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GORMAN-RUPP SM Series Maintenance And Repair With Troubleshooting

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PUBLICATION NUMBER MR-- 05365
April 1, 2002
SM SERIES PUMPS
SM4G'S AND SM4J'S
All Materials And Voltages
THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO
GORMAN-RUPP OF CANADA LIMITED
ST. THOMAS, ONTARIO, CANADA
D
Printed in U.S.A.
e
Copyright by the Gorman-Rupp Company

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  • Page 1 PUBLICATION NUMBER MR-- 05365 April 1, 2002 SM SERIES PUMPS SM4G’S AND SM4J’S All Materials And Voltages THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA Printed in U.S.A. Copyright by the Gorman-Rupp Company...
  • Page 2 MR-- 05365 SM SERIES PUMPS INTRODUCTION Thank You for purchasing a Gorman-Rupp SM quire special attention, to those which could dam- age equipment, and to those which could be dan- Series Pump. Read this manual carefully to learn gerous to personnel. However, this manual cannot how to safely maintain and service your pump.
  • Page 3 MSHA. below. Your Gorman-Rupp distributor needs this Please note that should the equipment be abused information when you require parts or service.
  • Page 4 4. Close the discharge valve (if throughout this manual to Gorman- used). Rupp SM Series submersible motor driven pumps. This manual will alert personnel to known procedures which require spe- This pump is not designed to pump vol- cial attention, to those which could atile, explosive, or flammable materials.
  • Page 5 Any control box used to operate the mal operating temperatures can be high pump must be approved by the MSHA enough to cause burns. The tempera- and the Gorman-Rupp Company for the ture will be especially high if operated application. against a closed discharge valve. Never...
  • Page 6 MR-- 05365 SM SERIES PUMPS operate against a closed discharge lift it, make certain that they are posi- valve for long periods of time. tioned so as not to damage the pump, and so that the load will be balanced.
  • Page 7 MR-- 05365 SM SERIES PUMPS TROUBLESHOOTING --- SECTION B Review all SAFETY information in Section A. 5. Close the discharge valve (if used). The following precautions should be taken before attempting to service the The electrical power used to operate pump;...
  • Page 8 SM SERIES PUMPS MR-- 05365 Table B-1 Troubleshooting Chart (continued) TROUBLE CAUSE REMEDY MOTOR RUNS, BUT Discharge head too high. Reduce discharge head, or install staging PUMP FAILS TO DE- adaptor and additional pump. LIVER RATED DIS- CHARGE Low or incorrect voltage.
  • Page 9 It is recommended that a pump with a defective mo- b. Use an amprobe or equivalent meter to tor be returned to Gorman-Rupp, or to one of the measure the current draw of each phase Gorman-Rupp authorized Submersible Repair en- while the pump is running at full load and at ters.
  • Page 10 SM SERIES PUMPS MR-- 05365 Insulation Resistance tion. If the reading is between infinity (1) and 1 megohm, the insulation is acceptable To check insulation, zero-balance the ohmmeter but should be rechecked periodically. If the set at the RX100K scale, and test as follows: reading is less than 1 megohm, the insula- tion should be checked more closely;...
  • Page 11 MR-- 05365 SM SERIES PUMPS PUMP MAINTENANCE AND REPAIR --- SECTION C GENERAL INFORMATION formed by a Gorman-Rupp authorized Submersible repair facility or the factory. Any repairs to the motor assembly per- Review all SAFETY information in Section A. formed by the customer or an unautho- rized repair facility negates the warranty.
  • Page 12 SM SERIES PUMPS MR-- 05365 SECTION DRAWING Figure C-1. Typical SM4G And SM4J Series Pump Assembly PAGE C -- 2 MAINTENANCE AND REPAIR...
  • Page 13 MR-- 05365 SM SERIES PUMPS Typical SM4G And SM4J Series Pump Assembly Parts Identification List Refer to the separate Parts List Manual for serviceable parts, part numbers and quantities. ITEM ITEM PART NAME PART NAME SUCTION HEAD BUSHING THREADED ROD...
  • Page 14 SM SERIES PUMPS MR-- 05365 SECTION DRAWING Figure C-2. SM4G’s And SM4J’s Terminal Housing & Cable Assembly PAGE C -- 4 MAINTENANCE AND REPAIR...
  • Page 15 MR-- 05365 SM SERIES PUMPS SM4G’s And SM4J’s Terminal Housing & Cable Assembly Refer to the separate Parts List Manual for serviceable parts, part numbers and quantities. ITEM PART NAME TERMINAL GLAND 50 FT. CABLE ASSEMBLY CABLE CLAMP CABLE GRIP...
  • Page 16 SM SERIES PUMPS MR-- 05365 PUMP END DISASSEMBLY removing the pump. If rigid discharge piping is used, disconnect the piping before attempting to move the pump. References are to Figure C-1 and Figure C-2. Review all SAFETY information in Section A.
  • Page 17 MR-- 05365 SM SERIES PUMPS PUMP END DISASSEMBLY Positioning Pump For Disassembly (Figure C-1) Strainer Removal It is recommended that the pump be positioned upside-down during disassembly. To hold the (Figure C-1) pump in the inverted position, screw a pipe in the...
  • Page 18 SM SERIES PUMPS MR-- 05365 portion of the seal. Carefully slide the rotating por- back side of the seat, and pull the stationary seat tion of the seal assembly off the shaft. and O-ring from the lower motor housing. With the pump inverted, stuff a clean tissue into the...
  • Page 19 MR-- 05365 SM SERIES PUMPS sparks, and flame. Read and follow all Handle the seal parts with extreme care to prevent precautions printed on solvent contain- damage. Be careful not to contaminate the preci- sion finished faces; even fingerprints on the faces ers.
  • Page 20 SM SERIES PUMPS MR-- 05365 er. The grease should hold the element in position until the seal is installed. Apply a light coating of oil to the seal seating sur- This seal is not designed for operation at face on the shaft, the groove for the retaining ring temperatures above 160_ F (71_ C).
  • Page 21 MR-- 05365 SM SERIES PUMPS NOTE the seal plate and assembled stationary portion of the seal over the shaft and press the seal plate into After the impeller has been properly positioned, the lower motor housing (47) until fully seated. Be check for free rotation.
  • Page 22 NOTE It is recommended that a pump with a defective mo- Total disassembly of the terminal housing and tor be returned to Gorman-Rupp, or to one of the power cable assembly (43) is not always required. Gorman-Rupp authorized Submersible Repair Disassemble and replace only the parts proven Centers.
  • Page 23 MR-- 05365 SM SERIES PUMPS equipment. Removing the housing in an power cable leads from the terminal collars, and explosive atmosphere could cause fire separate the terminal plate from the terminal hous- ing (10). Remove the upper terminal plate gasket or explosion.
  • Page 24 SM SERIES PUMPS MR-- 05365 Temperarily secure the suction head to the Clean the bearings thoroughly in fresh cleaning threaded rods (2) with the nuts (3). Hook a three- solvent. Dry the bearings with filtered compressed leg sling to the suction head. Attach a suitable hoist air and coat with light oil.
  • Page 25 If the stator must be removed, re- problems. Replace the stator, or return it to move the terminal housing as indicated in Termi- one of The Gorman-Rupp Authorized Sub- nal Housing And Power Cable Disassembly. mersible Repair Centers or The Gorman- Rupp factory, if defective.
  • Page 26 SM SERIES PUMPS MR-- 05365 wool or a wire brush to remove excess paint from When the motor housing is sufficiently heated and the I.D. of the motor housing before reassembly. the stator painted, position the stator so that the leads are in line with the terminal opening.
  • Page 27 MR-- 05365 SM SERIES PUMPS hot plate may be used to heat the bearings. Bear- ings should never be heated with a direct flame or directly on a hot plate. Use caution when handling hot bearings to NOTE prevent burns.
  • Page 28 SM SERIES PUMPS MR-- 05365 grease to the O-rings (14) and install them in the sulation resistance (see Electrical Testing in TROUBLESHOOTING). Do not attempt repairs grooves on the bearing cap. except to cut off either end of the cable; splicing is Install the O-ring (10) on the lower motor housing.
  • Page 29 Figure C-2. NOTE Slide the upper terminal plate gasket up over the Use only materials approved by Gorman-Rupp for power cable leads. field repairs. NOTE Both the power cable and motor conductor leads should be tinned prior to reassembly.
  • Page 30 SM SERIES PUMPS MR-- 05365 mum) of silicone adhesive around each of the ter- Slide the terminal washer (9) down the cable and minal posts as shown in Figure C-7. Remove any into the upper bore of the terminal housing. Oil the adhesive from gasketed surfaces.
  • Page 31 MR-- 05365 SM SERIES PUMPS Connect the discharge hose, and reposition the Use a manometer with a range of 30 to 0 to 30 inch- pump. If rigid piping or long hose is used, reposi- es of mercury to perform the test. Do not use a vac- tion the pump then connect the piping.
  • Page 32 SM SERIES PUMPS MR-- 05365 Make from commercially available steel plate. 1.5 in. (38,1 mm) .438” (11,1 mm) dia. drill thru. Tap .250-18 NPT. 5.5 in. 4.246 -- 4.244 in (139,7 mm) (107,9 -- 107,8 mm) .44” (11,2 mm) dia. drill...
  • Page 33 MR-- 05365 SM SERIES PUMPS The grade of lubricant used is critical to the opera- Motor Bearings tion of this pump. Use uninhibited transformer oil (Figure C-1) as specified in Table C---3. The motor is cooled by the constant flow of the liq- Table C-2.
  • Page 34 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 D MANSFIELD, OHIO GORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ONTARIO, CANADA...

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