C and D environ
ments. Refer to the nameplate on your
pump for agency approval information. All
repairs to the pump, other than seal, impel
ler and other hydraulic components, must
be performed by a Gorman‐Rupp autho
rized repair facility or the factory. Any re
pairs to the motor assembly performed by
the customer or an unauthorized repair fa
cility negates the agency approval and the
motor warranty.
Page 9
OM-06629SF SERIES X‐PROOF PUMPS
Loose connections can result in damage to
equipment and serious injury to personnel.
After the pump has been installed, make
certain that the pump and all piping or hose
connections are secure before operation.
PAGE A - 3SAFETY
Page 10
OM-06629SF SERIES X‐PROOF PUMPS
INSTALLATION - SECTION B
GENERAL INFORMATION
Review all SAFETY information in Section A.
Since pump installations are seldom identical, this
section is intended only to summarize general rec
ommendations and practices required to inspect,
position, and arrange the pump and piping. If there
are any questions concerning your specific instal
lation, contact your Gorman‐Rupp distributor or
the Gorman‐Rupp Company.
The pump motor is not designed to be
operated in air for more than 10 minutes
without overheating. The pump must be
operated through a liquid level control de
signed to cut off power when liquid falls be
low the midpoint of the motor housing
(single pump operation), or below the dis
charge flange (duplex, alternating pump
operation).
Controls, liquid level devices, and a guide rail sys
tem are available from Gorman‐Rupp as optional
equipment. For more information on installing and
operating these options, refer to the other literature
accompanying the option(s).
PREINSTALLATION INSPECTION
The pump assembly was inspected and tested be
fore shipment from the factory. Before installation,
check for damage which may have occurred dur
ing shipment. Check as follows:
a. Inspect the pump assembly for cracks, dents,
damaged threads, and other obvious dam
age.
b. Check for loose attaching hardware. Since
gaskets tend to shrink after drying, check for
loose hardware at the mating surfaces.
c. Inspect the power cable for cuts or any other
obvious damage.
d. Check that amperes, phase, voltage and
hertz indicated on the name plate match the
ratings on the control box and incoming pow
er.
e. Carefully read all tags, decals, and markings
on the pump, and perform all duties indicated.
f. Check for oil leaks. If there is any indication of
an oil leak, see LUBRICATION at the end of
this manual.
LUBRICATION
These pumps are equipped with two separate
mechanical seals.
The seals prevent the liquid being pumped from
entering the seal housing cavity from the pump
end, and at the same time prevents the oil in the
seal housing from leaking into the motor housing.
The upper pump seal is lubricated by oil in the seal
housing (see LUBRICATION at the end of this
manual). The lower seal is lubricated by the medi
um being pumped.
There is no other lubrication required for these
pumps.
Pump Motor Specifications
The motor furnished with this pump is an air‐filled,
60 Hz., Squirrel Cage, Induction Start model;
NEMA Class H Insulation Rated 356_F (180_C),
104_F (40_C) ambient, plus 252_F (140_C) tem
perature rise. The motor is approved for Class 1,
Division 1, Group C and D locations.
See Table B‐1 for motor specifications for each
motor frame size.
PAGE B - 1INSTALLATION
Page 11
SF SERIES X‐PROOF PUMPSOM-06629
Table B‐1. Pump Motor Specifications
G‐RFullLockedLR
MotorHPVoltsPHHzRPMLoadRotorCode StartDesign Service
When installing or servicing the pump
or controls, follow all requirements for
the installation of wiring or electrical
equipment in hazardous locations as
outlined in the National Electric Code.
When entering the pump wet well for in
stallation or service, follow all safety re
quirements for confined space entry.
Failure to observe these requirements
could result in injury or death to person
nel.
Do not allow the free end of the power
cable to enter the liquid being pumped.
The free end of the cable must be kept dry
to prevent liquid from wicking through the
cable and into the motor.
NOTE
Refer to the performance curve on the pump Spe
cification Data Sheet when determining the most ef
ficient piping installation. The recommended
maximum submergence depth is 65 feet.
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. Do not attempt to
lift this pump by the motor or control
cables, or the piping. Attach proper lift
ing equipment to the lifting bail fitted on
the pump. Lift the pump or component
PAGE B - 2INSTALLATION
Page 12
OM-06629SF SERIES X‐PROOF PUMPS
only as high as necessary and keep per
sonnel away from suspended objects.
Pump unit weights will vary depending on the
pump application. 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 equip
ment such as discharge hoses or piping before at
tempting to lift existing, installed units.
Impeller Rotation
Check impeller rotation as follows before installing
the pump on rails or in a wet well.
While checking impeller rotation, secure
the pump to prevent the motor power
cable from coiling.
Suspend the pump by the lifting handle. Apply
power briefly and note the direction of pump kick
back. As viewed from the top, the pump should
kick in a counterclockwise direction; this will indi
cate that impeller rotation is correct.
If the pump kicks in a clockwise direction, impeller
rotation is incorrect. If the pump is powered by a
three‐phase motor, have a qualified electrician in
terchange the control box connections of any two
pump motor power leads. Re‐check pump kick
back; it should now be in a counterclockwise direc
tion.
If rotation is incorrect on a single‐phase motor, con
tact the factory before installing the pump.
Positioning the Pump (Guide Rail Application)
If the pump is to be installed where flam
mable vapors may be present, the guide
rail system must be of a non‐sparking
design suitable for explosion‐proof ser
vice. Failure to observe this require
ment could result in injury or death to
personnel.
The pump may equipped with a guide shoe for
mounting on optional guide rails. A discharge el
bow/baseplate is also available as optional equip
ment.
Use a suitable lifting device attached to the lifting
handle to lift the pump. Engage the guide shoe at
the top of the guide rails, and lower the pump into
the sump. When lowered into place, the guide
shoe connects to the optional discharge elbow/
baseplate, and the pump is automatically and se
curely sealed to the piping system; the pump can
be removed or installed without personnel entering
the wet well.
For information on installing the guide rails, see the
literature accompanying the rails. Be sure the in
stallation allows the pump to slide without binding
on the rails or baseplate.
NOTE
When engaging the guide shoe and elbow/base
plate, make sure that the connection is not impeded
by mounting hardware, and that the guide shoe is
fully seated in the baseplate.
Reel in any slack control cable so that it is not
dragged into the pump suction.
Positioning the Pump (Stand Application)
Secure a discharge hose to the pump discharge
connection, and use a suitable lifting device at
tached to the lifting handle to lower the pump into
the wet well. The recommended maximum sub
mergence depth is 65 feet.
Make certain that the pump and stand sit level in
the wet well.
Reel in any slack control cable so that it is not
dragged into the pump suction.
Piping
The optional discharge elbow/baseplate is drilled
for connection to a discharge flange for slide rail
applications. Either hose or rigid pipe may be used
to make discharge connections.
If rigid discharge piping is installed, the line must
be independently supported to avoid vibration and
strain on the pump. For maximum pumping capac
ity, keep the line as short and straight as possible.
Elbows and fittings used in discharge lines in
crease friction loss; minimize their use.
PAGE B - 3INSTALLATION
Page 13
SF SERIES X‐PROOF PUMPSOM-06629
It is recommended that a check valve or throttling
valve be installed in the discharge line to control si
phoning or back flow when the pump is shut off.
ELECTRICAL CONNECTIONS
Install and operate this pump in accor
dance with the National Electrical Code
and all local codes. Have a qualified
electrician perform all checks and con
nections in this section.
Never attempt to alter the length of the
pump motor cable or to repair it with a
splice. The power cable and pump mo
tor must be kept completely waterproof.
Serious damage to the pump and injury
or death to personnel can result from
any alteration to the cable.
Field Wiring Connections (Incoming Power)
Do not connect the pump motor directly
to the incoming power lines. The pump
motor is designed to operate through a
control box which provides overload
protection and power control; other
wise, the pump warranty will be voided.
Make certain that the pump and control
box are properly grounded, and that the
incoming power matches the require
ments of the pump and controls. Install
and operate the control box in accor
dance with the National Electric Code
and all local codes. Failure to follow
these could result in injury or death to
personnel.
Field wiring is not provided with this pump, and
must be supplied by the user. The field wiring must
be of the proper size and type to ensure an ade
quate voltage supply to the pump. Voltage avail
able at the motor must be within the range indi
cated in Table B‐2.
Table B‐2. Pump Voltage Requirements
NOMINAL
VOLTAGE
230
460
Use conduit cable clamps to secure the incoming
field wiring to the control box. Make certain all con
nections are tight. If necessary, support the cable
weight to prevent excessive strain on cable clamps
and cable.
Refer to the wiring diagrams at the end of this sec
tion for field wiring connections.
Dual Voltage
PHASE
3208187229
3
3
3575517632
MINIMUM
VOLTAGE
207
414
MAXIMUM
VOLTAGE
253
506
This pump was wired at the factory only
for the voltage shown on the nameplate.
Do not attempt to change the voltage on
a dual‐voltage motor. If desired to have
the voltage changed, return the pump to
the factory or to an authorized Gorman‐
Rupp repair facility only; otherwise, the
pump warranty will be negated, and
damage to the pump, and injury or death
to personnel can result.
Motor Cable Grounding Test
Do not connect the pump control cable
to the control box or incoming voltage
before verifying the pump ground;
otherwise, personnel will be exposed to
serious injury or death.
Connect one lead of a lamp, bell or similar testing
device to the motor cable green/yellow ground
lead (s). Connect the second test lead to an uninsulated point on the pump body. The test circuit
should close.
PAGE B - 4INSTALLATION
Page 14
OM-06629SF SERIES X‐PROOF PUMPS
If the test circuit does not close, there is a defect in
the cable or motor which must be corrected.
Control Box Connections
The motor powering this pump is ap
proved by both CSA and FM for Class 1,
Division 1, Groups C and D environ
ments. Any liquid level devices used
with the pump must be intrinsically safe
for use in these environments.
Any control box used to operate the
pump must meet all applicable local
and national codes for the application. If
the control box is to be installed in an ex
plosive environment, it must be a Nema
7 rating or better. If a non‐explosion
proof control box is used, it must be lo
cated outside the explosive environ
ment. Improper location of a non‐explo
sion proof control box could result in de
struction of equipment, injury, or death
to personnel.
This pump is shipped completely wired for the volt
age shown on the nameplate and is ready for op
eration through an approved control box.
Ground the control box in accordance with the in
structions accompanying it.
Refer to Figure B-1 and connect the pump motor
cable to the control box.
Figure B-1. Three Phase Power
Cable Connections
Control leads P1 and P2 provide the motor with
thermal protection. Control leads W1 and W2 pro
vide the motor with moisture protection. Refer to
Figure B-2 and connect the pump control cable to
the control box.
Ground the pump to the control box using the pow
er cable ground(s) and ground check wire (if so
equipped). Secure the ground wire(s) and ground
check wire (if so equipped) to the grounding lug(s)
inside the control box to ensure a thorough ground
for the pump.
Ground the pump using the power cable
ground wire(s) before applying line po
tential. Failure to properly ground the
pump could result in damage to the
pump or control and/or injury or death to
personnel.
Figure B-2. Control Cable Connections
The thermal protection contacts will auto
matically re‐close when the motor cools to
the established safe operating tempera
ture. Whenever automatic restarting is not
desirable, connect only to controls which
are wired for manual restart.
PAGE B - 5INSTALLATION
Page 15
SF SERIES X‐PROOF PUMPSOM-06629
Refer to the appropriate wiring diagram accompa
nying the control box when making electrical con
nections.
Liquid Level Devices
Optional controls available from Gorman‐Rupp
may provide a means to automatically regulate the
liquid level. These control boxes may be con
nected to the following sensing devices which per
form either filling or dewatering functions (see Fi
gure B-3).
The internal wiring of the sensing devices
are different for filling and dewatering func
tions. Be sure to follow the instructions in
cluded with the option before making con
nections.
SDiaphragm Type: two fixed‐position sen
sors (upper and lower) each contain a dia
phragm which flexes with changes in liquid
level, thus activating an enclosed miniature
switch.
SBulb (Float) Type: a bulb raises or lowers
(floats) with the liquid level, thus activating
an enclosed miniature switch.
Other types of liquid level devices may also be
used. Consult the factory for the liquid level device
best suited for your application.
Liquid level devices must be positioned far
enough to allow 6 minutes between starts.
If the pump motor cycles more than 10
starts per hour, it will over‐heat, resulting in
damage to the motor windings or control
box components.
PUMP
CONTROL BOX
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL
BOX
LIQUID LEVEL
RANGE
OFF
DEWATERING
ON (FILLING)
BULB (FLOAT TYPE)
Figure B-3. Liquid Level Devices
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL
BOX
LIQUID LEVEL
RANGE
DEWATERING
ON (FILLING)
DIAPHRAGM TYPE
PUMP
CONTROL BOX
OFF
PAGE B - 6INSTALLATION
Page 16
OM-06629SF SERIES X‐PROOF PUMPS
OPERATION - SECTION C
GENERAL INFORMATION
Review all SAFETY information in Section A.
This pump is not designed to pump vol
atile, flammable, or corrosive liquids.
The maximum temperature of the liquid
being pumped should not exceed 104_F
(40_C); do not apply the pump at higher
temperatures. Do not attempt to pump
any liquids which may damage the
pump or endanger personnel as a result
of pump failure.
Follow the instructions on all tags, labels and de
cals attached to the pump.
Pump Performance
Refer to the pump Specification Data Sheet for the
specific performance for your pump.
Control Box
The motor powering this pump is ap
proved by either CSA and/or FM for
Class 1, Division 1, Groups C and D en
vironments. Refer to the nameplate on
your pump for agency approval inform
ation. Any liquid level devices used with
the pump must be intrinsically safe for
use in these environments
Any control box used to operate the
pump must meet all applicable local
and national codes for the application.
If the control box is to be installed in an
explosive environment, it must be a
Nema 7 rating or better. If a non‐explo
sion proof control box is used, it must be
located outside the explosive environ
ment. Improper location of a non‐explo
sion proof control box could result in de
struction of equipment, injury, or death
to personnel.
See the operating instructions furnished with the
control box, and with other optional accessories
and controls, before attempting to start the pump.
PUMP OPERATION
Liquid Temperature and Overheating.
Overheated pumps can cause severe
burns and injury. If the pump becomes
overheated:
1. Stop the pump immediately.
2. Lock out the power to the control
panel to ensure that the pump will
remain inoperative.
2. Allow the pump to completely cool
if overheated.
3. Close the discharge valve (if
used).
4. Refer to instructions in this manual
before restarting the pump.
Overheating can occur if the pump is misapplied;
if it is started more than 10 times within one hour;
if the control box fails to provide overload or ther
mal protection, or if the pump is operated against
a closed discharge valve for an extended period of
time.
The submersible motor is cooled by the liquid be
ing pumped. To minimize the chance of over‐heat
ing when installed in a simplex application, it is
recommended that at least one‐half of the motor
remain immersed in the liquid.
PAGE C - 1OPERATION
Page 17
SF SERIES X‐PROOF PUMPSOM-06629
tempt to handle or service the pump un
less all power to the motor has been
shut off and locked out at the control
Do not start the pump more than 10 times
per hour. If the motor does not cool be
tween starts it will overheat, resulting in
damage to the motor windings or control
box components.
When installed in a standard alternating duplex
application, where one pump runs while the other
is shut down, the pump may be operated continu
ously until fully exposed. The shut down cycle will
provide sufficient time for the motor to cool.
box; otherwise, serious personal injury
could result.
During motor shutoff by the thermal
overload device, control box circuits re
main live. Do not attempt to service any
control box components unless incom
ing power has been shut off.
After stopping the pump, be sure to perform all re
quired maintenance and preservation procedures.
Operational Checks
STARTING, STOPPING, AND
OPERATIONAL CHECKS
Starting
Do not attempt to operate the pump until
impeller rotation has been checked; im
proper rotation will affect pump perform
ance and may damage the pump.
Follow the instructions accompanying the control
box, start the pump, and run any recommended
checks.
Stopping
Follow the instructions accompanying the control
box for stopping the pump.
To detect minor problems, check the pump for
proper operation when it is first started, and at peri
odic intervals during operation.
To avoid serious damage to the pump,
check for unusual noises or excessive vi
bration while the pump is running. If noise
or vibration is excessive, stop operation
and refer to the troubleshooting chart in
Section D.
The suction inlet or impeller may become clogged
with debris. In some cases, stopping the pump
momentarily may backflush this blockage. If back
flushing does not clear the debris, remove the
pump from the sump or wet well and clear manu
ally.
Never introduce air or steam pressure
The integral thermal overload device
will shut off the motor if the temperature
rises above design limits. When the
pump cools and the temperature falls
below these limits, the motor will restart
automatically. To avoid the hazards of
an unexpected motor start‐up, do not at
PAGE C - 2OPERATION
into the pump casing to remove a block
age. This could result in personal injury
or damage to the equipment. If back
flushing is absolutely necessary, limit
liquid pressure input to 50% of the maxi
mum permissible operating pressure
shown in the pump performance curve
Page 18
OM-06629SF SERIES X‐PROOF PUMPS
(refer to the pump Specification Data
Sheet).
Check the pump for overheating. Overheating can
occur if the pump is misapplied, required to start
repeatedly, if the control box fails to provide over
load or thermal protection, or if the pump is oper
ated against a closed discharge valve for an ex
tended period of time.
Do not start the pump more than 10 times
per hour. If the motor does not cool be
tween starts it will overheat, resulting in
damage to the motor windings or control
box components.
Do not attempt to thaw the pump by us
ing a torch or other source of flame. This
could damage O‐rings or heat the oil in
the seal housing above critical tempera
tures, causing the pump to rupture or
explode.
LUBRICATION
Before installing or removing the lubrica
tion plugs, always make sure the pump is
completely cool, and clean the area
around the plugs to prevent contamination
of the oil.
Check the oil level in the seal cavity before initial
startup, after the first two weeks of operation, and
every month thereafter.
Check the oil level only when the pump
is cool. If the oil level plug is removed
when the pump is hot, pressure in the
seal cavity can cause hot oil to be
ejected as the plug is removed.
Draining Oil
Lay the pump flat on a work surface with one of the
lubrication plugs facing up. Remove the plug slow
ly to release any pressure in the seal housing.
COLD WEATHER PRESERVATION
The pump will not freeze as long as the casing is
submerged in liquid. If the casing is not sub
merged, or if the liquid begins to freeze, remove the
pump from the sump or wet well and dry it thor
oughly. Run the pump for two or three minutes to
dry the inner walls.
If the pump does freeze while it is out of the liquid,
submerge it until thawed; if the liquid is near freez
ing, the pump must be submerged for an extended
period of time. Check thawing by starting the pump
and checking that the shaft rotates freely. If the
pump remains frozen, allow additional thawing
time before attempting to restart.
If submerging does not thaw the pump, move it
into a warm area until completely thawed.
Place a clean container under the other (lower)
plug. Remove the plug and roll the pump on its side
to drain the seal housing.
Condition Of Oil
Check the condition of the oil drained from the
pump. Clear oil indicates that the lower pump seal
is functioning properly. If the oil is milky or contains
water, the lower seal must be changed before the
pump is put back in operation.
Adding Oil
Remove the lubrication plugs as indicated in
Draining Oil. Position the pump upright and add
premium quality submersible pump oil through
one of the plug holes until the oil reaches the bot
tom of the hole. Clean and re‐install the plugs.
PAGE C - 3OPERATION
Page 19
SF SERIES X‐PROOF PUMPSOM-06629
The grade of lubricant used is critical to the opera
tion of this pump. Use premium quality hydraulic oil
as specified in Table C-1.
Table C-1. Pump Oil Specifications
Specifications:
TypePremium high viscosity index, anti‐wear hydraulic oil..............................
Viscosity @ 100_F (38_C)110 to 155...............................................
Viscosity @ 210_F (99_C)40 to 50..................................................
ExxonNuto H 32...................................................................
PAGE C - 4OPERATION
Page 20
OM-06629SF SERIES X‐PROOF PUMPS
TROUBLESHOOTING - SECTION D
Review all SAFETY information in Section A.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
The following precautions should be
taken before attempting to service the
pump; otherwise, injury or death could
result.
opening any covers, plates or
plugs.
4. Close the discharge valve (if
used).
1. Familiarize yourself with this man
ual and with all other literature
shipped with the pump.
2. Lock out incoming power to the
pump or control box to ensure that
Many of the probable remedies listed below re
quire use of electrical test instruments; for specific
procedures, see ELECTRICAL TESTING following
the chart.
NOTE
the pump will remain inoperative.
TROUBLEPOSSIBLE CAUSEPROBABLE REMEDY
PUMP FAILS TO
START
No power to motor.Check for blown fuse or open
circuit breaker.
Impeller jammed.Check Impeller; disassemble and
repair as necessary.
Motor, voltage or control box incompat‐Check ratings on pump nameplate
ible; defective connections.and control box; check incoming
voltage; check connections.
Motor cable damaged.Check (see Electrical Testing).
Control box current interrupting orCheck control box; check for leaking
moisture‐sensing devices tripped.shaft seals, cut O‐rings, or moisture
wicking through cable.
Open circuit in motor windings or.Check continuity (see Electrical
cable.Testing).
Motor overheated, thermal switchesAllow motor to cool.
tripped.
TROUBLESHOOTINGPAGE D - 1
Page 21
SF SERIES X‐PROOF PUMPSOM-06629
TROUBLEPOSSIBLE CAUSEPROBABLE REMEDY
MOTOR RUNS BUT
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
PUMP STARTS
THEN SHUTS OFF
Pump running backwards.Check and correct impeller rotation
(see Rotation in Installation and
Operation Manual).
Voltage too low or too high; excessiveCheck incoming voltage; check
voltage drop between pump and control. cable length.
Discharge head too high.Reduce discharge head, or install
Impeller or discharge line clogged.Check and clear as necessary.
Liquid being pumped too thick.Dilute liquid if possible.
Impeller worn or damaged.Replace.
Insufficient liquid in wet well.Stop pump until liquid level rises;
install liquid level devices.
Clogged suction port or impellerClear blockage; reset overload
causing motor to overload.device in control box.
EXCESSIVE
NOISE OR VIBRA
TION
Motor overheated; thermal switchAllow pump to cool.
tripped.
Moisture sensing device tripped.Return pump to factory or authorized
repair facility.
Motor bearings defective.Return pump to factory or authorized
repair facility.
Motor cable damaged.Check (see Electrical Testing).
Insufficient liquid in wet well.Stop pump until liquid level rises;
install liquid level devices.
Pump operating outside designedCheck discharge head and flow;
operating range.adjust as required to meet perform‐
ance specifications.
Impeller clogged.Clear blockage.
Impeller loose or damaged.Check impeller; replace if necessary.
Motor shaft or bearings defective.Replace.
Pumping entrained air.Check wet well liquid level; install
baffles if required.
TROUBLESHOOTINGPAGE D - 2
Page 22
OM-06629SF SERIES X‐PROOF PUMPS
ELECTRICAL TESTING
Make the electrical checks which follow to deter
mine if pump malfunctions are being caused by
problems in the motor or in the power cable.
Test Equipment
A volt/amp/ohmmeter and megohmmeter of ade
quate range and quality are required to conduct
the electrical tests which follow. Use commercially
available equipment as listed below.
EquipmentUse
AmmeterTo check AC Voltage
and current (amperage)
OhmeterTo measure resistance
(ohms) to ground
can be measured. If possible, measure the
voltage at the control box with:
1. The pump off.
2. The pump running in air.
3. The pump submerged and running under
full load.
The voltage measured under each condition must
be the same.
b. If voltage is balanced when the pump is off but
is imbalanced when the pump is running,
thoroughly check the power source, all inter
connecting cables, and the pump motor to
isolate the defect.
c. Use an Amprobe or equivalent instrument to
measure the current draw (amperage) of
each phase while the pump is running under
full load, and with no load. In each condition,
the amperage readings for all three phases
must match as closely as can be measured.
Normal amperage values are listed in Table 1,
Section B; these values apply only when the
voltage at the site is the normal voltage listed.
Refer to the wiring diagram(s) accompany
ing the motor and control box before re
connecting any electrical leads which have
been disconnected. Connections to the
wrong terminals may damage the motor
and/or control devices.
Voltage Imbalance
Use a voltmeter to read each phase of the incom
ing 3‐phase power. Each phase must balance with
the other two as closely as can be measured with a
commercial instrument. If the phases are out of
balance, contact your power company. If the
phases are balanced, check out the motor as de
scribed in the following steps:
a. Use a voltmeter, Amprobe, or equivalent in
strument to read the voltage of incoming
power lines 1 and 2, 2 and 3, and 1 and 3 at the
control box. Voltage must match as closely as
TROUBLESHOOTINGPAGE D - 3
Motor and Power Cable Continuity
Set the megohmmeter at R x 1 scale and zero‐
balance it. Test as follows:
a. Shut off incoming power to the control box,
and disconnect the motor power cable leads.
Connect the megohmmeter test leads to any
two power cable leads, and note the megohm
meter reading. A high resistance reading indi
cates an open or broken circuit in the power
cable or motor windings, or a bad connection
between the motor and cable.
b. Repeat Step a. with each set of leads. The
three readings should be as close as can be
measured.
c. If readings indicate that continuity problems
exist in the motor or power cable, the motor
must be returned to the factory or to a Gor
man‐Rupp authorized repair facility.
Page 23
SF SERIES X‐PROOF PUMPSOM-06629
Insulation Resistance
Set the megohmmeter at R x 100, and zero‐ba
lance it. Test as follows:
a. Shut off incoming power to the control box,
and disconnect the motor power cable leads.
Connect one megohmmeter test lead to the
motor cable green/yellow ground lead. Touch
the other test lead to each of the motor cable
leads in turn. Note the readings.
b. Readings will indicate resistance values in
both the power cable and motor windings.If
resistance reads infinity (1), insulation is
good. If resistance reads between infinity (1),
and 1 megohm, insulation is acceptable but
should be rechecked regularly. If resistance
reads less than 1 megohm, insulation should
be checked more closely and frequently.
c. If readings indicate that a ground exists, the
motor must be returned to the factory or to a
Gorman‐Rupp authorized repair facility.
TROUBLESHOOTINGPAGE D - 4
Page 24
PUMP MAINTENANCE AND REPAIR - SECTION E
OM-06629SF SERIES X‐PROOF PUMPS
GENERAL INFORMATION
Review all SAFETY information in Section A.
Do not attempt to service the pump as
sembly unless all power to the motor
has been shut off at the control box;
otherwise, injury or death could result.
Select a suitable location, preferably indoors, to
perform required maintenance. All work must be
performed by qualified personnel.
The motor powering this pump is ap
proved by either CSA and/or FM for Class
1, Division 1, Groups C and D environ
ments. Refer to the nameplate on your
pump for agency approval information. All
repairs to the pump, other than seal, impel
ler and other hydraulic components, must
be performed by a Gorman‐Rupp autho
rized repair facility or the factory. Any re
pairs to the motor assembly performed by
the customer or an unauthorized repair fa
cility negates the agency approval and the
motor warranty.
Check TROUBLESHOOTING, Section D to deter
mine causes and remedies of pump problems.
This section of the manual provides maintenance
instructions required to properly service the pump
hydraulic components only. Pump motor mainte
nance may be performed only by a Gorman‐Rupp
authorized repair facility, or the factory. Otherwise,
the pump warranty will be negated, and damage
to the pump, and injury or death to personnel can
result. Contact the factory for the authorized repair
facility closest to you.
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. Do not attempt to
lift this pump by the motor or control
cables, or the piping. Attach proper lift
ing equipment to the lifting bail fitted on
the pump. Lift the pump or component
only as high as necessary and keep per
sonnel away from suspended objects.
Pump unit weights will vary depending on the
pump application. 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 equip
ment such as discharge hoses or piping before at
tempting to lift existing, installed units.
Pump Serial Numbers
Pumps in the following serial number range are
covered in this section.
(From S/N 1531245 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.
NOTE: FOR IMPELLER P/N, CONTACT THE FACTORY WITH PUMP MODEL, S/N AND IMPELLER DIAMETER (FROM NAMEPLATE)
PAGE E - 17MAINTENANCE AND REPAIR
Page 41
PUMP END DISASSEMBLY AND
REASSEMBLY
SF SERIES X‐PROOF PUMPSOM-06629
Review all SAFETY information in Section A.
This manual will alert personnel to known proce
dures which require special attention, to those
which could damage equipment, and to those
which could be dangerous to personnel. However,
this manual cannot possibly anticipate and provide
detailed precautions for every situation that might
occur during maintenance of the unit. Therefore, it
is the responsibility of the owner/maintenance per
sonnel to ensure that only safe, established main
tenance procedures are used, and that any proce
dures not addressed in this manual are performed
only after establishing that neither personal safety
nor pump integrity are compromised by such prac
tices.
Do not attempt to service the pump as
sembly unless all power to the motor
has been shut off at the control box;
otherwise, injury or death could result.
If the pump is used to handle liquids
which may cause illness or disease
through direct exposure, take neces
sary precautions during maintenance
and repair to prevent personal contam
ination.
Select a suitable location, preferably indoors, to
perform required maintenance. All work must be
performed by qualified personnel.
Check the chart in TROUBLESHOOTING, Section
D of this manual, to determine the nature of the
pump problem. If the problem is mechanical in na
ture, such as worn pump parts, seal replacement,
lubrication, etc., refer to the following instructions.
If the problem is electrical, maintenance may be
performed only by a Gorman‐Rupp authorized re
pair facility, or the factory. Otherwise, the pump
warranty will be negated, and damage to the
pump, and injury or death to personnel can result.
Contact the factory for the authorized repair facility
closest to you.
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. Do not attempt to
lift this pump by the motor or control
cables, or the piping. Attach proper lift
ing equipment to the lifting bail fitted on
the pump. Lift the pump or component
only as high as necessary and keep per
sonnel away from suspended objects.
The electrical power used to operate
this pump is high enough to cause inju
ry or death. Make certain that the control
handle on the control box is in the off po
sition and locked out, or that the power
supply to the control box has been
otherwise cut off and locked out, before
attempting to open or service the pump
assembly. Tag electrical circuits to pre
vent accidental start‐up.
Carefully inspect any O‐rings before removal and
cleaning to determine if a proper seal and com
pression existed prior to disassembly. If sealing
was faulty or questionable, the cause must be de
termined and corrected before reassembly. All O‐
rings must be replaced if disturbed.
MAINTENANCE AND REPAIRPAGE E - 18
Page 42
OM-06629SF SERIES X‐PROOF PUMPS
PUMP END DISASSEMBLY
Preparing Pump for Disassembly
Use the hoisting bail to remove the pump from the
wet well or sump, and move it to a suitable location
for disassembly.
If the pump is designed for a guide rail application,
it is not necessary to remove the guide shoe for
most pump maintenance procedures. If removal of
the guide shoe is desired, disengage the hardware
securing the guide shoe to the pump casing and
remove the guide shoe and guide shoe seal.
If the pump is designed for a stand application, dis
engage the hardware securing the pump to the
stand before proceeding with pump maintenance.
Suction Head and Wear Ring Removal
Position the pump horizontally on a flat work sur
face and remove the hardware securing the suc
tion head to the pump casing.
Use a pair of suitable tools to pry the suction head
and assembled wear ring out of the pump casing.
Remove the O‐ring from the outer shoulder of the
seal plate.
Draining Oil From Seal Cavity
The seal cavity oil must be drained to prevent the
oil from escaping as the impeller is removed.
Let the pump cool before removing the
seal cavity drain plug. Pressure built up
within a hot pump could cause the oil to
spray out when the plug is removed. Re
move the plug slowly and permit pressure
to vent to atmosphere.
Lay the pump on its side with one of the pipe plugs
facing up. Clean any dirt from around the plug. Re
move the plug slowly to release any pressure and
install a short pipe nipple in the hole. Roll the pump
and drain the seal oil into a clean container. In
spect the oil for water, dirt, or cloudy condition
which could indicate lower seal failure or poor O‐
ring seal.
Impeller Removal
Inspect the wear ring for excessive wear or scoring.
If replacement is required, install two M12 x 1.75 x
76 mm long capscrews (not supplied) in the
tapped holes in the suction head. Turn the screws
evenly in an alternating sequence to press the
wear ring out of the suction head.
Pump Casing Removal
Position the pump assembly on a flat surface and
use the lifting bail and lifting device to support the
pump in a vertical position. Remove the hardware
securing the motor assembly to the pump casing.
Using the lifting device, raise the motor assembly
out of the pump casing. It may be necessary to tap
around the circumference of the pump casing with
a soft‐faced mallet to break the seal between the
casing and motor. When the motor is free of the
pump casing, position the motor and remaining
pump end components horizontally on a flat sur
face for further disassembly. Chock the pump to
prevent rolling when positioned horizontally.
Wedge a soft metal rod between the impeller vanes
to prevent impeller rotation.
NOTE
A strap wrench may also be used to immobilize the
impeller.
Remove the impeller capscrew. A hex key used in
conjunction with an impact wrench can also be
used to remove the impeller screw.
Remove the impeller washer. Remove the metal
rod or strap wrench used to immobilize the im
peller.
To remove the impeller, use two thin‐bladed screw
drivers positioned 180_ apart to pry on the back of
the impeller and “walk” the impeller off the shaft.
Use increasingly larger screwdrivers (or wedges)
as necessary. After the impeller comes free of the
shaft, retain the impeller key.
Remove the impeller adjusting shims. Tie and tag
the shims for ease of reassembly.
PAGE E - 19MAINTENANCE AND REPAIR
Page 43
SF SERIES X‐PROOF PUMPSOM-06629
If no further disassembly is required, proceed to
the appropriate areas in PUMP END REASSEMB
LY.
Seal Removal
Carefully remove the spring retainer (if so
equipped) and seal spring. Slide the shaft sleeve
and rotating portion of the seal off the shaft as a
unit.
Apply oil to the sleeve and work it up under the rub
ber bellows. Slide the rotating portion of the seal off
the shaft sleeve.
Work a pair of stiff wires with hooked ends between
the rotor shaft and the stationary seat and pull the
stationary seat and O‐ring out of the seal plate.
NOTE
An alternate method of removing the stationary ele
ment is to remove the screws securing the seal
plate to the motor assembly. Pry the assembled
seal plate and stationary element off the shoulder of
the intermediate. Remove the O‐ring and press the
stationary element and seat out of the seal plate
from the back side.
Remove the seal sleeve O‐ring from the rotor shaft.
With the pump inverted, stuff a clean tissue into the
stationary seal seat bore of the intermediate or
wrap a small rag around the shaft to prevent for
eign material from entering the motor cavity.
Carefully inspect any O‐rings before removal and
cleaning to determine if a proper seal existed prior
to disassembly. If sealing was faulty or question
able, the cause must be determined and corrected
before reassembly. Replace any parts as required.
Thoroughly clean all reuseable parts with a soft
cloth soaked in cleaning solvent. Remove all O‐
rings and clean the sealing surfaces.
DRYLUBRICATED
FT. LBS.NM
FT. LBS.NM
PUMP END REASSEMBLY
NOTE
Reuse of old O‐rings or shaft seal parts will result in
premature leakage or reduced pump performance.
It is strongly recommended that new O‐rings and a
new shaft seal be used during reassembly (see the
parts lists for part numbers).
Hardware Torque Values
When reassembling the pump, use the following
table to determine the proper torque values for
hardware.
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 rotor shaft for damaged threads, scor
ing, or nicks. Remove nicks and burrs with a fine
file or hand honing stone to restore original con
tours. If the shaft is bent or severely damaged, the
motor must be replaced.
The shaft seal assembly should not be reused be
cause wear patterns on the finished faces cannot
MAINTENANCE AND REPAIRPAGE E - 20
Page 44
OM-06629SF SERIES X‐PROOF PUMPS
be realigned during reassembly. This could result
in premature failure.
Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate the preci
sion 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
STATIONARY
SEAL SEAT
SHAFT SLEEVE
BELLOWS AND
RETAINER ASSY
tissue. Wipe lightly in a circular pattern to avoid
scratching the faces.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak
age. If any components are worn, replace the com
plete seal; never mix old and new seal parts.
Install the shaft seal as shown in the following illus
tration.
SHAFT SLEEVE
O‐RING
SEAL PLATE
O‐RING
ROTATING
ELEMENT
SPRING
SHIM SET
Figure E-2. Lower Seal Assembly
The seal assembly is not designed for op
eration at temperatures above 104_F
(40_C). Do not use at higher operating
temperatures.
Seal Installation
Thoroughly clean the O‐ring surfaces and seal
bore of the seal plate. The seal bore must be free of
burrs and nicks which could damage the seal. In
spect the seal plate for cracks, distortion, or ero
sion and replace it if defective.
Lubricate the seal sleeve O‐ring with light oil and
slide it onto the rotor shaft until it is seated against
the shaft shoulder. Use caution not to nick or dam
age the O‐ring on the shaft keyway.
SPRING
RETAINER
(IF SO EQUIPPED)
IMPELLER
Position the seal plate on a clean flat surface with
the impeller side up.
Unpack the seal stationary seat and O‐ring. Apply
a light coating of oil to the seal plate bore and the
O.D. of the stationary seat O‐ring. Keep the sealing
face dry.
Position the stationary seat and O‐ring in the seal
plate bore with the sealing face up and cover the
seal face with a clean tissue. Use your thumbs to
press the assembly into the bore. Apply equal
pressure on opposite sides until the seat contacts
the bore shoulder. Remove the tissue and inspect
the seal face to ensure that it is clean and dry. If
cleaning is necessary, use clean tissue to wipe
lightly in a circular pattern.
NOTE
If the seal plate was not removed during disassem
bly, cover the stationary element with a clean tissue
and use your thumbs to press the seal stationary
seat and O‐ring into the seal plate as described
PAGE E - 21MAINTENANCE AND REPAIR
Page 45
SF SERIES X‐PROOF PUMPSOM-06629
above. Remove the tissue and inspect the seal face
to ensure that it is clean and dry.
Install a new O‐ring on the shoulder of the interme
diate.
Carefully position the seal plate and stationary seal
components on the rotor shaft. Align the holes in
the seal plate for the capscrews with those in the
intermediate and slide the seal plate onto the shaft
until fully seated against the intermediate. Be careful not to damage the stationary seat already
installed in the seal plate. Secure the seal plate to
the intermediate with the flat head capscrews.
Unpack the rotating portion of the seal. Be certain
the seal face of the rotating element is free of grit or
surface damage. Because the rotating element
may not stay in the bellows retainer when turned
upside down, place a small amount of grease at
equal spaces on the back of the element and posi
tion it in the bellows retainer. The grease should
hold the element in position until the seal is in
stalled. Assemble the drive grooves of the rotating
element into the drive lugs of the bellows retainer.
Lubricate the I.D. of the bellows with water and
slide the rotating subassembly over the shaft
sleeve until the seal face is just flush with the under
cut end of the sleeve.
Slide the assembled shaft sleeve and rotating por
tion of the seal and onto the rotor shaft until the pol
ished faces contact. Continue to push the sleeve
through the seal until it is fully seated against the
shaft shoulder.
Install the seal spring over the bellows retainer and
install the spring retainer (if so equipped). See Fig
ure E-2 for proper order of seal assembly.
shaft until seated firmly against the impeller shim
set. If your pump is not equipped with a spring re
tainer, make sure the seal spring seats squarely
over the shoulder on the back of the impeller.
A clearance of .020 to .040 inch (0,51 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.
After the impeller is installed, coat the threads of
the rotor/shaft or impeller capscrew with `Loctite
Threadlocker No. 242' or equivalent compound.
Install the impeller washer. Wedge a soft metal bar
between the vanes of the impeller or use a strap
wrench to prevent shaft rotation. Torque the im
peller nut or capscrew to the value shown in Table
E-1.
Remove the metal bar or strap wrench used to pre
vent shaft rotation and turn the impeller to check for
free rotation.
Suction Head and Wear Ring Installation
The suction head and wear ring must be installed
in the pump casing before installing the pump cas
ing in order to set the impeller‐to‐wear ring clear
ance.
If the wear ring was removed from the suction
head, position the replacement wear ring in the
suction head bore and use an arbor (or hydraulic)
press to press the wear ring into the suction head
until fully seated.
Install a new O‐ring on the shoulder of the suction
head. Position the suction head against the pump
casing and use the previously removed hardware
to press the suction head into the pump casing.
Impeller Installation
Inspect the impeller for cracks, broken vanes, or
wear from erosion and replace it if damaged. Clean
the threads on the rotor shaft for the impeller nut.
Install the same thickness of adjusting shims as
previously removed. Install the impeller key in the
rotor shaft keyway. Align the keyway in the impeller
with the shaft key and push the impeller onto the
Adjust the impeller‐to‐wear ring clearance after
installing the pump casing as described below.
Pump Casing Installation
Install a new O‐ring on the shoulder of the seal
plate. Slide the pump casing over the seal plate
shoulder until fully seated. Apply “Never‐Seez” or
equivalent compound to the capscrews and se
cure the pump casing to the seal plate and motor
assembly with the previously removed hardware.
MAINTENANCE AND REPAIRPAGE E - 22
Page 46
OM-06629SF SERIES X‐PROOF PUMPS
Torque the capscrews to the value shown in Table
E-1.
Impeller Face Clearance Adjustment
A clearance of .006 to .012 inch (15 to 30 mm) be
tween the face of the impeller and the wear ring is
recommended for maximum pump efficiency.
Loosen the capscrews securing the pump casing
to the motor assembly. Measure the clearance be
tween the impeller and wear ring. If the clearance is
too narrow, turn the adjusting screws in an alternat
ing pattern to push the pump casing and suction
head away from the impeller until the proper clear
ance is achieved. If the clearance is too wide, use
the previously removed hardware to draw the
pump casing and suction head toward the impeller
until the proper clearance is achieved.
When the face clearance is properly set, secure the
adjusting screws by tightening the jam nuts
against the back of the seal plate.
Final Assembly
If the pump is designed for guide a rail application
and guide shoe was removed for disassembly,
install a new guide shoe seal and secure the seal
and guide shoe to the pump casing with the pre
viously removed hardware.
If the pump is designed for a stand application, se
cure the pump to the stand with the previously re
move hardware.
Use a suitable lifting device to reposition the pump
in the wet well or sump.
LUBRICATION
Seal Cavity
Before installing or removing the lubrica
tion plugs, always make sure the pump is
completely cool, and clean the area
around the plugs to prevent contamination
of the oil.
Check the oil level in the seal cavity before initial
startup, after the first two weeks of operation, and
every month thereafter.
Check the oil level only when the pump
is cool. If the oil level plug is removed
when the pump is hot, pressure in the
seal cavity can cause hot oil to be
ejected as the plug is removed.
Remove the lubrication plugs as indicated in
Draining Oil. Position the pump upright and add
premium quality submersible pump oil through
one of the plug holes until the oil reaches the bot
tom of the plug hole. Clean and re‐install the plugs.
The grade of lubricant used is critical to the opera
tion of this pump. Use premium quality hydraulic oil
as specified in Table E-2.
PAGE E - 23MAINTENANCE AND REPAIR
Page 47
SF SERIES X‐PROOF PUMPSOM-06629
Table E-2. Pump Oil Specifications
Specifications:
TypePremium high viscosity index, anti‐wear hydraulic oil..............................
Viscosity @ 100_F (38_C)110 to 155...............................................
Viscosity @ 210_F (99_C)40 to 50..................................................