GORMAN-RUPP SM SERIES Installation and operating instructions

OM-06520-02
November 11, 2013
ACU
THE GORMAN‐RUPP COMPANY DMANSFIELD, OHIO
www.grpumps.com
GORMAN‐RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
e2013 The Gorman‐Rupp Company
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
SM SERIES PUMPS
MODELS
SM3C65-X6
ALL VOLTAGES

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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:

TABLE OF CONTENTS
i
INTRODUCTION PAGE I - 1.................................................
SAFETY - SECTION A PAGE A - 1...........................................
INSTALLATION - SECTION B PAGE B - 1....................................
RETAINING “PERMISSIBILITY” PAGE B - 1..............................................
GORMAN‐RUPP MSHA PUMP INSPECTION FORM PAGE B - 2............................
Pump Model Designation PAGE B - 3...............................................
PREINSTALLATION INSPECTION PAGE B - 3............................................
Lubrication PAGE B - 3............................................................
PUMP INSTALLATION PAGE B - 4......................................................
Pump Specifications PAGE B - 4....................................................
Pump Dimensions PAGE B - 4.....................................................
Lifting PAGE B - 5.................................................................
Positioning the Pump PAGE B - 5...................................................
PIPING PAGE B - 6...................................................................
CONTROL BOX PAGE B - 6...........................................................
Enclosure PAGE B - 6.............................................................
Grounding Methods PAGE B - 10....................................................
Field Wiring Connections (Incoming Power) PAGE B - 11...............................
Pump Power Cable Connections PAGE B - 12.........................................
LIQUID LEVEL CONTROL PAGE B - 13..................................................
OPERATION - SECTION C PAGE C - 1......................................
CONTROL BOX FUNCTION PAGE C - 1.................................................
Component Function PAGE C - 1...................................................
PUMP OPERATION PAGE C - 1........................................................
Liquid Temperature And Overheating PAGE C - 2.....................................
Checking Pump Rotation PAGE C - 2...............................................
STARTING PAGE C - 3................................................................
STOPPING PAGE C - 3................................................................
OPERATIONAL CHECKS PAGE C - 4...................................................
COLD WEATHER PRESERVATION PAGE C - 4...........................................
LUBRICATION PAGE C - 4.............................................................
Draining Oil PAGE C - 4...........................................................
Condition of Oil PAGE C - 4........................................................
Adding Oil PAGE C - 4............................................................
TROUBLESHOOTING - SECTION D PAGE D - 1..............................
ELECTRICAL TESTING PAGE D - 2.....................................................
Test Equipment PAGE D - 3........................................................
Voltage Imbalance PAGE D - 3.....................................................
Motor And Motor Power Cable Continuity PAGE D - 3.................................
Insulation Resistance PAGE D - 4...................................................
PUMP MAINTENANCE AND REPAIR - SECTION E PAGE E - 1................
STANDARD PERFORMANCE CURVE PAGE E - 1........................................
PARTS LISTS
Pump Model PAGE E - 3..........................................................
Submersible Motor Assemblies PAGE E - 5..........................................
PUMP END DISASSEMBLY PAGE E - 6.................................................

TABLE OF CONTENTS
(continued)
ii
Strainer and Suction Head Removal PAGE E - 7......................................
Draining Oil From Seal Cavity PAGE E - 7............................................
Positioning Pump For Disassembly PAGE E - 7.......................................
Impeller Removal PAGE E - 7......................................................
Lower Seal Removal PAGE E - 7....................................................
Upper Seal Removal PAGE E - 8...................................................
PUMP END REASSEMBLY PAGE E - 8..................................................
Cleaning And Inspection Of Pump Parts PAGE E - 8..................................
Upper Seal Installation PAGE E - 9..................................................
Seal Plate Installation PAGE E - 10...................................................
Lower Seal Installation PAGE E - 11..................................................
Impeller Installation PAGE E - 12.....................................................
Strainer Installation PAGE E - 12.....................................................
MOTOR DISASSEMBLY PAGE E - 12....................................................
Terminal Housing And Power Cable Removal And Disassembly PAGE E - 13..............
Shaft and Rotor Removal PAGE E - 13...............................................
Stator Removal PAGE E - 14........................................................
MOTOR REASSEMBLY PAGE E - 14.....................................................
Stator Installation PAGE E - 15......................................................
Shaft And Rotor Installation PAGE E - 15.............................................
Terminal Housing And Power Cable Reassembly And Installation PAGE E - 16............
FINAL ASSEMBLY PAGE E - 18.........................................................
LUBRICATION PAGE E - 18.............................................................
Seal Cavity PAGE E - 18............................................................
Pump Oil Specifications PAGE E - 19.................................................
Motor Bearings PAGE E - 19........................................................

SM SERIES OM-06520
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.
This pump is an S Series model. The basic material
of construction is CD4MCu stainless steel, with 316
stainless steel rotor shaft, motor housing and hard
ware. The pump is designed to handle industrial
chemical and low pH resistance materials. The in
tegral electric motor must be operated through the
control box furnished with the pump as standard
equipment. The pump and control comply with
MSHA schedule 2G regulations, and have been
approved for use in hazardous locations by the
Pennsylvania Department of Environmental Re
sources (D.O.E.R.).
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.
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]
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.

SM SERIES OM-06520
PAGE A - 1SAFETY
SAFETY - SECTION A
This information applies to SM Series
submersible motor driven pumps.
Because pump installations are seldom
identical, this manual cannot possibly
provide detailed instructions and pre
cautions for each specific application.
Therefore, it is the owner/installer's re
sponsibility to ensure that applications
not addressed in this manual are per
formed only after establishing that nei
ther operator safety nor pump integrity
are compromised by the installation.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man
ual.
2. Lock out incoming power to the
control box to ensure that the
pump will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Close the discharge valve (if
used).
The pump is designed to be operated
through the control box furnished with
the pump. The control box provides
overload protection and power control.
Do not connect the pump motor directly
to the incoming power lines.
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. Make certain that the
pump and enclosure are properly
grounded. Be sure that the incoming
power matches the voltage and phase
of the pump and control before connect
ing the power source. Do not run the
pump if the voltage is not within the lim
its.
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.
All electrical connections must be in ac
cordance with MSHA Schedule 2G. If
there is a conflict between the instruc
tions provided and MSHA specifica
tions, MSHA specifications shall take
precedence. All electrical equipment
supplied with this pump was in confor
mance with MSHA requirements in ef
fect on the date of manufacture. Failure
to follow applicable specifications, or
substitution of electrical parts not
supplied or approved by the manufac
turer, can result in severe injury or
death.
This pump is not designed to pump vol

SM SERIESOM-06520
PAGE A - 2 SAFETY
atile, explosive, or flammable materials.
Refer to the chart in Installation, Section
B for the basic materials of construction
for each pump covered in this manual.
Do not attempt to pump any liquids for
which your pump is not approved, or
which may damage the pump or endan
ger personnel as a result of pump fail
ure. Consult the factory for specific
application data.
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.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are secure before op
eration.
Approach the pump cautiously after it
has been running. Although the motor is
cooled by the liquid being pumped, nor
mal operating temperatures can be high
enough to cause burns. The tempera
ture will be especially high if operated
against a closed discharge valve. Never
operate against a closed discharge
valve for long periods of time.
Do not open the control box in an explo
sive atmosphere. When sealed, the con
trol box is explosion proof to prevent the
ignition of combustible gases. Opening
the box in an explosive atmosphere
could result in fire or explosion.

OM-06520SM SERIES
PAGE B - 1INSTALLATION
INSTALLATION - SECTION B
Review all SAFETY information in Section A.
This section is intended only to summarize recom
mended installation practices for the pump and
control box. If there are any questions concerning
your specific application, contact your Gor
man‐Rupp distributor or the Gorman‐Rupp Com
pany
All functions performed by the customer on the
pump or control must be done in accordance with
MSHA schedule 2G regulations to ensure the ex
plosion‐proof integrity. No alterations of original
design may be made without the consent of the
Gorman‐Rupp Company and MSHA.
To retain “Permissibility” of this equipment,
the following conditions shall be satisfied:
1. GENERAL SAFETY. FREQUENT INSPECTION
SHALL BE MADE. ALL ELECTRICAL PARTS,
INCLUDING THE PORTABLE CABLE AND WIR
ING, SHALL BE KEPT IN A SAFE CONDITION.
THERE SHALL BE NO OPENINGS INTO THE
CASINGS OF THE ELECTRICAL PARTS. A
PERMISSIBLE DISTRIBUTION BOX SHALL BE
USED FOR CONNECTION TO THE POWER
CIRCUIT UNLESS CONNECTION IS MADE IN
FRESH INTAKE AIR. THE MACHINE FRAME
SHALL BE EFFECTIVELY GROUNDED. THE
POWER WIRES SHALL NOT BE USED FOR
GROUNDING. THE OPERATING VOLTAGE
MUST MATCH THE VOLTAGE RATING OF THE
MOTOR(S) 10%.
2. SERVICING. EXPLOSION PROOF ENCLO
SURES SHALL BE RESTORED TO THE STATE
OF ORIGINAL SAFETY WITH RESPECT TO ALL
FLAME ARRESTING PATHS, LEAD EN
TRANCES, ETC., FOLLOWING DISASSEMBLY
FOR REPAIR OR REBUILDING, WHETHER BY
THE OWNER OR AN INDEPENDENT SHOP.
3. FASTENING. ALL BOLTS, NUTS, SCREWS,
AND OTHER MEANS OF FASTENING, AND
ALSO THREADED COVERS, SHALL BE IN
PLACE, PROPERLY TIGHTENED AND SE
CURED.
4. RENEWALS AND REPAIRS. INSPECTIONS,
REPAIRS, OR RENEWALS OF ELECTRICAL
PARTS SHALL NOT BE MADE UNLESS THE
PORTABLE CABLE IS DISCONNECTED FROM
THE CIRCUIT FURNISHING POWER, AND THE
CABLE SHALL NOT BE CONNECTED AGAIN
UNTIL ALL PARTS ARE PROPERLY REASSEM
BLED. SPECIAL CARE SHALL BE TAKEN IN
MAKING RENEWALS OR REPAIRS. LEAVE NO
PARTS OFF. USE REPLACEMENT PARTS EX
ACTLY LIKE THOSE FURNISHED BY THE
MANUFACTURER. WHEN ANY LEAD EN
TRANCE IS DISTURBED, THE ORIGINAL
LEADS OR EXACT DUPLICATES THEREOF
SHALL BE USED AND STUFFING BOXES
SHALL BE REPACKED IN THE APPROVED
MANNER.
5. CABLE REQUIREMENTS. A FLAME RESIS
TANT PORTABLE CABLE BEARING A MSHA 
ASSIGNED IDENTIFICATION NUMBER, ADE
QUATELY PROTECTED BY AN AUTOMATIC
CIRCUIT INTERRUPTING DEVICE, SHALL BE
USED. SPECIAL CARE SHALL BE TAKEN IN
HANDLING THE CABLE TO GUARD AGAINST
MECHANICAL INJURY AND WEAR. SPLICES
IN PORTABLE CABLES SHALL BE MADE IN A
WORKMANLIKE MANNER, MECHANICALLY
STRONG, AND WELL INSULATED. ONE TEM
PORARY SPLICE MAY BE MADE IN ANY TRAIL
ING CABLE. SUCH TRAILING CABLE MAY
ONLY BE USED FOR THE NEXT 24 HOUR PE
RIOD. NO TEMPORARY SPLICE SHALL BE
MADE IN A TRAILING CABLE WITHIN 25 FEET
OF THE MACHINE, EXCEPT CABLE REEL
EQUIPMENT. CONNECTIONS AND WIRING
TO THE OUTBY END OF THE CABLE SHALL
BE IN ACCORDANCE WITH RECOGNIZED
STANDARDS OF SAFETY.

OM-06520 SM SERIES
PAGE B - 2 INSTALLATION
GORMAN-RUPP MSHA PUMP INSPECTION FORM
INSPECTOR____________________________ DATE____________
MODEL NO.____________________________ SERIAL NO.____________
UNIT ELECTRICAL RATING:
H.P.________, VOLTS________, PUMP AMPS________, HERTZ________
STARTER X/P NO: XP3026-1 (CONTROL WITHOUT FLOAT)
OR
18-XPA040007-0 (CONTROL WITH FLOAT)
MOTOR CABLE:
___No. 12; 7 Conductor; Type SPC; .89 + .03 O.D.; Heavy Jacketed; Royal – MSHA 122;
___No. 8; 9 Conductor; Type SPC; 1.05 + .03 O.D.; Heavy Jacketed; Royal – MSHA 122;
___No. 6; 9 Conductor; Type SPC; 1.25 + .04 O.D.; Heavy Jacketed, Royal – MSHA 122;
Length______________________
ITEM AREA OF INSPECTION ACC. REJ. CORRECTED
1. Are lock washers (or equivalent) provided for all ex
plosion proof enclosure fastenings?
2. Are all plane joints securely fastened so that a
.005-inch feeler gauge cannot be inserted?
3. Is motor plug secured with lock clip?
4. Are all electrical connections secure?
5. Are all electrical connections insulated where neces
sary and per appropriate drawing?
6. Are packing glands properly packed so that
1/8-inch clearance remains between packaging nut
and stuffing box?
7. Are packing nut and cable grip secured with lock
wire and lead seal?
8. Was pump leak tested?
9. Was pump and control electrically tested?
10. Was pump water tested?
11. Are pump, cable, and control assembled together
properly per appropriate drawing?
Comments:
NOTE: Fill out form completely and “rejections” must be corrected and re-inspected. Inspec
tor must initial and date when corrective action was taken. 10/9/87
Form CD GL-02128 Rev 6/05
Doc# 152708
This form not to be revised
without approval of MSHA.

OM-06520SM SERIES
PAGE B - 3INSTALLATION
Pump Model Designation
Following is a description of the model numbering
system for SM Series pumps. These submersible
pumps are available in a range of sizes. Refer to the
following chart to identify the size for your specific
pump model.
SM
Series
Discharge
Size
Pump
Hydraulics
Pump
Construction
H.P.
(If Shown)
Voltage/Phase
3 C 1 460/3- X6
Pump Model
Review all SAFETY information in Section A.
This section is intended only to summarize recom
mended installation practices for the pump and
control box. If there are any questions concerning
your specific application, contact your Gor
man‐Rupp distributor or the Gorman‐Rupp Com
pany.
PREINSTALLATION INSPECTION
The pump and control box were inspected and
tested before shipment from the factory. Before in
stallation, inspect the pump for damage which may
have occurred during shipment. Check as follows:
a. Inspect the pump assembly for cracks, dents,
damaged threads, and other obvious dam
age.
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. The standard pump is furnished with 50 feet
(15,2 m) of power cable. Inspect the cable for
cuts or damage.
d. Inspect the control box for cracks, dents, and
other obvious damage.
e. Check that all control box components are se
curely attached to their mounting surfaces,
and that the electrical connections are tight
and free of corrosion.
f. Compare the amperes, phase, voltage and
hertz indicated on the motor nameplate to the
ratings indicated for the control box.
g. Carefully read all tags, decals, and markings
on the pump assembly and the control box,
and perform all duties as indicated.
h. Check the pump and motor for any oil leaks.
An oil leak may indicate a cut O ring or other
damage.
i. If the pump and control box 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.
Lubrication
This pump series utilizes one lubrication cavity, lo
cated just behind the seal plate. It is filled with pre
mium quality submersible pump oil which lubri
cates two shaft seals. The motor operates in air
and requires no lubrication.
The lower shaft seal prevents liquid from entering
the lubrication cavity, while the upper shaft seal
prevents oil leakage into the motor. The upper seal
also acts as backup protection in the event of lower
seal failure.
The lubrication cavity was fully lubricated when
shipped from the factory. Check the oil level before
installing the pump (see LUBRICATION in MAIN
TENANCE AND REPAIR). An additional quart of
oil has been provided with the pump to “top off” the
oil cavity. If the oil level is abnormally low, deter
mine the cause before putting the pump into serv
ice.