Gorman-Rupp Pumps SE1-1-2A3A User Manual

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Page 1

OM−06489−01

August 15, 2011

INSTALLATION, OPERATION,

AND MAINTENANCE MANUAL

WITH PARTS LIST

SE SERIES PUMP

MODEL

SE1 1/2A3A 115V 1P

THE GORMAN-RUPP COMPANY  MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED  ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

www.grpumps.com

2011 The Gorman-Rupp Company

Page 2

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

INTRODUCTION PAGE I − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY - SECTION A PAGE A − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION − SECTION 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Power Cable Connections PAGE B − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Motor Cable Grounding Test PAGE B − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Liquid Level Devices PAGE B − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATION − 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring Diagram PAGE D − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP MAINTENANCE AND REPAIR - SECTION E PAGE E − 1. . . . . . . . . . . . . . . . .

STANDARD PERFORMANCE CURVE PAGE E − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP MODEL S1 1/2A3 115V 1P PARTS LIST PAGE E − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E − 4. . . . . . . . . . . . . . . . . . . . . . . . .

Page 4

TABLE OF CONTENTS

(continued)

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 − 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Head And Power Cable Removal PAGE E − 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rotor And Shaft Removal PAGE E − 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bearing Removal PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Centrifugal Switch Actuator Removal PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stator Removal PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MOTOR REASSEMBLY PAGE E − 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stator Installation PAGE E − 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Centrifugal Switch Actuator Installation PAGE E − 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bearing Installation PAGE E − 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rotor And Shaft Installation PAGE E − 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Head And Power Cable Installation PAGE E − 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VACUUM/PRESSURE TESTING PAGE E − 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LUBRICATION PAGE E − 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seal Cavity PAGE E − 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Motor Cavity PAGE E − 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page 5

SE SERIES OM−06489

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 is an SE 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, thermallyprotected electric motor which is not explosionproof. The pump may be operated fully or partially submerged. Do not operate the pump in a hazardous atmosphere.

All repairs to the pump motor must be performed by a Gorman-Rupp authorized submersible repair facility or the factory. Any repairs to the motor assembly performed by the customer or an unauthorized repair facility negates the warranty.

Gorman-Rupp of Canada Limited

70 Burwell Road

St. Thomas, Ontario N5P 3R7

Phone: (519) 631−2870

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 which WILL result in severe personal injury or death. These instructions describe the procedure required and the injury which will result from failure to follow the procedure.

Because pump installations are seldom identical, this manual cannot possibly provide detailed instructions and precautions for every aspect of each specific application. Therefore, it is the responsibility of the owner/installer of the pump to ensure that applications not addressed in this manual are performed only after establishing that neither operator safety nor pump integrity are compromised by the installation. Pumps and related equipment must be installed and operated according to all national, local and industry standards.

If there are any questions regarding the pump or its application which are not covered in this manual 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: (419) 755−1011

or:

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 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 − 1INTRODUCTION

Page 6

SE SERIES OM−06489

SAFETY − SECTION A

This information applies to SE Series submersible motor driven pumps.

Because pump installations are seldom identical, this manual cannot possibly provide detailed instructions and precautions for each specific application. Therefore, it is the owner/installer’s responsibility to ensure that applications not addressed in this manual are performed only after establishing that neither operator safety nor pump integrity are compromised by the installation.

Before attempting to open or service the pump:

1. Familiarize yourself with this manual.

2. Unplug the power cable from its receptacle 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 volatile, explosive, or flammable materials. Do not attempt to pump any liquids for which you pump is not approved, or which may damage the pump or endanger personnel as a result of pump failure. Consult the factory for specific application data.

The electrical power used to operate

this pump is high enough to cause injury 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 injury or death. Make certain that the plug on the pump power cable is disconnected from its receptacle before servicing.

The electrical power used to operate this pump is high enough to cause injury or death. Obtain the services of a qualified electrician to make all electrical connections.

Never attempt to alter the length or repair any power cable with a splice. The pump motor and cable must be completely waterproof. Injury or death may result from alterations.

All electrical connections must be in accordance with The National Electric Code and all local codes. If there is a conflict between the instructions provided 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

SAFETY

PAGE A − 1

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OM−06489 SE SERIES

date of manufacture. Failure to follow applicable specifications, or substitution of electrical parts not supplied or approved by the manufacturer, can result in severe injury or death and void warranty.

After the pump has been installed, make certain that the pump and all piping or hose connections are secure before operation.

Obtain the services of a qualified elec-

trician to troubleshoot, test and/or service the electrical components of this pump.

Do not attempt to lift the pump by the 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 national, local and industry standards.

PAGE A − 2 SAFETY

Page 8

OM−06489 SE SERIES

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 recommendations and practices required to inspect, position, and arrange the pump and piping. If there are any questions concerning your specific installation, contact your Gorman-Rupp distributor or the Gorman-Rupp Company.

Nuts, bolts and screws used on this pump are metric and do not match standard SAE 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 assembly was inspected and tested before shipment from the factory. Before installation, check for damage which may have occurred during shipment. Check as follows:

a. Inspect the pump assembly for cracks, dents,

damaged threads, and other obvious damage.

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.

g. If the pump has been stored for more than 12

months, some of the components or lubricants may have exceeded their maximum shelf life. These must be inspected or re- placed to ensure maximum pump service.

If the maximum shelf life has been exceed, or if 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 appropriate action has been taken.

PUMP SEAL

The pump is equipped with a single faced seal assembly. 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.

The seal is lubricated by premium quality submersible pump oil.

LUBRICATION

The pump is equipped with one double-faced seal assembly. It is designed to prevent the liquid being pumped from entering the lubrication cavity at the impeller end, and to prevent moisture or lubrication oil from entering the motor housing cavity at the motor end.

b. Check for and tighten loose attaching hard-

ware. Since gaskets tend to shrink after drying, 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 power.

This pump was fully lubricated when shipped from the factory. However, lubrication levels must be

checked before installing the pump (see LUBRICATION in the MAINTENANCE AND REPAIR MANUAL). If the oil level is abnormally low, deter-

mine the cause before putting the pump into service.

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 specifications and intervals.

PAGE B − 1INSTALLATION

Page 9

SE SERIES

PUMP INSTALLATION

Pump Motor Specifications

See Tables B-1 and B-2 for pump specifications.

Table B-1. Pump Specifications

OM−06489

Model Voltage/

Phase

SE1 1/2A3A 115/1 YES 5.4 4.0 29.51/3 HP 3420

Pump Model

Voltage/

Phase

115/1SE1 1/2A3A

Liquid

Level

Control

50 (23) 6 (3) 7 (0,2) HORIZONTAL

Pump

HP/ KW

Table B-2. Additional Specifications

Approximate

Weight − Lbs. (kg)

Pump

Motor Speed (RPM)

50 Ft. Cable

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 requirements. Failure to observe these requirements could result in injury or death to personnel.

Full

Load

Amperes

Seal

Cavity

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.

Load

Amperes

Oil Capacity

Ounces (Liters)

Locked

Rotor

Amperes

Motor

Cavity

−−−

Discharge

Size

(NPT)

1 1/2 INCH w/BARBED

ADAPTOR

Seal Cavity

Filling

Position

(H)orizontal

NOTE

Refer to the performance curve in Section E, Maintenance and Repair when determining the most efficient piping installation. The recommended maximum submergence depth is 23 feet. Greater 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.

PAGE B − 2 INSTALLATION

Do not attempt to lift the pump by the 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 by a constant flow 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

Page 10

OM−06489 SE SERIES

torque could cause the pump to roll during operation.

The pump should be independently secured and supported by the lifting device fitted on the pump. If the application involves a lot of debris, protect the pump from excessive wear and clogging by suspending 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

No suction piping is required in a standard installation. 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 recommended that the discharge line be fitted with a quick disconnect fitting near the pump. The discharge line must be independently supported to avoid strain and vibration on the pump.

Either hose or rigid pipe may be used to make discharge connections. For maximum pumping capacity, keep the line as short and straight as possible. 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 to control siphoning or back flow when the pump is shut off.

ELECTRICAL CONNECTIONS

Install and operate this pump in accordance with the National Electrical Code and all local codes. Have a qualified electrician perform all checks and connections 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 motor must be kept completely waterproof.

PAGE B − 3INSTALLATION

Page 11

SE SERIES

OM−06489

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 available at the motor must be within the range indicated in Table B-3.

To calculate the voltage available at the motor, proceed as follows:

a. Measure the voltage while the pump is oper-

ating at full 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 recommended limits. Obtain the services of a qualified electrician to determine the correct field wiring size and other details to ensure an adequate voltage supply to the pump.

Pump Power Cable Connections

The electrical power used to operate this pump is high enough to cause injury or death. Obtain the services of a qualified electrician to make all electrical 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 directed 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 threewire single phase construction and have adequate carrying capacity for their length.

Table B-3. Pump Voltage Requirements

NOMINAL

VOLTAGE

Pump

Model

When necessary to service the pump, make certain the power cable is unplugged from the receptacle.

PHASE

1115 110 120

Voltage/

Phase

115/1

MINIMUM

VOLTAGE

Table B-4. Pump Power Cable Specifications

A.W.G

Cable

Size

16 13* SO 5.12SE1 1/2A3A 0.43 (11) 0.06 (1,5) 4.49

MAXIMUM

VOLTAGE

Cable

O.D.

Inches

(mm)

Conductor

Never attempt to alter the length or repair any power cable with a splice. The pump motor and cable must be completely waterproof. Injury or death may result from alternations.

Dia.

Inches

(mm)

Amp

Rating

(See Note

Below)

Cable

Type

Resistance

(ohms) at

225_C (77_F)

per 1000 ft.

(305 m)

Voltage

Drop

per 100 ft. (30,5m) at Max. Load

PAGE B − 4 INSTALLATION

Page 12

OM−06489 SE SERIES

Motor Cable Grounding Test

The electrical power used to operate this pump is high enough to cause injury 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 the other 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.

Liquid Level Devices

The pump is furnished with built-in devices to automatically regulate liquid level by filling and dewa-

tering. When liquid level reaches the on-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 provide conductivity necessary to trigger the automatic liquid level sensing devices built into the pump. If this occurs, ground the on-point assembly to convert the pump to manual operation, and install a float level control system.

Overheating will occur if the liquid level falls below the level required to cool the pump motor (see LIQUID LEVEL in Operation, Section C).

PAGE B − 5INSTALLATION

Page 13

SE SERIES OM−06489

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 endanger personnel as a result of pump failure. Consult the factory for specific application data.

The pump motor and optional accessories are not designed to be explosionproof. Do not operate in an explosive atmosphere.

Follow the instructions on all tags, labels and decals 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.

operational problems exists. See TROUBLE-

SHOOTING, Section D.

The pump motor is not designed to be explosion-proof. Do not operate in an explosive atmosphere. Improper operation could result in destruction of equipment, 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. Unplug the power cable from its receptacle to ensure that the pump will remain inoperative.

3. Allow the pump to completely cool if overheated.

4. Close the discharge valve (if used).

5. Refer to instructions in this manual before restarting the pump.

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 electrical receptacle is provided by a customer-furnished fuse or breaker within the circuit. If the breaker trips repeatedly,

Do not start the pump more than 6 times per hour. If the motor does not cool between starts it will overheat, resulting in damage to the motor windings.

PAGE C − 1OPERATION

Page 14

OM−06489 SE SERIES

The maximum liquid temperature for this pump is 120F (490C). Do not apply it at a higher operating temperature.

Overheating can occur if the pump is made to start and stop repeatedly without time to cool off between 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 protection. Operating the pump against a closed discharge valve for an extended period will also cause the pump to overheat.

Approach the pump cautiously after it has been running. Although the motor is cooled by the liquid being pumped, normal operating temperatures can be high enough to cause burns. The temperature will be especially high if operated against a closed discharge valve. Never operate against a closed discharge valve for long periods of time.

If overheating does occur, stop the pump immediately and allow it to cool before servicing it. Ap-

proach any overheated pump cautiously.

4. Check the temperature before servicing.

5. Vent the pump slowly and cautiously

6. Refer to instructions in this manual before restarting the pump.

Impeller Rotation

Check impeller rotation as follows before operation to ensure that the impeller is rotating in the correct direction.

While checking impeller rotation, secure the pump to prevent the power cable from 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.

Overheated pumps can cause severe burns and injuries. If overheating of the pump occurs:

1. Stop the pump immediately.

2. Ventilate the area.

3. Allow the pump to completely cool.

PAGE C − 2 OPERATION

If the pump kicks in a clockwise direction, impeller rotation is incorrect and the pump must be returned to the factory or a Gorman-Rupp authorized Submersible Repair Center. Remove the jumper wire. Since the pump is powered by a single-phase motor, the direction of rotation can not be altered by interchanging motor leads at the control box.

Page 15

SE SERIES OM−06489

Operational Checks

Check the pump for proper operation when first started and periodically thereafter to identify minor

DIRECTION OF

KICKBACK

AT STARTUP

Figure C-1. Checking Pump Rotation

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 troubleshooting chart for possible causes.

Check the pump strainer screen for clogging caused by stones, sticks, or other debris. Clean the strainer screen when required. In some cases, 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 pump from the sump and remove the debris manually. See PUMP DISASSEMBLY in the Mainte- nance And Repair manual.

STARTING, STOPPING, AND OPERATIONAL CHECKS

Starting And Stopping

Pump operation is controlled by the built-in liquid sensing devices. When liquid level reaches the onpoint (upper) device, the pump will switch on and continue to run until liquid level falls below the offpoint (lower) device.

NOTE

It is recommended that a check valve or throttling valve be installed in the discharge line if there is any possibility of siphoning or back flow when the pump is shut off.

Never introduce air or steam pressure into the pump casing to remove a blockage. This could result in personal injury or damage to the equipment. If backflushing is absolutely necessary, limit liquid pressure input to 50% of the maximum permissible operating pressure shown in the pump performance curve (refer to the accompanying Parts List Manual).

Check the pump for overheating. Overheating can occur if the pump is made to start and stop repeatedly without time to cool off between 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 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.

PAGE C − 3OPERATION

Page 16

OM−06489 SE SERIES

LIQUID LEVEL

Overheating will occur if the liquid falls below the level required to cool the pump motor.

The pump will operate fully or partially submerged. 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

LUBRICATION

Do not remove plates, covers, gauges, pipe plugs or fittings from an overheated pump. Vapor pressure within the pump can cause parts being disengaged to be ejected with great force. Allow the pump to completely cool before servicing.

On a new pump, check the oil level in the seal cavity before initial startup. Drain and replace the oil after the first 200 hours of operation. Following this, check the oil level in the seal cavity after the first two weeks of operation, and every month thereafter.

Before installing or removing the lubrication plug, always clean the area around the plug to prevent contamination.

Do not attempt to thaw the pump by using a torch or other source of flame. This could damage gaskets, O-rings or heat the oil in the seal housing above critical temperatures, causing the pump to rupture or explode.

The pump will not freeze as long as the casing is submerged in liquid. If the casing is not submerged, or if the liquid begins to freeze, remove the pump from the sump or wet well and dry it thoroughly. 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 freezing, 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.

Draining Oil

Refer to Section E, Maintenance and Repair for drain plug location.

It is not necessary to drain the oil from the seal cavity unless the pump casing will be separated from the motor housing.

Lay the pump horizontal on a flat work surface with the seal cavity drain plug facing up. Remove the drain plug slowly to release any pressure. Install a short pipe nipple in the hole. Place a clean container 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 checked before the pump is put back in operation (refer to Section E, Maintenance and Repair).

PAGE C − 4 OPERATION

Page 17

SE SERIES OM−06489

Adding Oil

Refer to Table B-2 in INSTALLATION for pump oil capacities.

The grade of lubricant used is critical to the operation of this pump. Use SAE No. 10 non-detergent oil. Oil must be stored in a clean, tightly closed container in a reasonably dry environment.

When lubricating the seal cavity, remove the lubrication plug as indicated in Draining Oil. Add the 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.

PAGE C − 5OPERATION

Page 18

TROUBLESHOOTING − SECTION D

OM−06489SE SERIES

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 manual.

2. Unplug the power cable from its receptacle 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.

Table 1. Trouble Shooting Chart

5. Close the discharge valve (if used).

The electrical power used to operate this pump is high enough to cause injury or death. Obtain the services of a qualified electrician to troubleshoot, test and/or service the electrical components of this pump.

NOTE

Many of the probable remedies listed below require use of electrical test instruments; for specific procedures, see ELECTRICAL TESTING following the chart.

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP FAILS TO START, OVERLOAD UNIT NOT TRIPPED (MANUAL MODE)

(AUTOMATIC MODE)

Power source incompatible with pump motor.

No voltage 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 control 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.

TROUBLESHOOTING PAGE D − 1

Page 19

SE SERIES OM−06489

Table 1. Trouble Shooting Chart (cont.)

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

(AUTOMATIC MODE) (CONT’D.)

MOTOR RUNS, BUT PUMP FAILS TO DELIVER RATED DISCHARGE

Defective liquid level sensing device(s) or control panel.

Discharge head too high.

Low or incorrect voltage.

Repair or replace defective unit(s).

Reduce head.

Measure control box voltage, both when pump is running and when shut-off.

PUMP RUNS WITH EXCESSIVE NOISE OR VIBRATION

Discharge throttling valve partially closed; check valve installed improperly.

Discharge line clogged or restricted; hose kinked.

Liquid being pumped too thick.

Strainer screen or impeller clogged.

Insufficient liquid in sump or tank.

Worn impeller vanes; excessive impeller clearance.

Pumping entrained air.

Damaged or unbalanced impeller.

Discharge piping not properly supported.

Impeller jammed or loose.

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.

Check liquid level in sump; check position of pump and liquid level sensing device(s).

Replace impeller.

Check piping installation.

Check impeller.

Motor shaft or bearings defective.

Pump cavitation.

ELECTRICAL TESTING

If you suspect that pump malfunctions are caused by defects in the motor, power cable or control box, perform the following checks to help isolate the defective part.

Obtain the services of a qualified elec-

Disassemble pump and check motor and bearings.

Reduce discharge head, or restrict flow on low head applications.

trician to troubleshoot, test and/or service the electrical components of this pump.

Be certain to refer to the wiring diagram(s) in the Installation Operations manual before reconnecting any electrical components which have been disconnected.

TROUBLESHOOTINGPAGE D − 2

Page 20

OM−06489SE SERIES

Test Equipment

A volt/amp/ohmmeter and megohmeter of adequate range and quality will be required to conduct the following electrical tests. The suggested equipment 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:

e. If no break is found in the power cable, con-

nect the test leads to the stator leads. If the test reading indicates an open or broken circuit, there is an open circuit in the motor.

NOTE

It is recommended that a pump with a defective motor 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 the Wiring Diagram, Figure D-1 and seal the connections with the male and female connector sleeves before reassembling the pump head to the motor housing.

If insulation resistance is to be checked, do not assemble the pump head to the motor housing at this time.

Insulation Resistance

a Disconnect the power cable plug from its re-

ceptacle.

b. Connect the test leads to the two power

cable leads (not to the green ground lead). If there is a high resistance reading on the ohmmeter, there is an open or broken circuit caused by a break in the power cable or motor windings, or by a bad connection between the motor and the power cable.

c. If an open or broken circuit is indicated,

check the power cable for obvious damage, and replace as necessary (see MAINTE- NANCE AND REPAIR). The entire motor power cable must be replaced; splicing or other means of repair are not recommended.

d. If the power cable appears undamaged, see

Head and Power Cable Removal, separate the pump head from the motor housing, 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.

To check insulation, zero-balance the ohmmeter set at the RX100K scale, and test as follows:

a. Disconnect the power cable plug from its re-

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-

tance values in both the power cable and the motor windings. If the resistance reading is infinity (1), the insulation is in good condition. 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 insulation 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 MAINTENANCE AND REPAIR section) and

disconnect the power cable leads. Test the

TROUBLESHOOTING PAGE D − 3

Page 21

SE SERIES OM−06489

power cable leads and motor leads separately.

e. Be certain to reconnect all leads as indi-

cated in the Wiring Diagram, Figure D-1 and seal the connections with the male and female connector sleeves before reassembling the pump head to the motor housing.

Figure D-1. Wiring Diagram

TROUBLESHOOTINGPAGE D − 4

Page 22

SE SERIES

OM−06489

PUMP MAINTENANCE AND REPAIR − SECTION E

MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPERATING PERFORMANCE.

STANDARD PERFORMANCE FOR PUMP MODEL SE1 1/2A3A 115V 1P

Based on 70F (21C) clear water at sea level with minimum suction lift. Since pump installations are seldom identical, your performance may be different due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.

Pump speed and operating condition points must be within the continuous performance range shown on the curve.

MAINTENANCE & REPAIR PAGE E − 1

Page 23

OM−01686 S SERIES PUMP

SECTION DRAWING

PARTS PAGE

Figure E-1. Pump Model SE1 1/2A3A 115V 1P

MAINTENANCE & REPAIRPAGE E − 2

Page 24

SE SERIES

PARTS LIST

Pump Model SE1 1/2A3A 115V 1P

(From S/N 1483930 Up)

ITEM

PART NAME PART

NO.

1 VOLUTE CASING 26815−033 −−− 1 2 IMPELLER 26815−045 −−− 1 3 SEAL ASSY 26815−115 −−− 1 4 DISCH FLANGE GASKET 26815−154 −−− 1

5 DISCH FLANGE 26815−432 −−− 1 6 HEX HD CAPSCREW 26815−308 −−− 2 7 LOCKWASHER 26815−368 −−− 2 8 HOSE ADAPTOR 26815−421 −−− 1

9 PUMP SPEC DECAL 38814−037 −−− 1 10 MOTOR HOUSING 26815−822 −−− 1 11 TERMINAL 26815−560 −−− 2 12 RD HD PHIL SCREW 26815−335 −−− 2 13 −W/LOCKWASHER 2 14 CENT SWITCH CONTACT 26815−194 −−− 1 15 RD HD PHIL SCREW 26815−340 −−− 2 16 −W/LOCKWASHER 2 17 FLAT WASHER 26815−374 −−− 2 18 MOUNTING PLATE 26815−163 −−− 1 19 HEX HD PHIL SCREW 26815−356 −−− 4 20 −W/LOCKWASHER 4 21 GROMMET 26815−292 −−− 1 22 GROUND WIRE 26815−601 −−− 1 23 TERMINAL 26815−562 −−− 1 24 RD HD PHIL SCREW 26815−340 −−− 1 25 −W/LOCKWASHER 1 26 FLAT WASHER 26815−374 −−− 1 27 HEAD 26815−007 −−− 1 28 AUTO CONTROL DEVICE 26815−902 −−− 1 29 CABLE LOCK 26815−441 −−− 1 30 POWER CABLE 26815−243 −−− 1 31 −W/CABLE LOCK PLATE 26815−451 −−− 1 32 HEX HD PHIL SCREW 26815−355 −−− 2 33 −W/LOCKWASHER 2 34 NAME PLATE 2613EF 13990 1 35 LIFTING ROPE 26815−650 −−− 1 36 HANDLE 26815−082 −−− 1 37 HEX HD PHIL SCREW 26815−355 −−− 2 38 −W/LOCKWASHER 2 39 MALE CONN SLEEVE 26815−927 −−− 3 40 PLUG 26815−925 −−− 3 41 FEMALE CONN SLEEVE 26815−926 −−− 3 42 RECEPTACLE 26815−924 −−− 3 43 PRESSURE TEST PLUG 26815−406 −−− 1 44 MALE CONN SLEEVE 26815−927 −−− 2 45 PLUG 26815−925 −−− 2

NUMBER

INDICATES PARTS RECOMMENDED FOR STOCK

MAT’L CODE

QTY ITEM

NO.

46 FEMALE CONN SLEEVE 26815−926 −−− 2 47 RECEPTACLE 26815−924 −−− 2 48 SOCKET 26815−929 −−− 2 49 SOCKET HOUSING 26815−928 −−− 2 50 PIN CONTACT 26815−922 −−− 1 51 PIN HOUSING 26815−922 −−− 1 52 ON POINT ASSY 26815−220 −−− 1 53 RD HD PHIL SCREW 26815−345 −−− 2 54 −W/LOCKWASHER 2 55 RD HD PHIL SCREW 26815−340 −−− 4 56 −W/LOCKWASHER 4 57 ON POINT LABEL 26815−481 −−− 1 58 OVERLOAD PROTECTOR 26815−202 −−− 1 59 RD HD PHIL SCREW 26815−342 −−− 2 60 FLAT WASHER 26815−374 −−− 2 61 HEAD GASKET 26815−156 −−− 1 62 BEARING SHIM 26815−134 −−− 1 63 BALL BEARING 23253−003 −−− 1 64 DUST SEAL 26815−123 −−− 1 65 CENT SWITCH ACTUATOR26815−184 −−− 1 66 ROTOR W/SHAFT 26815−851 −−− 1

67 SHAFT SLEEVE 26815−271 −−− 1 68 STATOR 26815−841 −−− 1 69 IMPELLER KEY 26815−054 −−− 1 70 OFF POINT LABEL 26815−482 −−− 1 71 BALL BEARING 23253−006 −−− 1 72 OFF POINT ASSY 26815−230 −−− 1 73 RD HD PHIL SCREW 26815−345 −−− 2 74 −W/LOCKWASHER 2 75 HEX HD PLUG 26815−400 −−− 1 76 VOLUTE CASING O-RING 26815−146 −−− 1

77 IMP COVER GASKET 26815−155 −−− 1 78 HEX HD PHIL SCREW 26815−350 −−− 4 79 −W/LOCKWASHER 1 80 IMPELLER COVER 26815−062 −−− 1 81 IMPELLER WASHER 26815−052 −−− 1 82 LOCKWASHER 26815−368 −−− 1 83 IMPELLER LOCK NUT 26815−053 −−− 1 84 STRAINER 26815−073 −−− 1 85 HEX HD PHIL SCREW 26815−350 −−− 3 86 −W/LOCKWASHER 3 87 HEX HD PHIL SCREW 26815−356 −−− 3 88 −W/LOCKWASHER 3

NOT SHOWN:

OM−06489

PART NAME PART

NUMBER

3 PRONG MALE PLLUG S2221 −−− 1

MAT’L CODE

QTY

MAINTENANCE & REPAIR PAGE E − 3

Page 25

OM−06489 SE SERIES

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY

Review all SAFETY information in Section A.

Follow the instructions on all tags, label and decals attached to the pump.

This pump requires little service due to its rugged, minimum-maintenance design. However, if it becomes necessary to inspect or replace the wearing parts, follow these instructions which are keyed to the sectional view (see Figure E-1) and the accompanying parts list.

This manual will alert personnel to known procedures 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 personnel to ensure that only safe, established main- tenance procedures are used, and that any procedures not addressed in this manual are performed only after establishing that neither personal safety nor pump integrity are compromised by such practices.

Before attempting to service the pump, disconnect or lock out incoming power and take precautions to ensure that it will remain inoperative. Close any valves in the discharge line.

The electrical power used to operate this pump is high enough to cause injury or death. Make certain that the plug on the pump power cable is disconnected from its receptacle before servicing.

Nuts, bolts, and screws used on this pump are metric and do not match standard English-measurement threads. If any threaded hardware is replaced, it must be replaced with metric type. Attempting to force in a fastener with English threads will damage the mating threads. An optional discharge adaptor is available to convert the metric pipe threads in the discharge flange to American pipe threads.

Use the lifting rope (35) to remove the pump from the wet well or sump, and move it to a location where the discharge line can be removed. It is not necessary to disconnect the discharge hose before removing the pump.

Pump motor maintenance 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.

PUMP END DISASSEMBLY

Follow the instructions on all tags, label and decals attached to the pump.

Do not attempt to lift the pump by the motor power cable or the piping. Use the lifting rope fitted to the pump. If chains or cable are wrapped around 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 balanced.

Select a suitable location, preferably indoors, to perform the degree of maintenance required. If the motor housing is to be opened, the work must be done in a clean, well-equipped shop. All maintenance functions must be done by qualified personnel.

Check the chart in TROUBLESHOOTING, Section D, to determine the nature of the pump problem. If

MAINTENANCE & REPAIRPAGE E − 4

Page 26

SE SERIES

OM−06489

the problem is mechanical in nature, such as worn pump parts, seal replacement, lubrication, etc., refer to PUMP END DISASSEMBLY for instructions.

If the problem is electrical, complete disassembly may not be required. Refer to Electrical Testing in TROUBLESHOOTING, Section B, and have a qualified electrician check the control box, cable and head. If the problem is determined to be in the motor, proceed with PUMP END DISASSEMBLY, followed by MOTOR DISASSEMBLY. Otherwise, see Head And Power Cable Disassembly.

Carefully inspect any O-rings or gaskets before removal and cleaning to determine if a proper seal and compression existed prior to disassembly. If sealing was faulty or questionable, the cause must be determined and corrected before reassembly. All gaskets and most O-rings must be replaced if disturbed (see the Parts List).

Strainer And Impeller Cover Removal

within a hot pump could cause the oil to spray out when the plug is removed. Remove the plug slowly and permit pressure to vent to atmosphere.

Lay the pump on its side with the drain/fill plug (75) facing up. Clean any dirt from around the plug. Remove the plug. Tip the pump and drain the seal oil into a clean container. Inspect the oil for water, dirt, or cloudy condition which could indicate lower seal failure or poor gasket seal.

Positioning Pump For Disassembly

It is recommended that the pump be positioned upside-down during disassembly. To hold the pump in the inverted position, rest the pump securely on blocks. Be careful not to damage the head (27) and power cable (30) while in this position.

Impeller Removal

To remove the strainer (84), disengage the hardware (85 and 86) securing the strainer to the impeller cover (77). To remove the impeller cover, remove the hardware (78 and 79) securing it to the pump casing (1). Remove the cover gasket (77).

NOTE

Carefully inspect any O-rings or gaskets before removal and cleaning to determine if a proper seal and compression existed prior to removal. If sealing was faulty or questionable, determine the cause and correct it before reassembly. Replace any parts as required.

If the impeller (2) is clogged, the debris can usually be removed without further disassembly.

Draining Oil From Seal Cavity

The oil should be drained from the seal cavity before performing any further disassembly

Wedge a piece of wood between the vanes of the impeller (2) and the pump casing to prevent shaft rotation. Remove the impeller hardware (81, 82 and 83).

Remove the wood block and use a suitable puller to pull the impeller off the shaft. Retain the impeller key (69).

Seal Removal

(Figures E-1 and E-2)

Remove the hardware (87 and 88) securing the pump casing (1) to the motor housing (10). Carefully slide the pump casing, dust seal (64) and shaft sleeve (67) off the shaft. Press the shaft sleeve out of the pump casing from the back side.

NOTE

The shaft sleeve (67) may not come free of the shaft when the seal chamber is removed. It may be necessary to heat the sleeve and tap it off the shaft.

Remove the pump casing O-ring (76).

The lower stationary seal seat and element will re-

Let the pump cool before removing the seal cavity drain/fill plug. Pressure built up

MAINTENANCE & REPAIR PAGE E − 5

main in the pump casing bore when removed. To remove the stationary portion of the seal, place the

Page 27

OM−06489 SE SERIES

pump casing on a clean cloth with the seal bore side down. Use a drift pin or dowel to press on alternate sides of the stationary seat until the stationary element and seat are forced out of the bore.

Inspect the dust seal (64) and, if replacement is required, use a drift pin or dowel to press the dust seal out of the pump casing bore.

Lubricate the rotor shaft (66) adjacent to the bellows assembly, and pull the rotating portion of the seal from the shaft.

Slide a pair of stiff wires with hooked ends along the shaft and use the wires to pull the upper stationary seal seat and element from the motor housing (10).

NOTE

Do not disassemble the motor unless it is necessary and a clean, well-equipped shop is available. If the motor housing components are to be serviced, see MOTOR DISASSEMBLY in this section. Do not reassemble the pump end components at this time.

If no further disassembly is required, proceed to the appropriate areas in PUMP END REASSEMB- LY.

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 Orings and gaskets, and clean the sealing surfaces of dirt or gasket material. Be careful not to scratch gasket surfaces.

Most cleaning solvents are toxic and flammable. Use them only in a well ventilated area free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent containers.

Inspect the rotor shaft (74) for damaged threads, scoring, or nicks. Remove nicks and burrs with a fine file or emery cloth to restore original contours. If the shaft is bent or severely damaged, the rotor and shaft must be replaced as an assembly (see

MOTOR DISASSEMBLY).

Seal Installation

(Figures E-1 and E-2)

PUMP END REASSEMBLY

NOTE

Reuse of old O-rings, gaskets, or shaft seal parts will result in premature leakage or reduced pump performance. It is strongly recommended that new gaskets and shaft seal assemblies be used during reassembly (see the parts lists for numbers).

Cleaning And Inspection Of Pump Parts

With the pump inverted, stuff a clean tissue into the stationary seal seat bore of the motor housing (10) or wrap a small rag around the shaft to prevent foreign material from entering the motor cavity.

Carefully inspect any O-rings or gaskets before removal and cleaning to determine if a proper seal and compression existed prior to disassembly. If sealing was faulty or questionable, the cause must

The shaft seal assembly (3) should not be reused because wear patterns on the finished faces cannot be realigned during reassembly. This could result in premature failure. If necessary to reuse an old seal in an emergency, carefully wash all metallic parts in fresh cleaning solvent and allow to dry thoroughly.

Handle the seal parts with extreme care to prevent damage. Be careful not to contaminate the precision 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 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 leakage. If any components are worn, replace the complete seal; never mix old and new seal parts.

Install the shaft seal as illustrated in Figure E-2.

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OM−06489

ROTOR SHAFT

MOTOR HOUSING

BELLOWS AND CAGE ASSY

STATIONARY SEAT

PUMP CASING

DUST SEAL

STATIONARY SEAT

STATIONARY ELEMENT

ROTATING ELEMENT

SPRING

ROTATING ELEMENT

STATIONARY ELEMENT

SHAFT SLEEVE

IMPELLER KEY

Figure E-2. Seal Assembly

This seal is not designed for operation at temperatures above 120 F (49 C). Do not use at higher operating temperatures.

Do not unwrap a new seal assembly until time of installation. Cleanliness of seal components is critical, especially the seal faces.

Carefully remove the material stuffed into the seat bore (or unwrap the shaft). Be sure no debris stopped by the material falls into the mounting plate.

NOTE

When pressing seal components onto the shaft, use hand pressure only. A push tube cut from a length of plastic pipe will aid in installing seal components. The I.D. of the push tube should be approximately the same as the I.D. of the seal spring.

IMPELLER

Unpack the stationary seat and stationary element. Place a clean tissue over the sealing face of the stationary element and subassemble the stationary element into the stationary seat.

Apply a light coating of oil to the seal seat bore in the motor housing (10). Position the stationary subassembly in the motor housing 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 concentric pattern. After cleaning, apply a drop light oil to the seal face.

Unpack the rotating portion of the seal. Be certain the sealing faces of the rotating elements are free of grit or surface damage. Make sure the drive grooves of the rotating elements fully engage the drive lugs of the bellows retainer.

Apply a light coating of oil to the I.D. of the bellows. Slide the rotating portion of the seal onto the shaft until the upper sealing faces contact. The seal

MAINTENANCE & REPAIR PAGE E − 7

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OM−06489 SE SERIES

spring cannot be compressed and held in place until the pump casing is installed.

Unpack the lower stationary seat and element. Place a clean tissue over the sealing face of the stationary element and subassemble the stationary element into the stationary seat.

Apply a light coating of oil to the seal seat bore in the pump casing (2). Position the stationary subassembly in the pump casing 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 concentric pattern. After cleaning, apply a drop light oil to the seal face.

Inspect the face of the lower rotating element to make certain that it is clean. If cleaning is necessary, use a clean tissue to wipe lightly in a circular pattern. After cleaning, apply a drop of light oil to the seal face.

Carefully position the assembled pump casing, stationary seat and element over the shaft until the sealing faces contact. Secure the pump casing to the motor housing by tightening the hardware (87 and 88) in an alternating pattern.

Position the shaft sleeve (67) on the shaft with the chamfer on the O.D. toward the impeller end of the pump, and slide the sleeve onto the shaft until fully seated.

Postion the dust seal (64) in the pump casing bore as shown in Figure E-1 and press it into the pump casing until fully seated.

Install the impeller hardware (81, 82 and 83). Wedge a block of wood between the vanes of the impeller to prevent shaft rotation, and tighten the impeller lock nut (83).

Remove the block of wood, and turn the impeller to check for free rotation. Check the front clearance after installing the impeller cover (80).

Install the impeller cover gasket (77). Position the impeller cover (80) over the pump casing (1) and secure the cover with the hardware (78 and 79).

Impeller Clearance

For best performance, there should be a clearance of .010 to .020 inch (0,25 to 0,51 mm) between the impeller cover and the face of the impeller. Use a feeler gauge to measure this clearance.

If the impeller scrapes against the back of the impeller cover when the impeller is turned by hand, remove the impeller cover and add another impeller cover gasket (77). Reinstall the impeller cover, and recheck clearance.

Strainer Installation

Inspect the strainer (84) for cracks, distortion or erosion, and replace it if defective.

Position the strainer squarely on the shoulder of the impeller cover (80) and secure with the hardware (85 and 86). Make certain that the strainer seats properly against the shoulder of the impeller cover.

See VACUUM/PRESSURE TESTING and LU- BRICATION before putting the pump back into service.

MOTOR DISASSEMBLY

Impeller Installation

Inspect the impeller (2) for cracks, broken vanes, or wear from erosion, and replace it if damaged. Clean the threads on the rotor shaft to remove any old thread locking material.

Install the impeller key (69) in the shaft keyway, align the impeller keyway, and press the impeller onto the shaft until it seats firmly against the shaft sleeve.

Disassembly of the motor is rarely required except to replace the rotor, stator, bearings or motor housing. Do not disassemble the motor unless it is necessary and a clean, well-equipped shop is available.

NOTE

It is recommended that a pump with a defective motor be returned to Gorman-Rupp, or to one of the Gorman-Rupp authorized Submersible Repair Centers.

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The electrical power used to operate this pump is high enough to cause injury or death. Make certain that the plug on the pump power cable is disconnected from its receptacle before servicing.

Head And Power Cable Removal

Total disassembly of the head (27) and power cable (30) is not always required. Disassemble and replace only the parts proven defective by inspection or testing. See Electrical Testing in TROUBLESHOOTING.

The head and power cable may be serviced without disassembling the motor housing or pump end, or without draining the oil from the motor cavity. However, the oil must be drained before attempting to disassemble the motor housing and components.

Secure the pump in an upright position. Remove the hardware (19 and 20) securing the head to the motor housing (10). Raise the head for access to the electrical connections.

Pull the male and female connector sleeves (39 and 41) apart, then pull the lead plugs (40) from the auto control device (28) and ground lead (22) out of the cable receptacles (42). Disengage the white wire from the socket housing (49) to the on point assembly (52).

OM−06489

If necessary, remove the remaining hardware (37 and 38) securing the handle to the head.

If the auto control device (28) requires replacement, pull the male and female connector sleeves (44 and 46) apart, then pull the lead plugs (45) from the red stator lead and overload protector (58) out of the receptacles (47) on the auto control device leads. Disengage the hardware (55 and 56) securing the auto control device to the mounting plate (18).

To remove the auto control device, separate any remaining connector sleeves, plugs and receptacles. Separate the pin and socket housings (49 and 51). If necessary, remove the socket and pin contacts (48 and 50).

Remove the hardware (59 and 60), disconnect the motor lead and remove the overload protector (58).

Using caution not to strain any electrical leads, lift the mounting plate (18) while guiding the electrical leads through the grommet (21) to access the centrifugal switch contact (14). Remove the hardware (12 and 13) and separate the motor lead terminals (11) from the contact. Disengage the hardware (15 and 16) to remove the centrifugal switch contact.

Carefully remove the mounting plate; the bearing shim (62) will become a free part. If required, disengage the hardware (24 and 25) securing the green ground lead (22) to the mounting plate.

NOTE

The centrifugal switch actuator (65) is a press fit onto the rotor shaft and cannot be removed until the rotor is removed.

See Head And Power Cable Installation if no fur- ther disassembly is required.

Rotor And Shaft Removal

Remove the assembled head and power cable. Remove the head gasket (61).

To disconnect the power cable from the head, remove the hardware (32 and 33) securing the cable lock (29) and handle (36) to the head. Remove the hardware (37 and 38) and pull the cable out of the head.

MAINTENANCE & REPAIR PAGE E − 9

See PUMP END DISASSEMBLY and remove all pump end components and Head And Power Cable Removal and remove the head and cable.

Carefully lift the rotor/shaft (66) with assembled bearings (63 and 71) and centrifugal switch actuator (65) from the motor housing. Use caution to prevent the rotor from falling on the stator windings. If

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OM−06489 SE SERIES

necessary, tap the impeller end of the rotor shaft with a block of wood or soft-faced mallet to loosen the seal between the bearing and the motor housing bore.

Bearing Removal

To prevent damage during removal from the shaft, it is recommended that bearings be cleaned and inspected in place. It is strongly recommended that the bearings be replaced any time the shaft and rotor assembly is removed.

Before removing the bearings from the rotor shaft, clean and inspect the bearings in place as follows.

Clean the bearings thoroughly in fresh cleaning solvent. Dry the bearings with filtered compressed air and coat with light oil.

location of the actuator on the shaft. Use a suitable puller to remove the actuator from the shaft.

Stator Removal

Do not remove the stator (68) unless it is defective (open windings, insulation resistance low, or stator core damaged).

To remove the stator, position an expandable tool, such as a split disc, approximately 2 inches (51 mm) inside the stator, and expand it tightly and squarely on the I.D. Attach a lifting device to the lifting eye of the tool, and raise the assembly approximately 1 inch (25 mm) off the work surface. Take care not to damage the stator end turns.

The motor housing (10) must be heated with a torch to expand it enough for the stator to be removed. Apply heat evenly to the outside of the motor housing; excessive heat is not required. When the motor housing is sufficiently heated, use a softfaced mallet to rap alternate edges of the motor housing, and walk" the stator out. Continue this process until the stator clears the motor housing.

Most cleaning solvents are toxic and flammable. Use them only in a well ventilated area; free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent containers.

Rotate the bearings by hand to check for roughness or binding. If rotation is rough, replace the bearings.

The bearing tolerances provide a tight press fit onto the shaft and a snug slip fit into the upper and lower mounting plates. Replace the shaft and rotor (as an assembly) or the mounting plates if the proper bearing fit is not achieved.

If replacement is required, use a bearing puller to remove the bearings from the rotor shaft.

Centrifugal Switch Actuator Removal

Remove the snap ring securing the switch actuator to the shaft. Use a felt tip ink marker to scribe the

Use caution not to damage the stator end turns during removal from the motor housing.

After the stator has been removed, wrap it in clean, dry rags or other suitable material until reassembly. The stator must be kept clean and dry. When handling the stator, do not set it on the end windings; lay it on its side.

Do not attempt to rewind the stator. Winding tolerances and materials are closely controlled by the manufacturer, and any deviation can cause damage or operating problems. Replace the stator, or return it to one of The Gorman-Rupp Authorized Submersible Repair Centers or The GormanRupp factory, if defective.

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OM−06489

MOTOR REASSEMBLY

NOTE

Reuse of old O-rings, gaskets, shaft seal parts will result in premature leakage or reduce pump performance. It is strongly recommended that new gaskets and shaft seal assemblies be used during reassembly (see the parts lists for numbers).

Clean all gasket and O-ring surfaces, completely removing any old gasket and cement material. Inspect the sealing surfaces for burrs, nicks and pits which could cause a poor seal, and replace defective parts as required.

Thoroughly clean the inside of the motor housing (10) with fresh solvent. The interior must be dry and free of dirt or lint.

that no damage has occurred during transit or handling.

NOTE

Remove any drops of varnish from the ends of the stator before installation to ensure proper stack-up height when assembled.

Position an expandable tool, such as a split disc, approximately 2 inches (51 mm) down inside the stator (opposite the lead wire end), and expand it tightly and squarely on the I.D. Attach a lifting device to the lifting eye of the tool, and carefully lift the assembly. Take care not to damage the stator end turns. Slip a sleeve over the stator leads, or tape them together to protect them during installation.

NOTE

Stator installation involves heating the motor housing. This process must be done quickly to allow the stator to slide into the motor housing before the housing cools.

Most cleaning solvents are toxic and flammable. Use them only in a well ventilated area, free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent containers.

Stator Installation

NOTE

Stator installation involves heating the motor housing. This process must be done quickly, therefore it is recommended that these steps be performed by two people to promote efficient installation of the stator.

After the motor housing is thoroughly cleaned, position it on a flat surface with the discharge end down. Do not unwrap the stator (68) until the motor housing has been prepared for stator installation. The stator must be kept clean and dry. When handling the stator, do not set it on the end windings; lay it on its side and block it from rolling.

Test the new stator as indicated in Electrical Test- ing in TROUBLESHOOTING, Section B, to ensure

Heat the motor housing with a torch to expand it enough for the stator to be installed; when heating the motor housing, make sure that the stator is clear to avoid a fire hazard or damage to the windings. Apply heat evenly to the outside of the housing; excessive heat is not required.

When the motor housing is sufficiently heated, position the stator so that the leads are in line with the terminal opening. Carefully lower the stator into the motor housing until fully seated against the housing shoulder. Be careful not to damage the stator lead insulation during reassembly. If the stator cocks" in the motor housing, remove it and try again.

After the stator is fully and squarely seated on the motor housing shoulder, remove the expandable disc tool. Untape or remove the protective sleeve from the stator leads.

Cover the motor housing with a clean, lint-free cloth while the rotor is being assembled.

Centrifugal Switch Actuator Installation

Press the centrifugal switch actuator (65) on the rotor shaft so that the actuator flange sits just flush with the snap ring groove. The lower side should

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OM−06489 SE SERIES

align with the scribed mark on the shaft. Secure the switch with the snap ring.

Bearing Installation

Inspect the rotor shaft for damaged threads, scoring in the seal area, and a nicked or damaged keyway. If the bearings were removed, inspect the bearing areas for scoring or galling. Remove nicks and burrs with a fine file or emery cloth. Inspect the rotor area for separated laminations. If the shaft is bent or damaged, or if the laminations are separated, replace the shaft and rotor (a single assembly).

The bearings may be heated to ease installation. An induction heater, hot oil bath, electric oven, or hot plate may be used to heat the bearings. Bearings should never be heated with a direct flame or directly on a hot plate.

After the bearings have been installed and allowed to cool, check to ensure that they have not moved out of position in shrinking. If movement has occurred, use a suitably sized sleeve and a press to reposition the bearings. Make certain that they are seated squarely against the shaft shoulders.

If heating the bearings is not practical, use a suitably sized sleeve and an arbor (or hydraulic) press to install the bearings on the shaft.

When installing the bearings onto the shaft, never press or hit against the outer race, balls, or ball cage. Press only on the inner race.

Rotor And Shaft Installation

With the stator installed and the motor housing upright, carefully ease the rotor/shaft (66) and assembled bearings through the stator so that the lower bearing (71) seats squarely in the bore of the motor housing (10).

Wrap the impeller end of the shaft in a clean cloth to protect it during installation of the head and power cable.

NOTE

If a hot oil bath is used to heat the bearings, both the oil and the container must be absolutely clean. If the oil has been previously used, it must be thor- oughly filtered.

Heat the bearings (63 and 71) to a uniform temperature no higher than 250F (120C). Slide the bearings onto the shaft, one at a time, until they are fully seated against the shaft shoulders. This should be done quickly, in one continuous motion, to prevent the bearings from cooling and sticking on the shaft.

Use caution when handling hot bearings to prevent burns.

Head And Power Cable Installation

The electrical power used to operate this pump is high enough to cause injury or death. Make certain that the plug on the pump power cable is disconnected from its receptacle.

Clean the exterior of the power cable with warm water and mild detergent. Check for obvious physical damage. Check the cable for continuity and insulation resistance (see Electrical Testing in TROUBLESHOOTING). Do not attempt repairs except to cut off either end of the cable; splicing is not recommended. Reinstall any wire tags or terminals which may have been removed.

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Never attempt to alter the length or repair any power cable with a splice. The pump motor and cable must be completely waterproof. Injury or death may result from alterations.

Secure the centrifugal switch contact (14) to the mounting plate (18) with the hardware (15 and 16). Secure the terminals (11) of the blue stator leads to the centrifugal switch contact.

Inspect the mounting plate grommet (21) and replace if required. Feed the remaining leads from the stator through the grommet and mounting plate.

Position the bearing shim (62) on the upper bearing (63), then carefully slide the mounting plate down over the bearing shim and upper bearing. Make certain that the bearing seats squarely in the bore.

Install the head gasket (61) on the mounting plate.

OM−06489

Install the cable lead plugs (40) in the stator lead receptacles (42), then secure with the male and female connector sleeves (39 and 41). Make certain that the green power cable ground lead is securely connected to the short ground cable, and that the ground cable is firmly attached to the mounting plate.

Refer to the wiring diagram in Section D, Trouble- shooting, and make all electrical connections. Cover all electrical lead connections with the male and female connector sleeves.

NOTE

Check the wiring diagram in Troubleshooting, Section D to make sure that all electrical leads are

correctly installed.

Position the head (27) on the motor housing (10) and secure with the hardware (19 and 20).

See PUMP END REASSEMBLY to reassemble the pump end components.

See VACUUM TESTING followed by LUBRICA- TION.

Secure the overload protector (58) to the mounting plate with the hardware (59 and 60). Secure the green ground lead to the mounting plate with the hardware (24, 25 and 26).

Connect the terminal of the green ground wire to the mounting plate and secure with the hardware (23, 24 and 25). Make certain the terminal makes good contact with the plate.

Feed the red, yellow, white and gray auto control device leads from the bottom of the device up through the hole in the device. If required, install the socket contacts (48) on the white and gray auto control device leads, and install the contacts in the socket housing (49). Secure the auto control device to the mounting plate with the hardware (55 and 56).

Install the cable lock (28) on the power cable (37). Lubricate the bore of the head (27) and install the power cable through the bore. Secure the cable to the head with the cable lock plate (31) and hardware (37 and 38). Secure the cable lock and handle (36) to the head with the hardware (32 and 33).

VACUUM/PRESSURE TESTING

To ensure the water-tight integrity of the pump, it is recommended that the motor and seal cavities be vacuum and pressure tested any time the seal and/ or motor are serviced. The seal cavity must be pressurized to prevent separation of the seal faces or unseating the stationary seal seat between the seal and motor cavities. Use a manometer with a range of 30 to 0 to 30 inches of mercury to perform the vacuum test. Do not use a vacuum gauge. Vacuum gauges are not sensitive enough to detect minor leaks.

Drain all of the oil from both the seal and motor cavities before performing the test. Oil within the motor cavity will be drawn into the system, resulting in damage to the vacuum pump or manometer.

It is recommended that a vacuum pump be used to draw the vacuum on the motor cavity. If a vacuum pump is not available, a compressor/venturi system may be used. If the compressor/venturi cannot draw the vacuum level shown in Table E-1, draw the motor cavity vacuum down as far as the system

MAINTENANCE & REPAIR PAGE E − 13

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OM−06489 SE SERIES

will allow, then pressurize the seal cavity so the differential between the two cavities is the same as the differential between the readings shown in the table.

If a compressor/venturi system is used, install fullclosing ball-type shutoff valves with quick-disconnect fittings in the pipe plug holes in both the motor

Vacuum Pump

Venturi

Air Compressor

Manometer

Tee

Quick Disconnect Fitting

and seal cavities. This will allow the pressure (or vacuum) to be maintained while using the compressor to perform the second portion of the test.

Figure E-3 shows a simple schematic for setting up either a vacuum pump or a venturi/compressor test system.

Quick Disconnect Fitting

Full-Closing Ball-Type Shutoff Valve

Use Compressor to Pressure Test Seal Cavity

Vacuum Test Motor Cavity

Submersible Pump

Figure E-3. Vacuum/Pressure Test System

Table E-1 shows the motor cavity vacuum and seal cavity pressure readings for the test, and the duration to maintain each reading. Any change in the

Table E-1. Vacuum/Pressure Test Data

Pump

Model

S1 1/2A3A 30 1 15 1

Motor Cavity

Vacuum

(In. Hg.)

(Minutes)

LUBRICATION

Seal Cavity

Check the oil level in the seal cavity before initial startup, after the first two weeks of operation, and every month thereafter.

readings during the test indicates a leak which must be identified and corrected before putting the pump back into service.

Duration

seal cavity can cause hot oil to be ejected as the plug is removed.

To check the seal cavity oil, lay the pump on its side and remove the seal cavity drain/fill plug (75) in the motor housing. Tip the pump and drain off a small amount of oil into a transparent cup. If the oil level is abnormally low, or the color milky or dark, refer to Draining Oil From Seal Cavity in this section for instructions and troubleshooting tips.

Seal Cavity

Pressure

(PSI)

Duration

(Minutes)

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

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OM−06489

To fill the seal cavity, remove the seal cavity drain/fill plug (75) and add 7 ounces (0,2 liter) of SAE No. 10 non-detergent oil. Refer to Section B, Installation , for positioning of the pump during filling of the seal cavity. Apply ‘Loctite Pipe Sealant With Teflon No.

592.’ or equivalent to the threads of the pipe plug,

before reinstalling the plug.

Motor Cavity

The motor cavity is cooled by the liquid being pumped. No further lubrication is required.

MAINTENANCE & REPAIR PAGE E − 15

Page 37

For U.S. and International Warranty Information,

Please Visit www.grpumps.com/warranty

or call:

U.S.: 419−755−1280

International: +1−419−755−1352

For Canadian Warranty Information,

Please Visit www.grcanada.com/warranty

or call:

519−631−2870

THE GORMAN-RUPP COMPANY  MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED  ST. THOMAS, ONTARIO, CANADA