GORMAN-RUPP PUMPS JDV4A60-E2.7 200/3 User manual

OM−03500−OM06
December 14, 2006
D
THE GORMAN-RUPP COMPANY MANSFIELD, OHIO
www.grpumps.com
GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.
Copyright by the Gorman-Rupp Company
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
WITH PARTS LIST
SUBMERSIBLE PUMPS
MODELS
JDV4A60−E2.7 200/3 JDV4A60−E2.7 230/3 JDV4A60−E2.7 460/3
JDV4B60−E2.7 200/3 JDV4B60−E2.7 230/3 JDV4B60−E2.7 460/3
JDV4C60−E2.7 200/3 JDV4C60−E2.7 230/3 JDV4C60−E2.7 460/3

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:

JDV4A−B−COM−03500
TOC PAGE−1
TABLE OF CONTENTS
INTRODUCTION PAGE I−1. . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY − SECTION A PAGE A−1. . . . . . . . . . . . . . . . . . . . .
INSTALLATION − SECTION B PAGE B−1. . . . . . . . . . . . . .
PREINSTALLATION INSPECTION PAGE B−1. . . . . . . . . . . . . . . . . . . .
LUBRICATION PAGE B−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Dimensions PAGE B−1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Motor Specifications PAGE B−3. . . . . . . . . . . . . . . . . . . . . . .
PUMP INSTALLATION PAGE B−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lifting PAGE B−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Positioning the Pump PAGE B−3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Piping PAGE B−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CONNECTIONS PAGE B−4. . . . . . . . . . . . . . . . . . . . . . .
Field Wiring Connections (Incoming Power) PAGE B−4. . . . . . . .
Voltage Limits PAGE B−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual Voltage PAGE B−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Cable Grounding Test PAGE B−4. . . . . . . . . . . . . . . . . . . . .
Conductor Identification PAGE B−5. . . . . . . . . . . . . . . . . . . . . . . . .
Control Box Connections PAGE B−5. . . . . . . . . . . . . . . . . . . . . . . .
Liquid Level Devices PAGE B−5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagram PAGE B−7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION − SECTION C PAGE C−1. . . . . . . . . . . . . . . .
PERFORMANCE CURVES PAGE C−1. . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTROL BOX AND OPTIONAL CONTROLS PAGE C−4. . . . . . . . . .
PUMP OPERATION PAGE C−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid Temperature and Overheating. PAGE C−4. . . . . . . . . . . . .
Impeller Rotation PAGE C−4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTING, STOPPING, AND OPERATIONAL CHECKS PAGE C−5.
Starting PAGE C−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stopping PAGE C−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational Checks PAGE C−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cold Weather Preservation PAGE C−5. . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING − SECTION D PAGE D−1. . . . . . . .
TROUBLESHOOTING CHART PAGE D−1. . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL TESTING PAGE D−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Equipment PAGE D−2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Imbalance PAGE D−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor and Power Cable Continuity PAGE D−3. . . . . . . . . . . . . . . .

OM−03500JDV4A−B−C
TOC
PAGE−2
Insulation Resistance PAGE D−3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE & REPAIR − SECTION E PAGE E−1. . . .
PARTS LISTS:
Pump Models PAGE E−3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor Assemblies PAGE E−5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PUMP AND MOTOR DISASSEMBLY AND REASSEMBLY PAGE E−6
PUMP END DISASSEMBLY PAGE E−6. . . . . . . . . . . . . . . . . . . . . . . . . .
Removing Pump From Stand PAGE E−6. . . . . . . . . . . . . . . . . . . . .
Removing Volute Casing PAGE E−6. . . . . . . . . . . . . . . . . . . . . . . . .
Removing Impeller PAGE E−6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing Seal Assembly PAGE E−7. . . . . . . . . . . . . . . . . . . . . . . .
MOTOR DISASSEMBLY PAGE E−7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing Motor Cover PAGE E−7. . . . . . . . . . . . . . . . . . . . . . . . .
Removing Rotor and Shaft Assembly PAGE E−8. . . . . . . . . . . . . .
Removing Bearings PAGE E−8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION AND CLEANING PAGE E−8. . . . . . . . . . . . . . . . . . . . . . .
Bearings PAGE E−8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other Reusable Parts (Except Seal Assembly) PAGE E−8. . . . . .
Cleaning Seal Assembly PAGE E−9. . . . . . . . . . . . . . . . . . . . . . . . .
PUMP AND MOTOR REASSEMBLY PAGE E−9. . . . . . . . . . . . . . . . . . .
MOTOR REASSEMBLY PAGE E−9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Bearings PAGE E−9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Shaft and Rotor Assembly PAGE E−10. . . . . . . . . . . . . . .
Installing Motor Cover PAGE E−10. . . . . . . . . . . . . . . . . . . . . . . . . .
PUMP END REASSEMBLY PAGE E−11. . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Seal Assembly PAGE E−11. . . . . . . . . . . . . . . . . . . . . . . . .
Seal Testing PAGE E−13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Impeller PAGE E−13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Volute Casing PAGE E−14. . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Pump on Stand PAGE E−14. . . . . . . . . . . . . . . . . . . . . . . .
LUBRICATION PAGE E−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Draining Oil PAGE E−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condition Of Oil PAGE E−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Oil PAGE E−14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OM−03500JDV SERIES
PAGE I − 1
INTRODUCTION
INTRODUCTION
Thank You for purchasing a Gorman-Rupp pump.
Read this manual carefully to learn how to safely
install and operate your pump. Failure to do so
could result in personal injury or damage to the
pump. This Installation, Operation, and Mainte-
nance Manual is designed to help you achieve the
best performance and longest life from your Gor-
man-Rupp J Series submersible pump.
These J Series pumps are driven by a waterproof
submersible electric motor. The motor is shipped
from the factory wired only for the voltage shown
on the nameplate. On dual voltage models, con-
tact the factory before attempting to change to
the alternative voltage.
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 also provide for proper operation of the motor
protection devices such as the integral moisture
and thermal switches. Control boxes and other
control devices other than those integral to the
pump motor are not covered in this manual. Refer
to other literature accompanying the pump.
Pump construction is cast iron, with stainless steel
shaft and hardware. These pumps have a 4−inch
discharge, and will handle solids up to 3 inches (80
mm) in diameter.
If there are any questions regarding the pump or
motor which are not covered in this manual or in
other literature accompanying this unit, please
contact your Gorman-Rupp distributor or the Gor-
man-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
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.

JDV SERIES OM−03500
PAGE A − 1
SAFETY
SAFETY − SECTION A
This information is specific to the Gorman-Rupp J
Series Submersible pumps listed on the cover and
in MAINTENANCE AND REPAIR − SECTION E.
They apply throughout this manual to the in-
structions contained in the pages which follow.
In addition to this manual, see the separate litera-
ture covering the control box and other control ac-
cessories which will be used with this pump. This
literature contains essential information on install-
ing and operating the pump, and on making elec-
trical connections.
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.
This pump is designed to handle raw
sewage and industrial wastes at tem-
peratures of 104F (40C); do not apply
at higher temperatures. Do not attempt
to pump volatile, flammable, or corro-
sive liquids which may damage the
pump or endanger personnel as a result
of pump failure.
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.
230/460 volt models are dual-voltage;
however, they are wired at the factory
only for the voltage shown on the name-
plate. Do not attempt to change the volt-
age in the field. If desired to have the
voltage changed, return the pump to the
factory or to an authorized Gorman-
Rupp repair facility only. Otherwise,
damage to the pump and injury or death
to personnel can result.
Do not connect the pump motor directly
to the incoming power lines. The pump
motor is designed to operate through a
Gorman-Rupp approved control box
which provides overload protection and
power control; otherwise, the pump
warranty will be voided. Make certain
that the pump and control box are prop-
erly grounded and that the incoming
power matches the requirements of the
pump and controls. Install and operate
the control box in accordance with the
National Electric Code and all local
codes. Failure to follow the instructions
in this warning could result in injury or
death to personnel.
Do not attempt to lift this pump by the
motor power cable or the piping. Attach
proper lifting equipment to the lifting
handle, and make certain that the hook
of the lifting device is securely posi-
tioned in the apex of the handle. If
chains or cables are wrapped around

OM−03500 JDV SERIES
PAGE A − 2 SAFETY
the pump to lift it, make certain that they
are positioned so as not to damage the
pump, and so that the load will be bal-
anced.
After the pump has been installed, make
certain that the pump and all piping or
hose connections are secure before op-
eration. Loose connections can result in
damage to equipment and serious inju-
ry to personnel.
If this pump is used to handle sewage,
take necessary precautions during
maintenance and repair to prevent per-
sonal contamination which could result
in illness.
The following precautions should be
taken before attempting to open or ser-
vice the pump; otherwise, injury or
death could result.
1. Lock out the power to the control pan-
el to ensure that the pump will remain
inoperative.
2. Allow the pump to cool if over heated.
3. Close the discharge valve (if used).

JDV SERIES OM−03500
PAGE B − 1
INSTALLATION
INSTALLATION − SECTION B
Review all SAFETY information in Section A.
This section is intended only to summarize recom-
mended installation practices for this pump. If
there are any questions concerning your specific
installation, contact your Gorman-Rupp distributor
of the Gorman-Rupp Company.
Automatic liquid level controls are available from
Gorman-Rupp as options. For information on in-
stalling and operating these controls, see the tech-
nical data accompanying them.
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 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 provided with 26 ft. (8
m.) of power cable. Inspect the cable for cuts
or damage.
d. Check that amperes, phase, voltage, and
Hertz indicated on the motor name plate
match the ratings on the control box.
e. Carefully read all tags, decals, and markings
on the pump assembly, and perform all duties
indicated.
f. Check for any oil leaks. If there is any indica-
tion of an oil leak, see LUBRICATION in
MAINTENANCE AND REPAIR − SECTION
E.
LUBRICATION
These pumps are equipped with a mechanical
double seal. The lower seal prevents the liquid be-
ing pumped from entering the seal housing cavity
from the pump end. The upper seal prevents oil
from escaping from the seal housing into the motor
housing, and acts as backup protection in the
event of lower seal failure.
Both ends of the shaft seal are lubricated by oil in
the seal housing (see LUBRICATION in MAINTE-
NANCE AND REPAIR − SECTION E).
The shaft bearings are permanently lubricated.
There is no other lubrication in the pump.
Pump Dimensions
See Figure B-1 for the approximate physical di-
mensions of this pump.

OM−03500 JDV SERIES
PAGE B − 2 INSTALLATION
FIGURE B−1. PUMP DIMENSIONS

JDV SERIES OM−03500
PAGE B − 3
INSTALLATION
Pump Motor Specifications
The motor furnished with this pump is a 60 Hz.,
Squirrel Cage, Induction Start, G-R Frame Size No.
1; Class F Insulation Rated 155C (311F), 40C
(104F) ambient, plus 115C (239F) temperature
rise.
See Table B−1 for motor specifications.
TABLE B-1. PUMP MOTOR SPECIFICATIONS
MODEL VOLTAGE SIZE
RPM
MOTOR MAX NO LOCKEDH.P.
NUMBER LOAD LOAD ROTOR
JDV4A60−E2.7
JDV4A60−E2.7
230/3
460/3
4"
4"
2.7
2.7
1750
1750
9.0A 4.8A 55.8A
/PHASE
4.5A 2.4A 27.9A
JDV4B60−E2.7
JDV4B60−E2.7
230/3
460/3
4"
4"
2.7
2.7
1750
1750
JDV4C60−E2.7
JDV4C60−E2.7
230/3
460/3
4"
4"
2.7
2.7
1750
1750
9.0A 4.8A 55.8A
4.5A 2.4A 27.9A
9.0A 4.8A 55.8A
4.5A 2.4A 27.9A
JDV4C60−E2.7 200/3 4" 2.7 1750
JDV4B60−E2.7 200/3 4" 2.7 1750
JDV4A60−E2.7 200/3 4" 2.7 1750 10.3A 5.5A 64.2A
10.3A 5.5A 64.2A
10.3A 5.5A 64.2A
PUMP INSTALLATION
Lifting
Pump unit weights will vary depending on the
mounting and drive provided. Check the shipping
tag on the unit packaging for the actual weight, and
use lifting equipment with appropriate capacity.
Drain the pump and remove all customer-installed
equipment such as suction and discharge hoses
or piping before attempting to lift existing, installed
units.
Positioning the Pump
NOTE
Before installing and operating the pump, check
the direction of impeller rotation to ensure that the
pump is properly wired at the control box. See IM-
PELLER ROTATION, SECTION C.
This pump is designed to be mounted on a stand in
a dry pit with an optional 4 x 6 inch suction elbow.
See Figure B−1 for a typical stand/elbow installa-
tion.
Refer to Section E, Figure E−1. Install and secure
the stand in the floor of the dry pit. Install the upper
seal (79) on the stand, and position the pump on
the stand. Install the lower seal on the suction el-
bow, and secure the elbow to the stand and pump
with the screws (21).
Align the elbow with the system suction piping, and
secure. Align the volute casing flange with the sys-
tem discharge piping, and secure.
Reel in any slack control cable, and wire the motor
as indicated in the wiring diagrams in this section.

OM−03500 JDV SERIES
PAGE B − 4 INSTALLATION
Piping
NOTE
Refer to PERFORMANCE CURVES in OPERA-
TION − SECTION C when determining the most ef-
ficient piping installation. The maximum recom-
mended submergence depth is 65 feet.
This pump is designed for operation with an op-
tional 4−inch discharge elbow. Use rigid pipe to
make discharge connections to the elbow.
The discharge line must be independently sup-
ported to avoid vibration and strain on the pump.
For maximum pumping capacity, keep the line as
short and straight as possible. Elbows and fittings
used in a discharge line increase friction losses;
minimize their use.
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)
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. MOTOR VOLTAGE LIMITS
NOMINAL
VOLTAGE
3200 180 220
PHASE MINIMUM
VOLTAGE
MAXIMUM
VOLTAGE
3460 420 500
3230 210 250
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.
Dual Voltage
230/460 volt pumps are dual-voltage;
however, they are wired at the factory
only for the voltage shown on the name-
plate. Do not attempt to change the volt-
age in the field. If desired to have the
voltage changed, return the pump to the
factory or to an authorized Gorman-
Rupp repair facility only. Otherwise,
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 lamp, bell or similar testing de-
vice to motor cable green/yellow ground lead.

JDV SERIES OM−03500
PAGE B − 5
INSTALLATION
Connect second test lead to an uninsulated point
on the pump 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.
Conductor Identification
The conductors in the pump cable are labeled
when shipped from the factory. If the conductors
are shortened in the field, resulting in loss of identi-
fication markers, they can still be identified by their
location relative to the ground wire.
Refer to FIGURE B−4; as seen from the free end of
the cable, the conductor immediately adjacent to
and clockwise from ground (green/yellow) is heat-
shrink wrapped with the fourth conductor, and as-
signed number T1. The second clockwise conduc-
tor is heat-shrink wrapped with the fifth conductor,
and assigned numberT2. The third clockwise con-
ductor is heat-shrink wrapped with the sixth con-
ductor, and assigned numberT3.
The conductors labeled P1 and P2 are for thermal
and moisture sensor connections, respectively.
If the conductors are relabled, they should be iden-
tified with wire markers from the factory.
Control Box Connections
The pump warranty is void if the motor is
not operated through a control box ap-
proved by Gorman-Rupp.
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−2, and connect the pump mo-
tor cable to the control box.
FIGURE B−2. FIELD CONNECTIONS
Control leads P1 and P2 provide the motor with
moisture and thermal protection. Note that thermal
protection is supplementary only; separate Class
10 overload relays are required for motor running
protection.
The thermal protection contacts will auto-
matically reclose 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.
Wiring Diagram
The motor connection diagram is shown in FIG-
URE B−3.

OM−03500 JDV SERIES
PAGE B − 6 INSTALLATION
FIGURE B−3. MOTOR CONNECTIONS
The complete schematic wiring diagram for the
motor is shown In FIGURE B−5.
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 FIG-
URE B−4).
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.
Diaphragm 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.
Bulb (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.

JDV SERIES OM−03500
PAGE B − 7
INSTALLATION
PUMP
CONTROL BOX
LIQUID LEVEL
RANGE
ON (FILLING)
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL BOX
OFF
DEWATERING
PUMP
CONTROL BOX
TO LEVEL CONTROL CIRCUIT
IN MAIN CONTROL BOX
LIQUID LEVEL
RANGE
OFF
DEWATERING
ON (FILLING)
FIGURE B−4. LIQUID LEVEL DEVICES
FIGURE B−5. INTERNAL MOTOR WIRING

OM−03500 JDV SERIES
PAGE B − 8 INSTALLATION
FIGURE B−6. INTERNAL MOTOR WIRING

JDV SERIES OM−03500
PAGE C − 1
OPERATION
OPERATION − SECTION C
PERFORMANCE CURVES
In the performance curves which follow, perform-
ance is based on 70F (21C) clear water at sea
level. The performance of your pump may be differ-
ent due to such factors as viscosity, specific grav-
ity, elevation, temperature, and impeller trim.
NOTE
The curves apply to standard production models. 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 per-
formance.
PERFORMANCE CURVE − JDV4A60−E2.7 200/230/460/3

OM−03500 JDV SERIES
PAGE C − 2 OPERATION
PERFORMANCE CURVE − JDV4B60−E2.7 200/230/460/3

JDV SERIES OM−03500
PAGE C − 3
OPERATION
PERFORMANCE CURVE − JDV4C60−E2.7 200/230/460/3

OM−03500 JDV SERIES
PAGE C − 4 OPERATION
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
CONTROL BOX AND OPTIONAL CONTROLS
The pump warranty is void if the motor is
not operated through a control box ap-
proved by Gorman-Rupp.
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.
Standard versions of this pump will handle
liquids with temperatures up to 104F
(40C) maximum. Do not install in service
with higher liquid temperatures; otherwise,
pump components and operation may be
affected.
Overheated pumps can cause severe
burns and injury. If the pump becomes
overheated:
1. Stop the pump immediately.
2. Allow the pump to cool.
3. Refer to instructions in this manual
before restarting the pump.
Overheating can occur if the pump is misapplied, if
it is started more than 25 times within one hour, if
the control box fails to provide overload or thermal
protection, or if the pump is operated against a
closed discharge valve for an extended period of
time.
Impeller Rotation
Refer to Figure C−1, and check impeller rotation
as follows before installing the pump on rails or in a
wet well.
FIGURE C−1. PUMP ROTATION
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 twist.
As viewed from the top, the pump should twist in a
counterclockwise direction; this will indicate that
impeller rotation is correct.
If the pump twists in a clockwise direction, impeller
rotation is incorrect. Have qualified personnel inter-
change the control box connections of any two
pump motor power leads. Recheck pump twist; it
should now be in a counterclockwise direction.

JDV SERIES OM−03500
PAGE C − 5
OPERATION
STARTING, STOPPING, AND OPERATIONAL
CHECKS
Starting
Do not attempt to operate the pump until
impeller rotation has been checked; other-
wise, the pump will be damaged.
Never start the pump more than 25 times
within one hour. The motor must cool be-
tween starts; otherwise, it will overheat and
damage the motor windings and/or control
box components.
Follow the control box manufacturer’s instructions,
start the pump, and run any recommended
checks.
Stopping
Follow the control box manufacturer’s instructions
for stopping the pump.
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-
tempt to handle or service the pump un-
less all power to the motor has been
shut off at the control 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 in com-
ing power has been shut off.
After stopping the pump, be sure to perform all re-
quired maintenance and preservation procedures.
Operational Checks
To detect minor problems, check the pump for
proper operation when it is first started and at peri-
odic intervals.
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 wet well, disconnect power, and
clear manually.
Never introduce air or steam pressure
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 on the Pump Performance
Curves.
Check the pump for overheating. Overheating can
occur if the pump is misapplied, required to start
more than 25 times within one hour, if the control
box fails to provide overload or thermal protection,
or if the pump is operated against a closed dis-
charge valve for an extended period of time.
Cold Weather Preservation
The pump will not freeze as long as the casing is
submerged in liquid. If the casing is not sub-