GORMAN-RUPP PUMPS JS Series Maintenance And Repair With Troubleshooting Download Page 1

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PUBLICATION NUMBER MR−03955
August 9, 1993

THE GORMAN-RUPP COMPANY

MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED

ST. THOMAS, ONTARIO, CANADA

Printed in U.S.A.

JS SERIES PUMPS

MOTOR FRAME SIZE 4

APPROVED

X-PROOF MOTORS FOR CLASS 1,

DIV. 1, GROUPS C & D LOCATIONS

Summary of Contents for JS Series

Page 1: ...ORMAN RUPP COMPANY D MANSFIELD OHIO GORMAN RUPP OF CANADA LIMITED D ST THOMAS ONTARIO CANADA Printed in U S A eCopyright by the Gorman Rupp Company JS SERIES PUMPS MOTOR FRAME SIZE 4 FM APPROVED X PROOF MOTORS FOR CLASS 1 DIV 1 GROUPS C D LOCATIONS ...

Page 2: ...nd injury or death to personnel can result Contact the factory for the authorized repair facility closest to you The pump is driven by a water proof explosion proof submersible electric motor that is FM ap proved for Class 1 Division 1 Group C and D loca tions If there are any questions regarding the pump which are not covered in this manual or in other lit erature accompanying the unit please con...

Page 3: ...ents must be per formed by a Gorman Rupp authorized repair facil ity or the factory Any repairs to the motor assembly performed by the customer or an unauthorized re pair facility negates the FM Approval and the motor warranty The following are used to alert personnel to procedures which require special attention to those which could damage equipment and to those which could be dangerous to person...

Page 4: ...w all safety re quirements for confined space entry Failure to observe these requirements could result in injury or death to person nel The electrical power used to operate this pump is high enough to cause inju ry or death Obtain the services of a qu alified electrician to make all electrical connections Do not connect the pump motor directly to the incoming power lines The pump motor is designed...

Page 5: ...e lifting device is securely positioned in the center of the pump lifting device If chains or cables 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 If this pump is used to handle liquids which may cause illness or disease through direct exposure take neces sary precautions during maintenance and repair...

Page 6: ...e the discharge valve if used NOTE Many of the probable remedies listed below re quire use of electrical test instruments for specific procedures see ELECTRICAL TESTING following the chart No power to motor Check for blown fuse or open circuit breaker Impeller jammed Check Impeller disassemble and repair as necessary Motor voltage or control box incompat Check ratings on pump nameplate ible defect...

Page 7: ... if possible Impeller worn or damaged Replace Insufficient liquid in wet well Stop pump until liquid level rises install liquid level devices Clogged suction port or impeller Clear blockage reset overload causing motor to overload device in control box Motor overheated thermal switch Allow pump to cool tripped Moisture sensing device tripped Return pump to factory or authorized repair facility Mot...

Page 8: ...asure the voltage at the control box with 1 The pump off 2 The pump running in air 3 The pump submerged and running under full load The voltage measured under each condition must be the same b If voltage is balanced when the pump is off but is imbalanced when the pump is running thoroughly check the power source all inter connecting cables and the pump motor to isolate the defect c Use an Amprobe ...

Page 9: ... lead to each of the motor cable leads in turn Note the readings b Readings will indicate resistance values in both the power cable and motor windings If resistance reads infinity 1 insulation is good If resistance reads between infinity 1 and 1 megohm insulation is acceptable but should be rechecked regularly If resistance reads less than 1 megohm insulation should be checked more closely and fre...

Page 10: ...ump other than seal impeller and other hydraulic components must be per formed by a Gorman Rupp authorized re pair facility or the factory Any repairs to the motor assembly performed by the custom er or an unauthorized repair facility ne gates the FM Approval and the motor war ranty This Maintenance and Repair Manual provides troubleshooting and maintenance instructions re quired to properly diagn...

Page 11: ...JS SERIES PUMPS MR 03955 FM APPROVED MAINTENANCE AND REPAIR PAGE C 2 SECTION DRAWING Figure C 1 Typical JS Series Motor Frame Size 4 Pump Assembly ...

Page 12: ... Frame Size 4 Pump Assembly Part Identification List Refer to the separate Parts List Manual for serviceable parts part numbers and quantities 1 MOTOR ASSEMBLY 5 IMPELLER 6 IMPELLER KEY 10 IMPELLER SCREW 11 VOLUTE CASING 13 SCREW 31 RUBBER SEAL 38 GUIDE SHOE 41 CAPSCREW 53 NAMEPLATE 54 RIVET 74 ADJUSTING SCREW ...

Page 13: ...JS SERIES PUMPS MR 03955 FM APPROVED MAINTENANCE AND REPAIR PAGE C 4 SECTION DRAWING Figure C 2 JS Series Motor Frame Size 4 Seal Area Detail ...

Page 14: ...a Detail Part Identification List Refer to the separate Parts List Manual for serviceable parts part numbers and quantities 213 LOWER BEARING HOUSING 218 UPPER SEAL ASSEMBLY 251 O RING 254 SCREW 257 SEAL HOUSING 260 LOWER SEAL ASSEMBLY 261 SEAL CLAMP 264 LOCKING RING 265 RETAINING RING 266 RETAINING SCREW 268 PLUG 269 O RING ...

Page 15: ...end components from the volute casing Re position the pump horizontally on a work bench or other suitable surface for further disassembly 3 If desired remove the hardware 41 and sepa rate the guide shoe 38 from the volute casing Remove the rubber seal 31 Removing Impeller 1 Remove the impeller screw 10 2 To remove the impeller use two screwdrivers to apply equal pressure 180_ apart to the back of ...

Page 16: ...er seal If sealing was faulty determine the cause before reassembling the pump After inspection remove and discard all O rings Most cleaning solvents are toxic and flammable Use them only in a well ven tilated area free from flame sparks and excessive heat Read and follow all pre cautions printed on solvent containers Reusable Parts Except Seal Assemblies 1 Thoroughly clean all reusable parts 2 In...

Page 17: ... LOCKING RING O RING ROTATING ELEMENT RETAINING SCREW UPPER SEAL ASSEMBLY LOWER SEAL ASSEMBLY Figure C 3 Seal Assemblies 1 Inspect the end of the shaft for scoring or key way damage Remove nicks and burrs with a fine file or emery cloth and restore original con tours Clean the shaft of all grit and filings 2 Lubricate the motor shaft and the seal cavity of the lower bearing housing 213 Replace the...

Page 18: ...amfer on the shaft and secure it with the re taining screws 266 NOTE See Seal Testing before assembling the remaining pump end components 9 After the pump is fully assembled lubricate the seal housing as indicated in LUBRICATION at the end of this section SEAL TESTING The seal assembly should be tested under pres sure and submerged in water before the pump end is assembled NOTE The compressed air ...

Page 19: ...must be lubricated to reduce friction and prevent corrosion 3 Lubricate the threads of the impeller screw 10 and its mating surfaces with SAE 10W 30 oil In stall the impeller screw Torque the impeller screw as described in Installing Volute Casing after the casing is installed Installing Volute Casing 1 Use a suitable lifting device to lower the motor assembly into the volute casing and secure it ...

Page 20: ...ce with one of the two screw plugs 268 in the seal housing 257 facing up slowly open the plug to release any pressure 2 Place a clean container under the lower plug remove and roll the pump on its side to drain the seal housing Condition Of Oil 1 Check the condition of the oil drained from the pump 2 If the oil is clear it can be reused 3 If the oil is milky or contains a small amount of water it ...

Page 21: ...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 D MANSFIELD OHIO GORMAN RUPP OF CANADA LIMITED D ST THOMAS ONTARIO CANADA ...

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