GORMAN-RUPP PUMPS S2D3A User manual

OM-01690---04
October 28, 2003
Rev. A 11-19-03
ACDEGH
THE GORMAN-RUPP COMPANY DMANSFIELD, OHIO
GORMAN-RUPP OF CANADA LIMITED DST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
www.gormanrupp.com
ECopyright by the Gorman-Rupp Company
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
SSERIESPUMP
MODEL
S2D3A 115V 1P

TABLE OF CONTENTS
i
INTRODUCTION PAGE I --- 1.................................................
SAFETY - SECTION A PAGE A --- 1............................................
INSTALLATION --- SE CTION B PAGE B --- 1....................................
GENERAL INFORMATION PAGE B --- 1..................................................
PREINSTALLATION INSPECTION PAGE B --- 1............................................
PUMP SEAL PAGE B --- 1..............................................................
LUBRICATION PAGE B --- 1.............................................................
PUMP INSTALLATION PAGE B --- 2......................................................
Pump Motor Specifications PAGE B --- 2..............................................
Pump Dimensions PAGE B --- 2.....................................................
Lifting PAGE B --- 2.................................................................
Positioning the Pump PAGE B --- 2...................................................
Piping PAGE B --- 3................................................................
ELECTRICAL CONNECTIONS PAGE B --- 3...............................................
Grounding Methods PAGE B --- 4....................................................
Pump Power Cable Connections PAGE B --- 5.........................................
OPERAT ION --- SECTION C PAGE C --- 1......................................
GENERAL INFORMATION PAGE C --- 1..................................................
Pump Performance PAGE C --- 1.....................................................
Pump Controls PAGE C --- 1........................................................
PUMP OPERATION PAGE C --- 1........................................................
Liquid Temperature and Overheating PAGE C --- 1.....................................
Impeller Rotation PAGE C --- 2.......................................................
STARTING, STOPPING, AND OPERATIONAL CHECKS PAGE C --- 3.........................
Starting And Stopping PAGE C --- 3..................................................
Operational Checks PAGE C --- 3....................................................
LIQUID LEVEL 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 --- 5............................................................
TROUBLESHOOTING --- SECTION D PAGE D --- 1..............................
ELECTRICAL TESTING PAGE D --- 2.....................................................
Test Equipment PAGE D --- 2........................................................
Voltage Imbalance PAGE D --- 3.....................................................
Motor And Motor Power Cable Continuity PAGE D --- 3.................................
Insulation Resistance PAGE D --- 3...................................................
Capacitor PAGE D --- 4.............................................................
Wiring Diagram PAGE D --- 4........................................................
PUMP MAINTENANCE AND REPAIR - SECTION E PAGE E --- 1.................
STANDARD PERFORMANCE CURVE PAGE E --- 1........................................
PUMP MODEL S2D3A 115V 1P PARTS LIST PAGE E --- 3..................................
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E --- 4.........................

TABLE OF CONTENTS
(continued)
ii
PUMP END DISASSEMBLY PAGE E --- 4.................................................
Strainer And Impeller Cover Removal PAGE E --- 5.....................................
Draining Oil From Seal Cavity PAGE E --- 5............................................
Positioning Pump For Disassembly PAGE E --- 5.......................................
Impeller Removal PAGE E --- 5......................................................
Seal Removal PAGE E --- 5..........................................................
PUMP END REASSEMBLY PAGE E --- 6..................................................
Cleaning And Inspection Of Pump Parts PAGE E --- 6..................................
Seal Installation PAGE E --- 6........................................................
Impeller Installation PAGE E --- 8.....................................................
Impeller Clearance PAGE E --- 8.....................................................
Strainer Installation PAGE E --- 8....................................................
MOTOR DISASSEMBLY PAGE E --- 9....................................................
Head And Power Cable Removal PAGE E --- 9.........................................
Rotor And Shaft Removal PAGE E --- 10...............................................
Bearing Removal PAGE E --- 10.......................................................
Centrifugal Contact Switch Removal PAGE E --- 10......................................
Stator Removal PAGE E --- 10........................................................
MOTOR REASSEMBLY PAGE E --- 11.....................................................
Stator Installation PAGE E --- 11......................................................
Centrifugal Contact Switch Installation PAGE E --- 12....................................
Bearing Installation PAGE E --- 12.....................................................
Rotor And Shaft Installation PAGE E --- 13.............................................
Head And Power Cable Installation PAGE E --- 13.......................................
VACUUM/PRESSURE TESTING PAGE E --- 14.............................................
LUBRICATION PAGE E --- 15.............................................................
Seal Cavity PAGE E --- 15............................................................
Motor Cavity PAGE E --- 15...........................................................

SSERIESPUMP OM--01690
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 Installation, Operation, and Mainte-
nance manual isdesigned tohelp you achievethe
best performance and longest life from your Gor-
man-Rupp pump.
This is an S Series submersible pump. The basic
material of construction is cast iron, with stainless
steel hardware and fittings. The pump is light
weight and portable, making it ideally suited to
many domestic and industrial applications where
low capacity dewatering or irrigation is required.
The pump is powered by an integral, thermally-
protected electric motor which is not explosion-
proof. The pump may be operated fully or partially
submerged. Do not operate the pump in a hazard-
ous atmosphere.
Pump motor maintenance may be performedonly
by a Gorman-Rupp authorized repair facility, orthe
factory. Otherwise, the pump warranty will be ne-
gated, and damage to the pump, and injury or
death to personnel can result. Contact the factory
for the authorized repair facility closest to you.
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
neitheroperatorsafetynorpumpintegrityarecom-
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
write:
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 personnel to procedures which require special attention, to
those which could damage equipment, and to those which could be dangerous to personnel:
Immediate hazards whichWILL 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.
HazardsorunsafepracticeswhichCOULD
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.

SSERIESPUMP OM--01690
SAFETY PAGE A -- 1
SAFETY --- SECTION A
This information applies to the S 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.
Beforeattemptingtoopenorservicethe
pump:
1. Familiarize yourself with this man-
ual.
2. Unplugthepowercablefromitsre-
ceptacle to ensure that the pump
will remain inoperative.
3. Allow the pump to completely cool
if overheated.
5. Close the discharge valve (if
used).
This pump is not designed to pump vol-
atile,explosive,orflammablematerials.
Do not attempt to pump any liquids for
which you 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 ap-
plication data.
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Make certain that the power
cable receptacle is properly grounded
before installation.
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Make certain that the plug
on the pump power cable is discon-
nected from its receptacle before ser-
vicing.
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Obtain the services of a
qualified electrician to make all electri-
cal connections.
Never attempt to alter the length or re-
pair any power cable with a splice. The
pump motor and cable must be com-
pletely waterproof. Injury or death may
result from alterations.
Allelectrical connectionsmustbe inac-
cordance with The National Electric
Code and all local codes. If there is a
conflict between the instructions pro-
vided and N.E.C. Specifications, N.E.C.
Specifications shall take precedence.
All electrical equipment supplied with
this pump was in conformance with
N.E.C. requirements in effect on the

OM--01690 SSERIESPUMP
PAGE A -- 2 SAFETY
date of manufacture. Failure to follow
applicable specifications, or substitu-
tion of electrical parts not supplied or
approved by the manufacturer, can re-
sult in severe injury or death and void
warranty.
Afterthepumphasbeeninstalled,make
certain that the pump and all piping or
hoseconnections are secure beforeop-
eration.
Obtain the services of a qualified elec-
trician to troubleshoot, test and/or ser-
vice the electrical components of this
pump.
Donotattempttoliftthepumpbythe
motor power cable or discharge hose.
Attach proper lifting equipment to the
lifting device fitted to the pump.
Pumps and related equipment must be
installed and operated according to all na-
tional, local and industry standards.

OM--01690 SSERIESPUMP
PAGE B -- 1
INSTALLATION
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 generalrec-
ommendations and practices required to inspect,
position,andarrangethepumpandpiping.Ifthere
are any questions concerning your specific instal-
lation, contact your Gorman-Rupp distributor or
the Gorman-Rupp Company.
Nuts, bolts and screws used on this pump
are metric and do not matchstandardSAE
measurement threads. If any threaded
hardware is replaced, it must be replaced
with metric type. Attempting to force in a
fastener with SAE threads will damage the
mating threads. An optional discharge
adaptor is available to convert the metric
pipe threads in the discharge flange to the
SAE threads.
PREINSTALLATION INSPECTION
The pump assemblywas inspectedand tested be-
fore shipment from the factory. Before installation,
check for damage which may have occurred dur-
ing shipment. Check as follows:
a. Inspectthepumpassemblyforcracks,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 and tighten 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
onthepump,andperformalldutiesindicated.
f. Check for oil leaks. If there is any indication of
an oil leak, see LUBRICATION at the end of
this manual.
g. If the pump has been stored for more than 12
months, some of the components or lubri-
cants may have exceeded their maximum
shelf life. These must be inspected or re-
placed to ensure maximum pump service.
Ifthemaximumshelflifehasbeenexceed,orif
anything appears to be abnormal, contact
your Gorman-Rupp distributor or the factory
to determine the repair or updating policy. Do
not put the pump into service until appropri-
ate action has been taken.
PUMP SEAL
Thepumpisequippedwithasinglefacedsealas-
sembly. It is designed to prevent the liquid being
pumped from entering the lubrication cavity at the
impeller end. A lip seal is used to prevent moisture
or lubrication oil from entering the motor housing
cavity at the motor end.
Thesealislubricatedbypremiumqualitysubmers-
ible pump oil.
LUBRICATION
The pump utilizes one lubrication cavity, located
between the pump casing and the motor housing.
It is filled with premium quality submersible pump
oilwhichlubricatesthepumpseal.Themotoroper-
ates in and is cooled by air, therefore it requires no
lubrication.
This pump was fullylubricated when shipped from
the factory. However, lubrication levels must be
checked before installing the pump (see LU-
BRICATION in the MAINTENANCE AND REPAIR
MANUAL). If the oil level is abnormally low, deter-
mine the cause before putting the pump into ser-
vice.
Refer to Table B-2 for the oil capacity and position
for filling the seal cavity in the pump. Refer to LU-
BRICATION, Section C for lubrication specifica-
tions and intervals.

SSERIESPUMPS OM--01690
PAGE B -- 2 INSTALLATION
PUMP INSTALLATION
Pump Motor Specifications
See Tables B-1 and B-2 for pump specifications.
Table B-1. Pump Specifications
Liquid
Level
Control
Locked
Rotor
Amperes
Pump
HP/
KW
Motor
Speed
(RPM)
Full
Load
Amperes
No
Load
Amperes
Discharge
Size
(NPT)
Model Voltage/
Phase
S2D3A 115/1 YES 8.6 1.0 50.61 HP 3450 2INCH
w/BARBED
ADAPTOR
Table B-2. Additional Specifications
Pump
Model Voltage/ Phase
115/1S2D3A
Approximate
Weight -- Lbs. (kg) Oil Capacity
Ounces (Liters) Seal Cavity Filling
Position
(H)orizontal
Pump 50 Ft. Cable Seal
Cavity Motor
Cavity
78 (42) 6 (3) 7 (0,2) H
--- --- ---
When installing or servicing the pump
or controls, follow all requirements for
the installation of wiring or electrical
equipment as outlined in the National
Electric Code. Follow all safety require-
ments.Failuretoobservetheserequire-
ments could result in injury or death to
personnel. NOTE
Refer to the performance curve in Section E, Main-
tenance and Repair when determining the most
efficient piping installation. The recommended
maximum submergence depth is 23 feet. Great-
er depths could result in damage to the pump
Pump Dimensions
For the approximate physical dimensions of your
pump, refer to the pump specification data sheet
or contact your Gorman-Rupp distributor or the
Gorman-Rupp Company.
Lifting
Pump unit weights will vary depending on the
mounting and drive provided. Check the shipping
tagontheunitpackagingfortheactualweight,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.
Donotattempttoliftthepumpbythe
motor power cable or the piping. Attach
proper lifting equipment or a rope to the
lifting device fitted to the pump.
Positioning the Pump
The pump is designed to operate fully or partially
submerged. The rotating parts are oil lubricated,
and the motor is cooled bya constantflow of liquid
or air discharged through internal passages.
The pump will operate if positioned on its side, but
this is not recommended because the motor

OM--01690 SSERIESPUMP
PAGE B -- 3
INSTALLATION
torque could cause the pump to roll during opera-
tion.
The pump should be independently secured and
supported by the lifting device fitted on the pump.
Iftheapplicationinvolvesalotofdebris,protectthe
pump from excessive wear and clogging by sus-
pending it in a perforated barrel or culvert pipe. If
the bottom is heavily sludge-covered, rest the
pump on support blocks or suspend it from a raft
or similar device near the surface of the liquid. See
Figure B-1 for typical pump installations.
All liquid entering the pump must pass through a
strainer screen. Any spherical solids which pass
through the screen will pass through the pump.
BY BAIL IN PERFORATED CULVERT PIPE ON SUPPORTS
Figure B-1. Typical Pump Installations
Piping
Nosuctionpipingis required ina standard installa-
tion. This pump is provided with a suction strainer
to prevent large solids from clogging the impeller.
To determine the size of the discharge connection,
see Table B-1. Either hose or rigid pipe may be
used. To facilitate mobility and maintenance, it is
recommendedthatthedischargelinebefittedwith
a quick disconnect fitting near the pump. The dis-
charge line must be independently supported to
avoid strain and vibration on the pump.
Either hose or rigid pipe may be used to make dis-
charge connections. For maximum pumping ca-
pacity, keep the line as short and straight as pos-
sible. Elbows and fittings used in discharge lines
increase friction loss, minimize their use.
It is recommended that a check valve or throttling
valve be installed in the discharge line tocontrolsi-
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-
tormustbekeptcompletelywaterproof.

SSERIESPUMPS OM--01690
PAGE B -- 4 INSTALLATION
Serious damage to the pump and injury
or death to personnel can result from
any alteration to the cable.
Field Wiring Connections (Incoming Power)
The pump is designed to operate with a 115 volt,
1 phase, 60 hertz power supply. The voltage avail-
able at the motor must be within the range indi-
cated in Table B-3.
To calculate the voltageavailable at the motor, pro-
ceed as follows:
a. Measurethevoltagewhile the pump is oper-
ating atfull capacity. See wiring diagrams at
the end of this section.
b. Next, subtract the motor cable voltage drop
(see Table B-4, Pump Power Cable Specifi-
cations).
c. Do not continue to operate the pump if this
voltage is not within the recommendedlimits.
Obtaintheservices ofa qualifiedelectrician to
determinethecorrectfieldwiringsizeandoth-
er details toensure an adequate voltagesup-
ply to the pump.
Table B-3. Pump Voltage Requirements
NOMINAL
VOLTAGE PHASE MINIMUM
VOLTAGE MAXIMUM
VOLTAGE
1115 110 120
Pump Power Cable Connections
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Obtain the services of a
qualified electrician to make all electri-
cal connections. Make certain that the
pump and receptacle are properly
grounded.
The pump is provided with a 50 ft. (15,2 m) power
cable (see Table B-4 for standard power cable
specifications) with one end wired into the pump
head. The other end terminates in a grounded
power plug. Power to the receptacle must be di-
rected through a fused circuit, and the receptacle
must be controlled by a positive ON/OFF switch.
The use of extension cords is not recommended.
If extension cords are used, they must have three-
wiresinglephase construction and have adequate
carrying capacity for their length.
Never attempt to alter the length or re-
pair any power cable with a splice. The
pump motor and cable must be com-
pletely waterproof. Injury or death may
result from alternations.
Table B-4. Pump Power Cable Specifications
Pump
Model Voltage/ Phase
115/1
A.W.G
Cable
Size
Conductor
Dia.
Inches
(mm)
DC
Resistance
(ohms) at
225_
__
_C(77_
__
_F)
per 1000 ft.
(305 m)
Cable
O.D.
Inches
(mm)
Amp
Rating
(See
Note
Below) Cable
Type
Voltage
Drop
per 100 ft.
(30,5m) at
Max. Load
16 13* SO 7.72S2D3A 0.43 (11) 0.06 (1,5) 4.49
When necessary to service the pump, make cer-
tain the power cable is unplugged from the recep-
tacle.

OM--01690 SSERIESPUMP
PAGE B -- 5
INSTALLATION
Motor Cable Grounding Test
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Make certain that the power
cable receptacle is properly grounded
after installation.
Using a volt-ohm meter, connect one lead to the
motor cable green/yellow ground lead. Connect
theotherleadtoanuninsulatedpointonthepump
body. The test circuit should close.
If the test circuit does not close, there is a defect in
the cable or motor which must be corrected.
Liquid Level Devices
Thepumpisfurnishedwithbuilt-indevicestoauto-
matically regulate liquid level by filling and dewa-
tering. When liquid level reaches the on-point (up-
per) device, the pump will switch on and continue
to run untilliquid level falls below the off-point (low-
er) device.
NOTE
Distilled water or uncontaminated rain water may
fail to provideconductivity necessary to trigger the
automatic liquid level sensing devices built intothe
pump.Ifthisoccurs, groundtheon-pointassembly
to convert the pump to manual operation, and
install a float level control system.
Overheatingwilloccuriftheliquidlevelfalls
below the level required to cool the pump
motor (see LIQUID LEVEL in Operation,
Section C).

SSERIESPUMP OM--01690
PAGE C -- 1
OPERATION
OPERATION --- SECTION C
GENERAL INFORMATION
Review all SAFETY information in Section A.
This pump is designed to handle most
non-volatile, non-flammable liquids. 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 ap-
plication data.
The pump motor and optional accesso-
ries are not designed to be explosion-
proof. Do not operate in an explosive at-
mosphere.
Follow the instructions on all tags, labels and de-
cals attached to the pump.
Pump Performance
Refer to the pump performance curve on page E-1
for the specific performance for your pump.
Pump Controls
The pump is driven by an integral 115 VAC, 60
hertz, 1 phase motor equipped with thermal motor
overheat protection.
When the pump power cable is plugged into an
electrical receptacle, the pump will start and stop
automatically as the liquid level rises and falls.
Short circuit protection for the electricalreceptacle
is provided by a customer-furnished fuse or break-
er within the circuit. If the breaker trips repeatedly,
operational problems exists. See TROUBLE-
SHOOTING,SectionD.
The pump motor is not designed to be
explosion-proof. Do not operate in an
explosive atmosphere.Improperopera-
tioncould result indestruction ofequip-
ment, injury or death to personnel.
See the operating instructions furnished with any
optional accessoriesbefore 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. Unplugthepowercablefromitsre-
ceptacle to ensure that the pump
will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4.Closethedischargevalve(if
used).
5. Refertoinstructionsinthismanual
before restarting the pump.
Do not start the pump more than 6 times
per hour. If the motor does not cool be-
tween starts it will overheat, resulting in
damage to the motor windings.

OM--01690 SSERIESPUMP
PAGE C -- 2 OPERATION
The maximum liquid temperature for this pump is
120_F (490_C).Donotapplyitatahigheroperat-
ing temperature.
Overheating can occurif thepump is made tostart
and stop repeatedly without time to cool off be-
tween starts, the liquid level is allowed to fall too
low to sufficiently cool the motor, or if the circuit
breaker or fuse fails to provide adequate protec-
tion. Operating the pump against a closed dis-
chargevalveforanextendedperiodwillalsocause
the pump to overheat.
Approach the pump cautiously after it
hasbeenrunning.Althoughthemotoris
cooledby the liquidbeing pumped,nor-
maloperating temperaturescanbehigh
enough to cause burns. The tempera-
ture will be especially high if operated
againsta closeddischarge valve.Never
operate against a closed discharge
valve for long periods of time.
If overheating does occur, stop the pump immedi-
ately and allow it to cool before servicing it. Ap-
proach any overheated pump cautiously.
Overheated pumps can cause severe
burnsandinjuries.Ifoverheatingofthe
pump occurs:
1. Stop the pump immediately.
2. Ventilate the area.
3. Allowthepumptocompletelycool.
4. Check the temperature before ser-
vicing.
5. Vent the pump slowly and cau-
tiously
6. Refertoinstructionsinthismanual
before restarting the pump.
Impeller Rotation
Checkimpellerrotationasfollowsbeforeoperation
to ensure thatthe impelleris rotating in the correct
direction.
While checking impeller rotation, secure
thepumptopreventthepowercablefrom
coiling.
Suspend the pump from the lifting device fitted on
the pump.
NOTE
For Autostart models, place a jumper wire across
the on-point and off-point sensing devices before
applying power to check pump rotation.
As viewed from the top, the pump should kick in a
counterclockwise direction; this will indicate that
impeller rotation is correct.
Ifthepumpkicksina clockwise direction,impeller
rotation is incorrect and the pump must be re-
turnedtothefactoryora Gorman-Ruppauthorized
Submersible Repair Center. Remove the jumper
wire.Sincethepumpispoweredbyasingle-phase
motor, the direction of rotation can not be altered
by interchanging motor leads at the control box.

SSERIESPUMP OM--01690
PAGE C -- 3
OPERATION
DIRECTION OF
KICKBACK
AT STARTUP
Figure C-1. Checking Pump Rotation
STARTING, STOPPING, AND
OPERATIONAL CHECKS
Starting And Stopping
Pump operation is controlled by the built-in liquid
sensingdevices. Whenliquid levelreaches theon-
point (upper) device, the pump will switch on and
continue to run until liquid level falls below the off-
point (lower) device.
NOTE
Distilled water or uncontaminated rain water may
fail to provideconductivity necessary to trigger the
automatic liquid level sensing devices built intothe
pump.Ifthisoccurs, groundtheon-pointassembly
to convert the pump to manual operation, and
install a float level control system.
It is recommended that a check valve or throttling
valvebeinstalledinthedischargelineifthereisany
possibility of siphoning or back flow when the
pump is shut off.
Operational Checks
Check the pump for proper operation when first
started and periodically thereafter to identify minor
problems.
Check the pump for unusual noises or excessive
vibration while it is operating. If noise or vibration
is excessive, stop the pump and refer to the trou-
bleshooting chart for possible causes.
Check the pump strainer screen for clogging
caused by stones, sticks, or other debris. Clean
the strainer screenwhen required. In somecases,
stopping the pump momentarily may back flush
the strainer screen, purging most of the debris
from it. If this fails to clean the screen, remove the
pumpfromthesumpandremovethedebrismanu-
ally. See PUMP DISASSEMBLY in the Mainte-
nance And Repair manual.
Never introduce air or steam pressure
intothe pump casing toremove ablock-
age. This could result in personal injury
or damage to the equipment. If back-
flushing is absolutely necessary, limit
liquidpressureinputto50%ofthemaxi-
mum permissible operating pressure
showninthepumpperformancecurve
(refer to the accompanying Parts List
Manual).
Check the pump for overheating. Overheating can
occur if the pump is made to startand stop repeat-
edly without time to cool off between starts, the liq-
uid level is allowedto falltoo low tosufficientlycool
the motor, or if the circuit breaker or fuse fails to
provide adequate protection. Operating the pump
against a closed discharge valve for an extended
period will also cause the pump to overheat.
Check the oil level(s) as indicated in the following
LUBRICATION section.

OM--01690 SSERIESPUMP
PAGE C -- 4 OPERATION
LIQUID LEVEL
Overheating will occur if the liquid falls be-
lowthelevelrequiredtocoolthepumpmo-
tor.
The pump willoperatefullyor partiallysubmerged.
However, since the motor is cooled by the liquid
being pumped, overheating will occur if the liquid
is pumped below the required to cool the motor.
Auto-start models will shut down before the liquid
level falls too low.
COLD WEATHER PRESERVATION
Donotattempttothawthepumpbyus-
ingatorchorothersourceofflame.This
could damage gaskets, O-rings or heat
theoilinthesealhousingabovecritical
temperatures, causing the pump torup-
ture or explode.
The pump will not freeze as long as the casing is
submerged in liquid. If the casing is not sub-
merged,oriftheliquidbeginstofreeze,removethe
pumpfromthesumporwetwellanddryitthor-
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,thepumpmustbesubmergedforanextended
periodoftime.Checkthawingbystartingthepump
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.
LUBRICATION
Do not remove plates, covers, gauges,
pipe plugs or fittings from an over-
heatedpump. Vaporpressure within the
pump can cause parts being disen-
gaged to be ejected with great force. Al-
low the pump to completely cool before
servicing.
On a new pump, check the oillevel in the seal cav-
itybeforeinitialstartup. Drainandreplacetheoilaf-
ter the first 200 hours of operation. Following this,
checktheoillevelinthesealcavityafterthefirsttwo
weeks of operation, and every month thereafter.
Before installing or removing the lubrication plug,
always clean the area around the plug to prevent
contamination.
Draining Oil
Refer to Section E, Maintenance and Repair for
drain plug location.
It is not necessaryto drain theoil fromthe seal cav-
ity unless the pump casing will be separated from
the motor housing.
Laythe pumphorizontal ona flat work surfacewith
the seal cavity drain plug facing up. Remove the
drain plug slowly to release any pressure. Install a
shortpipenippleinthehole.Placeacleancontain-
er under 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 pump seal is
functioning properly. If the oil is milky or contains
a small amount of water, it must be changed.
If the oil contains a large amount of water, it must
be changed, and the seal must be checkedbefore
the pump is put back in operation (refer to Section
E, Maintenance and Repair).

SSERIESPUMP OM--01690
PAGE C -- 5
OPERATION
Adding Oil
Refer to Table B-2 in INSTALLATION for pump oil
capacities.
The grade of lubricant usedis criticalto theopera-
tion of this pump. Use SAE No. 10 non-detergent
oil.Oilmustbestoredinaclean,tightlyclosedcon-
tainer in a reasonably dry environment.
When lubricating the seal cavity, remove the lu-
bricationplugasindicatedin DrainingOil.Addthe
non-detergent oil through this plug hole. With the
pump positioned horizontally, sight down the plug
hole and check that the oil level is high enough to
cover the seal spring.
Install and tighten the lubrication plug.

OM--01690SSERIESPUMP
TROUBLESHOOTING PAGE D -- 1
TROUBLESHOOTING --- SECTION D
Review all SAFETY information in Section A.
The following precautions should be
taken before attempting to service the
pump; otherwise, injury or death could
result.
1. Familiarize yourself with this man-
ual.
2. Unplugthepowercablefromitsre-
ceptacle to ensure that the pump
will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates or
plugs.
5.Closethedischargevalve(if
used).
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.
NOTE
Many of the probable remedies listed below re-
quire use of electrical test instruments; for specific
procedures,see ELECTRICAL TESTINGfollowing
the chart.
Table 1. Trouble Shooting Chart
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS TO START,
OVERLOAD UNIT NOT
TRIPPED
(MANUAL MODE)
(AUTOMATIC MODE)
Power source incompatible with
pump motor.
Novoltage at line side of power cable
connection.
Open circuit in motor windings or
power cable.
Defective motor.
Liquid level device or control circuits
improperly connected to main con-
trol box.
Level sensing device(s) improperly
positioned.
Level sensing device(s) fouled with
mud or foreign material.
Float type sensing device(s) tangled
or obstructed.
Correct power source.
Check power source for blown fuse,
open breaker, broken lead, or loose
connection.
Check continuity.
Check for and replace defective unit.
Check wiring diagrams; correct or
tighten connections.
Position device(s) at proper level.
Clean sensing device(s).
Check installation for free movement
of float.

SSERIESPUMP OM--01690
TROUBLESHOOTINGPAGE D -- 2
Table 1. Trouble Shooting Chart (cont.)
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
(AUTOMATIC MODE)
(CONT’D.) Defective liquid level sensing de-
vice(s) or control panel. Repair or replace defective unit(s).
MOTOR RUNS, BUT
PUMP FAILS TO
DELIVER RATED
DISCHARGE
Discharge head too high.
Low or incorrect voltage.
Discharge throttling valve partially
closed; check valve installed im-
properly.
Dischargelinecloggedorre-
stricted; hose kinked.
Liquid being pumped too thick.
Strainer screen or impeller clogged.
Insufficient liquid in sump or tank.
Worn impeller vanes; excessive im-
peller clearance.
Reduce head.
Measure control box voltage, both
when pump is running and when
shut-off.
Open discharge valve fully; check
piping installation.
Check discharge lines; straighten
hose.
Dilute liquid if possible.
Clear clog(s). Stop pump; back flow
may flush away debris.
Stop pump until liquid level rises.
Check impeller and clearance. See
PUMP END REASSEMBLY.
PUMP RUNS WITH
EXCESSIVE NOISE OR
VIBRATION
Pumping entrained air.
Damagedorunbalancedimpeller.
Discharge piping not properly sup-
ported.
Impellerjammedorloose.
Motor shaft or bearings defective.
Pump cavitation.
Check liquid level in sump; check
position of pump and liquid level
sensing device(s).
Replace impeller.
Check piping installation.
Check impeller.
Disassemble pump and check mo-
tor and bearings.
Reduce discharge head, or restrict
flow on low head applications.
ELECTRICAL TESTING
If you suspect that pump malfunctions are caused
bydefectsinthemotor,powercableorcontrolbox,
performthefollowingcheckstohelpisolatethede-
fective part.
Obtain the services of a qualified elec-
trician to troubleshoot, test and/or ser-
vice the electrical components of this
pump.
Be certain to refer to the wiring diagram(s)
in the Installation Operations manual be-
fore reconnecting any electrical compo-
nents which have been disconnected.

OM--01690SSERIESPUMP
TROUBLESHOOTING PAGE D -- 3
Test Equipment
A volt/amp/ohmmeter and megohmeter of ade-
quaterangeandqualitywillberequiredtoconduct
thefollowingelectricaltests.Thesuggestedequip-
ment indicated below is commercially available, or
an equivalent substitute may be used.
Equipment Use
Ammeter To check AC Voltage
and current (amperage)
Ohmeter To measure resistance
(ohms) to ground
Motor And Motor Power Cable Continuity
To check continuity, zero-balance the ohmmeter
set at the RX1 scale, and test as follows:
a Disconnectthepowercableplugfromits re-
ceptacle.
b. Connect the test leads to the two power
cableleads(nottothe greengroundlead).If
there is a high resistance reading on the
ohmmeter, there isanopenorbrokencircuit
causedbya break inthe powercableormo-
tor windings, or by a bad connection be-
tween the motor and the power cable.
c. If an open or broken circuit is indicated,
check the power cablefor obvious damage,
and replace as necessary (see MAINTE-
NANCE AND REPAIR).Theentire motor
power cable must be replaced; splicing or
other means of repair are not recom-
mended.
d. Ifthepowercableappearsundamaged,see
Head and Power Cable Removal,sepa-
ratethepumpheadfromthemotorhousing,
and disconnect the power cable leads from
the auto control device leads. Separately
test each of the cable leads, (including the
green ground lead) for continuity. If any of
the power cable leads do not check out for
continuity, replace the entire power cable.
e. If no break is found in the power cable, con-
nect the test leads to the stator leads. If the
testreadingindicatesanopenorbrokencir-
cuit, there is an open circuit in the motor.
NOTE
Itisrecommendedthatapumpwithadefectivemo-
tor be returned to Gorman-Rupp, or to one of the
Gorman-Rupp authorized Submersible Repair
Centers.
f. Be certain to reconnect all leads as indi-
cated in theWiring Diagram, Figure D-1and
seal the connections with the male and fe-
male connector sleeves before reassem-
bling the pump head to the motor housing.
If insulation resistance is to be checked, donotas-
semblethepumpheadtothemotorhousingatthis
time.
Insulation Resistance
To check insulation, zero-balance the ohmmeter
set at the RX100K scale, and test as follows:
a. Disconnectthepowercableplugfromitsre-
ceptacle.
b. Connect one test lead to the power cable
plug grounding prong and touch the other
test lead to each of the two power prongs in
turn.
c. The reading obtained will indicate resis-
tancevaluesinboththepowercableandthe
motor windings. If the resistance reading is
infinity (1), the insulation is in good condi-
tion. If the reading is between infinity (1)
and 1 megohm, the insulation is acceptable
but should be rechecked periodically. If the
reading is less than 1 megohm, the insula-
tion should be checked more closely. A
reading of zero indicates that the power
cable or the motor is grounded.
d. To determine whether the power cable or
the motor is grounded, separate the pump
head from the motor housing (see Head
and power Cable Removal/Installation in
MAINTENANCEANDREPAIRsection)and
disconnect the power cable leads. Test the

SSERIESPUMP OM--01690
TROUBLESHOOTINGPAGE D -- 4
power cable leads and motor leads sepa-
rately.
e. Be certain to reconnect all leads as indi-
cated in theWiring Diagram, Figure D-1and
seal the connections with the male and fe-
male connector sleeves before reassem-
bling the pump head to the motor housing.
Capacitor
The start capacitor, located in the head of the
pump, is designed tosplit the electricalphase dur-
ing the initial power surge at motor startup.
Before disconnecting the capacitor leads,
dischargethecapacitor;useascrewdriver
with an insulated handle, and place the
blade across the two terminals of the ca-
pacitor to short the terminals.
Zero-balance the ohmmeter set to read RX100K,
and test the capacitor as follows:
a. See Figure E-1in Section E, and disconnect
the leads to the capacitor.
b. Place a test lead against each of thecapaci-
torterminalsforafewseconds.Iftheohm-
meterneedlemovestowardzero,thenslow-
ly drifts back to the left, the capacitor is
good.Iftheneedleremainsatinfinity(1)the
capacitor is open. if the needle remains at
zero,thecapacitorisshorted.Ineithercase,
the capacitor must be replaced.
c. Check for grounding by touching one test
leadtothecapacitorcaseandtheotherlead
to each of the capacitor terminals in turn.
The ohmmeter should read infinity (1); if it
does not, the capacitor is grounded and
must be replaced.
d. After the capacitor has been checked, re-
connected the capacitor leads.
Figure D-1. Wiring Diagram