GE K-95352 User's Manual
Contents
1. The non reverse type of coupling as shown to the right of the motor centerline in Figure 1 is also a bolted type and in addition it keeps the pump and motor from ro tating in the reverse direction Thus it not only prevents the pump shaft GEK 95352 from unscrewing but it also pre vents damage from overspeeding and damage to water lubricated pump shaft bearings when during shutdown the residual water in the system drives the pump in the re verse direction This type of cou pling also allows up thrust from the pump to be carried by the motor bearings Motor torque is transmit ted to the pump shaft through the two halves of the coupling which are bolted together See required bolt torques The operation of a non reverse cou pling is explained as follows When the motor is started in the correct or forward direction the ratchet pins are lifted by the ratchet teeth and are held up by centrifugal force and friction when motor speed becomes high enough When power is re moved the speed decreases and the pins fall At the instant of reversal a pin will catch on a ratchet tooth and prevent backward rotation The number of pins differ from the number of teeth to multiply the number of stopping positions A very rapid decrease in speed can result in acceleration forces great enough to prevent the pins from dropping This condition is further aggravated when the pins become dirty and their action sluggish If th2. To minimize possible damage to varnish and insulation a fairly neutral non conducting type of detergent such as Du Caution bois Flow should be used A pint of detergent to 20 gallons of water is rec ommended If a steam jenny is not available the cleaning solution may be applied with warm water by a spray gun After the cleaning operation the windings should be rinsed with wa ter or low pressure steam It is ad visable to dry the winding Refer back to Insulation Resistance sec tion for instructions on how to pro ceed 4 Cleaning With Solvents Many cleaning fluids are flam mable and or toxic To prevent injury to personnel and property care should be taken to avoid flames sparks etc Safely Warning glasses should be used and contact with the skin should be avoided The area should be well ventilated or protective equipment should be used Although cleaning with water and detergent is the preferred method solvent cleaning may be used when heat drying facilities are not avail able 1 1 1 Trichloroethane is recom mended for use as the cleaning sol vent Solvent cleaning of silicone insulated winding H insulated ma chines is not recommended While 1 1 1 trichloroethane is considered to be non flammable and has a relatively low order of toxicity it should be used only in a well ventilated area that is free from open flames Avoid Warning prolonged expos
3. a bar can be inserted to keep the assembly from turning while the adjustment of pump impeller clearance is being made A coupling bolt can be screwed into one of the extra tapped holes in the top endshield to provide a stop for the bar GEK 95352 To prevent breakage coupling bolts must be tightened to torque values indicated below for bolted or non reverse couplings BoltSize Torque 1 2 90 lb ft 5 8 180lb ft 3 4 820lb ft 1 710lbft It shall be the installer s re sponsibility in all cases to as certain that these torque values Cauti are used and maintained This aution shall include those instances when the coupling comes mounted in the mo tor Failure to comply may cause the coupling bolts to break with resultant extensive damage to the equipment 2 Self Release Couplings Should the motor accidentally be run in the reverse direction the pump line shaft joints may unscrew The self release coupling acts to limit the amount of this unscrewing In normal operation torque from the motor is transmitted by the lower half coupling through the driving pins to the upper half coupling and then to the pump shaft If reversal occurs and the pump shaft starts to unscrew and lengthen the upper half of the self release coupling is lifted up off of the driving pins thus uncoupling the pump from the mo tor See Figure 1 where a self release coupling is shown to the
4. been exposed to low temperature unpack it only after it has reached the temperature of the room in which it will be unpacked or located otherwise sweating will occur lil INSTALLATION GEK 95352 Installation should be in accor dance with the National Electri cal Code and consistent with sound local practices Coupling guards should be installed as Warnin 9 needed to protect against acci dental contact with moving parts Machines accessible to personnel should be further guarded by screening guard rails or other suit able enclosure to prevent anyone from coming in contact with the equipment This is especially important for motors that are remotely or auto matically controlled or have automatic setting overload relays since such motors may start unexpectedly Failure to observe these precautions may result in injury or death to per sonnel If ignitable dust or lint is pres ent the surface temperature of space heaters if supplied should not exceed 80 of the ignition temperature Refer to Warnin 9 space heater nameplate or fac tory for information on surface temperature Dust and or lint should not be allowed to build up around the surface of space heaters Fail ure to observe these precautions may result in damage to equipment injury to personnel or both A Location and Mounting Allow enough space around the motor to permit free flow of ventilating air and to
5. dust ignition proof accessory device or con duit box since any nicks or burrs in the sealing surfaces during disassembly and reassembly may destroy the explosion proof or dust ignition proof features Failure to observe these precautions may result in damage to the equipment injury to personnel or both The SYSTEM REED CRITICAL FREQUENCY should be 25 above or below motor operating speed in order to avoid excessive vibration C Alignment of Solid Shaft Motors Accurate mechanical lineup is essential for successful operation Mechanical vi bration and roughness when the motor is running may indicate poor alignment In general lineup by straight edge across and feeler gages between coupling halves is not sufficiently accurate It is recom mended that the lineup be checked with dial indicators The space between cou pling hubs should be maintained as rec ommended by the coupling manufacturer D Couplings for Hollow Shaft Motors 1 General Vertical hollow shaft motors are designed for driving deep well tur bine type pumps and can be equipped with either self release bolted or non reverse couplings as described in following sections These couplings are located at the top of the motor and allow pump impeller position to be adjusted eas ily The type of coupling is specified by the customer Remove the top cap for access to the coupling Two slots are provided in the out side rim of the coupling so that
6. et e AN Lada 9 Non Reverse Gouplimgs HERE ETHER LEER EHE ERE ERE EYED ERE IRE 9 Power Supply and Connections eese 10 Warne and Grounding an kau AB ARARAAAU AR AR And pepe 10 Allowable Voltage and Frequency tette tte ered oe te 10 Position of Conduit BOX eerte EHE 11 VubriCatoncazcso d eels ope onde pce 11 Water Cooling eR RR SIR ee HER E ERR ERE ae 11 General eere ee eret eret ete bete RE e Pede 11 Oil Cooling Coil C Onnectiolis 5 1 n E 11 Connection Fitting Drawing eret i de de ee tette Re 12 ian M out Cr COT 12 Safety Warnings dini Lotte ele bte le nebat e ta ete te La bet epe te ole fe etate tede bebe teta 12 Steps Prior to Initial Start et ee e bees Pe eere eee bees 12 Initial rie E EE EET 14 Jogsing and Repeat Starts eren ee en i I n erre oe Ekr rere 14 Maintenance ones tapete temen pete e yd 15 Safety Warm Snes eselet ue e bebe ete bebe bete tee bed bel ed bebe fate tots 15 M 15 General Cleanliness oe tee oh devel terre der Dre derer Coria Device DE 15 Coupling Maintenance ED
7. known ground point to the bronze grounding bolt in the conduit box 2 Allowable Voltage and Frequency The power supply must agree with the motor nameplate voltage and frequency Motors will operate but with characteristics somewhat dif ferent from nameplate values on line voltages within 10 of name plate value or frequency within 5 and a combined variation not to exceed 10 3 Position of the Conduit Box When mounting conditions permit the conduit box may be turned so that entrance can be made upward downward or from either side F Lubrication Motors with oil lubricated bearings are shipped without oil Before starting the motor fill each reservoir to the standstill level shown on the sight gage Be careful to keep dirt out of the lubricant and bear ing housing Use only the oil specified on the lubrica tion nameplate or the lubrication instruc tion supplied with each motor See RELUBRICATION TABLE and LUBE NAMEPLATE for oil grade and viscosity and further instructions If reservoirs have had oil in them during storage period drain out this old oil when installing the motor for operation G Water Cooling 1 General If a bearing requires auxiliary water cooling the oil reservoir will be provided with a cooling coil whose ends are brought out to fittings in the end shield wall see Figure 2 The lubrication nameplate or in struction will specify the required water flow and the
8. left of the shaft center line NOTE THAT SELF RELEASE COU PLINGS CANNOT CARRY UP THRUST Proper functioning of a self release coupling depends upon several fac tors The pump shaft adjusting nut must be securely attached to the top half coupling and the top half coupling must not bind on the lower half Otherwise the adjusting nut lock screw may break instead of the coupling halves separating Should this happen the motor would con tinue to drive the pump line shaft and the joints would continue to un screw Serious damage to both mo tor and line shaft may result Clear ance between the coupling halves should be checked by placing the top half coupling in position prior to installing the motor It should drop into place and rest solidly on the lower half coupling without forc ing Proper alignment of the pump head shaft within the motor hollow shaft is also important After the coupling releases it no longer holds the pump shaft centered If the alignment is not good the motor shaft which 1s still rotating may rub the pump shaft which has stopped and damage will result A third requirement is that the dis tance between the top of the pump shaft and the inside of the top cap be at least enough to allow the top half coupling when it tries to release to clear the pins before the shaft hits the cap Check this clearance after the adjusting nut has been drawn up to its final position To facilitate ma
9. maintain an ambient temperature not over 40 C Where a choice of locations is pos sible install the motor so that it will be subjected to the least amount of dirt dust liquids or other harmful materials Mount the motor securely on a level firm foun dation align accurately with the driven equipment and tighten mounting bolts securely Weather Protected Type I motors may be installed in indoor locations with rela tively high moisture content or sheltered outdoor locations in dry climates Weather Protected Type II motors may be installed outdoors Use filters in unclean areas A Pump and System Precautions Some precautions are necessary to assure satisfactory operation of motors in pumping service The packing gland in the pump head should be kept in good condition so that the liquid being pumped will not be forced out along the shaft and enter the motor through the lower bearing housing Motors driving pumps in pressure sys tems where the pressure is maintained after shutdown should be protected from over speeding by check valves or non reverse couplings Installation of the machine where hazardous flammable or combustible vapors or dusis present a possibility of explo sion or fire should be accor War nin 9 dance with the National Electri cal Code Articles 500 503 and consistent with sound local practices Extreme care is required for machines supplied with an explosion proof or
10. make it suitable for use outdoors in severe climates Filters can be supplied for the air inlet openings When used they should be cleaned periodically since clogged filters restrict the amount of cooling air and cause the motor to over heat Gages are sometimes used to meas ure the pressure drop across the filter and thus indicate its condition Filters should be cleaned when the gage reads over 0 4 of water RECEIVING HANDLING AND STORAGE Each motor should be carefully examined when received and a claim filed with the carrier for any damage The nearest office of the General Electric Company may of fer guidance The motor should be lifted by the lugs provided These lugs are intended for lifting the mo tor only and must not be used to lift any additional weight Be Wa rnin 9 careful not to touch overhead equipment Failure to observe this warning may result in personal injury or death If the motor is not to be installed immedi ately it should be stored in a clean dry location Precautions should be taken to prevent the entrance of moisture dust or dirt during storage and installation Pre cautions are taken by the factory to guard against corrosion The machined parts are slushed to prevent rust during shipment Examine the parts carefully for rust and moisture if the equipment is to be stored and re slush where necessary Motors are shipped without oil in the bearing reservoirs An oi
11. maximum water flow in gallons per minute Ex ceeding this maximum flow could cause deterioration of the cooling coil 11 GEK 95352 Whenever the motor is running enough water should be circulated through the coil to keep the steady oil bath temperature below 150 F 65 C The maximum pressure and maxi mum temperature allowable for cooling water are also shown on the nameplate or instructions Exceed ing these values may damage the coil or give insufficient cooling of the lubricating oil Use only pure clean water unless the motor was specifically ordered to have a coil and fittings of special material to withstand corrosive water Standard cooling coils are made from type K copper tubing with wall thick ness of 0 050 When the motor is shut down during freezing weather blow any remain ing water out of the coil 2 Oil Cooling Coil Connection As indicated above a cooling coil is used to keep oil in the bearing res ervoir cool Water at pressures as high as 100 PSI is circulated through the coil It is imperative there for that all joints be tight and that there be no leaks A pin hole leak will quickly allow enough wa ter to overflow into interior of motor and cause motor failure Motors covered by this instruction book are furnished with inlet and outlet connection fittings designed to prevent inadvertent loosening of internal joints or undue stress on the internal piping when external water supply
12. pipes are connected to the motor See Figure 4 and the following paragraphs for further instructions Also see maintenance instructions To make water connections simply remove the pipe plugs furnished for shipping from brass fittings B and make connection to female pipe tapped hole in accordance with ap plicable codes and good practice TIGHTEN CONNECTIONS SE SECURELY BUT NOT EXCES SIVELY It is recommended that the upper fitting be used for inlet and lower fitting for drain DO NOT LOOSEN SCREWS F OR REMOVE PART B WHEN CONNECTING WATER SUPPLY TO MOTOR PART B MUST BE FULLY SEATED AGAINST PART A TO COMPRESS THE WATER OIL SEALING O RING Part A is screwed into the endshield wall and locked with set screws E when making water connection check part A to be sure it is tight and there are no oil leaks around it Since there is no solid connection between parts A and C inadvertent loosening of internal connections is minimized Pi COOLING COIL CONNECTION FITTINGS Figure 4 12 GEK 95352 IV OPERATION Before energizing the motor for the first time or after an ex tended shutdown it is advis able to check insulation resis tance power supply and me chanical freedom of the motor Caution If the motor has been stored in a damp loca tion dry it out thoroughly before operating Be sure that the motor is not running and the power supply is disconnected before working o
13. possible leave motor un coupled or uncouple it for initial operation so that motor vibration noise current and bearings can be checked uncoupled before they are masked by the pump To run a VHS motor uncoupled it is recommended that the pump head shaft be re moved If this cannot be done re move the upper half coupling and be sure the pump shaft is well cen tered in the motor shaft so it will not rub IF THIS IS DONE ROTATE MOTOR BY HAND TO BE SURE THERE IS NO INTERFERENCE BETWEEN SHAFTS Do not try to run motor uncoupled by just re moving gib key 8 When the driven machine is likely to be damaged by the wrong direction of rotation it is imperative to uncouple the motor from its load during the initial start and make cer tain that it rotates in the correct di rection If it is necessary to change rotation interchange any two line leads For multispeed motors check each speed independently On VHS motors do this before installing pump head shaft and upper half coupling Some motors are designed for unidi rectional rotation Rotation of these motors must be in accordance with the rotation indicated on the name plate and the outline furnished with the equipment Initial Start 1 After inspecting the machine carefully as outlined above make the initial start by following the regular sequence of starting opera tions in the control instructions 2 Run the motor uncoupled ini tially if possible checkin
14. the bottom of the motor See Figure 2 Solid shaft high thrust motors are not suitable for driving loads that impose significant radial load on the motor shaft they should not for example be used for belt drive applica tions Motors may be supplied with different bearing arrangements for various external thrust conditions imposed by the pump such as different magnitudes of down thrust and either momentary or continu ous up thrust A typical high thrust motor with angular contact ball bearings is shown in Figure l This standard con struction is for high continuous down thrust and is suitable for momentary up thrust equal to 3096 of the rated down thrust capacity of a high thrust motor NOTE THAT ANGULAR CONTACT BEARINGS CAN ONLY CARRY THRUST IN ONE DIRECTION Figure 3 shows a typical solid shaft high thrust construction on right side for ap plications requiring continuous up and down thrust capability In this type of motor two or three angular contact ball bearings are mounted in opposed mount ing with one bearing oriented to carry up GEK 95352 thrust and one or two oriented to carry down thrust If greater down thrust ca pacity is required motors may use one or two standard angular contact ball bear ings and one split race bearing which gives the capacity of two or three bear ings down and one bearing up This does however give more end play than nor mal IN LINE motors designed to be mounted on
15. windings and all accessory devices associated with the work area are disconnected from electrical power sources If a high potential insulation test is required procedures and precautions outlined in NEMA Standards MG 1 and MG 2 should be followed Failure to properly ground the frame of the ma chine can cause serious injury to personnel Grounding should be in accordance with the National Electrical Code and consistent with sound local practice These instructions do not purport to cover all of the details or variations in equipment nor to provide for every possible contingency to be met in connection with installation operation or maintenance Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser s purposes the matter should be re ferred to the General Electric Company 1988 1999 General Electric Company INTRODUCTION General Electric high thrust vertical mo tors covered by these instructions are carefully constructed of high quality ma terials and are designed to give long and trouble free service when properly in stalled and maintained These motors are generally used to drive pumps Both HOLLOW SHAFT and SOLID SHAFT motors are described in this in struction book Figure 1 shows a typical hollow shaft high thrust motor The solid shaft construction is similar except that the top half coupling is omitted and the motor shaft extends out
16. 352 MOTOR SHAFT NUT LOCKWASHER TOP CAP x ENDSHIELD COVER COUPLING KEY EUM LOWER HALF 2 Vi wits 7 0 COUPLING A N SSH THRUST BEARING A 2 CLAMP RING OIL RETURN 22 2 SLOT Lez 2 THRUST BEARINGS i Ys 1 997 ANGULAR CONTACT DN ZA gt SIGHT GAUGE RY AIR VENT OIL FILLER Y I2 PLUG DRAIN 4 AU PLUG 747 A7 SQUE S UPPER A f Aie ENDSHIELD A 4 LIFTING LUG d hi AIR INLET OIL METERING SCREEN OLE j N AIR EXHAUST 2 ff SCREEN 7 AIR DEFLECTOR BEARING NUT EON AND LOCKWASHER e STATOR COILS OIL SLEEVE XG ROTOR FAN FINNED FRAME A ROTOR ENDRING ROTOR KEY STATOR ROTOR LAMINATIONS LAMINATIONS AIR GAP FIGURE 3 TYPICAL UPPER BEARING CONSTRUCTION FOR SOLID SHAFT WEATHER PROTECTED MOTOR HIGH UP AND DOWN THRUST CONSTRUCTION IS SHOWN ON THE RIGHT AND IN LINE CONSTRUCTION IS SHOWN ON THE LEFT ENCLOSURE IS TYPICAL OF 444 449 FRAMES SEE FIGURE 1 FOR 509 5011 FRAME ENCLOSURE 26 GEK 95352 To GE Industrial Systems Attn Industrial Engineering Technical Publications Editor Reader Comments 2000 Taylor Street FortWayne IN 46801 2205 General Electric Company Bae 22200 GE Internal DC 8 380 3881 We welcome comments and suggestions to make this publication more useful Your Name Today s Date
17. GE dede 15 RelubtiCationzszi aee nnne anie na ete teet 16 Oil Viscosity Table ID eee ete tertie ires perte A ete ec ioe 17 edet ed tee OR ete Go as 17 Genefal 222 SR Sun RE PIPERIS 17 Ball Thr st Bearings esee D ets 17 spherical Roller Thrust Bearings ope Eoo Eo 18 Bearing Replacement mm mmm rr rrr rtt 19 Oil Cooling Coil Mamtenance EEUU E DEL AA LEE 19 Insulation and ee ettet ettet tete bu tte e el e e LER Le FOL EU Le EUER Ee LLL be ele ba bet E 20 General scito teu 20 Vacuum and Compressed Air Cleaning eese nennen enne 21 Cleaning with Water and Detergent eate ea ep n beoe e 21 Cleaning with Solvents 2 ertet DR eerte ieee dae DEL epee gren y ded ga 21 Revarmishing Wandings tele elcid fiut bel te e t tens 22 Renewal nda efe o fee ue e 22 Troubl e Shootin amp o aee eee te Ort tu EY PEERS Te ERR E URO ERR 23 GEK 95352 Safety Precautions High voltage and rotating parts can cause serious or fatal in jury Installation operat
18. GEK 95352 GE Industrial Systems Instructions Vertical Induction Motors High Thrust Hollow and Solid Shaft In Line Solid Shaft Frames 444 5011 NEMA Type P Base Weather Protected Type I and Type II GEK 95352 CONTENTS Subject Page Salety Precautions 2 tte ette ele e tete e dete letedeeletetbtetetebhtaletsthtatets tete 3 iet tor Peery piter roit coni Cocina clc nine 4 Cross Sectional Drawings uii iy bes ee ego eter eese ve 24 25 26 Receiving Handling and Stor ge ie e aee eer E aoia 5 MMP AC KANG NEL NE NE NR NER SEDE heir i 5 Install tion RAT EEE EOE EEE OE ERES 6 Location and MOURBUDP AE ee IN Lm dan Nets 6 P imp and System Precautions ciet ete t edet a e n Eee bue Le ear e ECL o Delete be ele tete obe te e etae b ee 6 Alignment of Solid Shaft Motors e nentes enhn 7 Couplings for Hollow Shaft Motors essccccessseccceessececeessaceccesseeeceessaeeceessaeeesessaeeecessaeeseesaeeseesaeees 7 General us eenenuRmERERRERREFREWREHERRRIREREERRRRNREHHRERRRPRHERHERIH REPE 7 Self Release Co plings ette pDUI eee 7 Bolted Couplings 5 o n e e e e d bed dle ied leere
19. If needed how we contact you Your Company s Name and Address Job Site Fax No GE Requisition No Phone No Your Job Function How You Use This Publication Publication No E Mail Publication Issue Revision Address Date General Rating Excellent Good Fair Poor Additional Comments Contents Organization Technical Accuracy Q Clarity O O O O Completeness O O O O Drawings Figures O O O Tables Referencing Readability O O Specific Suggestions Corrections information that could be expanded on and such Page No Comments Other Comments What you like what could be added how to improve and such Overall Grade Compared to publications from other manufacturers of similar products how do you rate this publication Superior Comparable O Inferior Do not know Comment Detach and fax or mail to the address noted above 27 GEK 95352 X EU Fold here and close with staple or tape sss eee Place Stamp Here GE INDUSTRIAL SYSTEMS INDUSTRIAL ENGINEERING TECHNICAL PUBLICATIONS EDITOR 2000 TAYLOR STREET FORT WAYNE IN 46801 2205 USA Fold Here ios te ote er D Ue UN RR ERES 28 GEK 95352 Document Revision History Rev Date Author ISAAC Description 0 12 03 99 GJG N A Conversion from PageMaker 29
20. N LEFT SIDE AND NON REVERSE COUPLING IS SHOWN ON RIGHT SIDE 24 TOP CAP TOP HALF COUPLING MOTOR SHAFT AND NUT LOCKWASHER LOWER HALF COUPLING OIL FILLER PLUG LIFTING LUG OIL LEVEL SIGHT GAUGE VENT HOLE OIL SLEEVE OIL DRAIN PLUG OIL METERING HOLE AIR VENT FRAME AIR EXHAUST LOUVERS CONDUIT BOX AIR VENT O RING SEAL Olt FILLER PLUG Olt LEVEL SIGHT GAUGF OIL DRAIN PLUG OIL METERING HOLE OIL SLEEVE s R EN DAPA ff NY 5 555555 722 SAN CARRS i m NS H ne 7 i 12 FIGURE 2 TYPICAL SOLID SHAFT HIGH THRUST MOTOR WITH SPHERICAL ROLLER UPPER THRUST BEARING WEATHER PROTECTED Il ENCLOSURE SHOWN IS AVAILABLE FRAMES 509 5011 BUT NOT AVAILABLE IN 444 449 FRAMES 25 GEK 95352 PIN RETAINING PLATE SPRING 7 PIN CARRIER RATCHET PIN RATCHET ENDSHIELD COVER PLATE LOWER HALF COUPLING KEY OIL BAFFLE AIR INLET SCREEN AIR INTAKE CHAMBER UPP THRUST BEARING UPPER AIR DEFLECTOR STATOR COILS ROTOR FAN AND ENDRING ROTOR KEY ROTOR LAMINATIONS STATOR LAMINATIONS AIR DUCTS AIR GAP LOWER AIR DEFLECTOR LOWER BEARING COVER AIR INLET SCREEN LOWER GUIDE BEARING AIR INTAKE CHAMBER BEARING NUT AND LOCKWASHER BASE ENDHSIELD CUSTOMER MOUNTING HOLE CUSTOMER MOUNTING FIT GEK 95
21. Tightness B General Cleanliness The interior and exterior of the machine should be kept free from dirt oil grease and conducting dust Oily vapor debris or dust may build up and block off venti lation Any of these contaminants can lead to early motor failure Motors should be disassembled and thoroughly cleaned periodically as needed 15 GEK 95352 Motors may be blown out with dry com pressed air of moderate pressure How ever cleaning by suction is preferred be cause of the possibility of water in the compressed air lines and the danger of blowing metal chips into the insulation with compressed air To prevent injury to eyes and respiratory organs safety glasses and suitable ventilation or other protective equipment should be used Operator must Warnin 9 not use compressed air to re move dirt or dust from his person or clothing Screens and covers are provided as neces sary for protection of the equipment and personnel All screens must be kept free of dirt and debris to ensure proper venti lation and kept in place for protection of personnel C Coupling Maintenance The condition of non reverse couplings should be checked periodically by re moving the top cap If dirt has caused the action of the pins to become sluggish the pin carrier should be removed disassem bled and thoroughly cleaned with a suit able solvent The parts should then be dried and reassembled in accordance
22. a thermometer If there is any doubt about the safe op erating temperature take the tem perature of the part in question and confer with the nearest sales office of the General Electric company Give full details including all nameplate information Overheating of the motor may be caused by improper ventilation ex cessive ambient temperature dirty conditions excessive current due to overload unbalanced a c voltage or if a variable speed controller is used harmonics in power supplied to the motor V MAINTENANCE Before initiating maintenance procedures disconnect all power sources to the motor and accessories For machines equipped with surge capacitors Warnin g do not handle capacitor until it is discharged by a conductor simultaneously touching all terminals and leads including ground This discharge conductor should be insulated for handling Replace all normal grounding connections prior to operating Failure to observe these precautions may result in injury to personnel A General Inspect the motor at regular intervals as determined by service conditions Keep the motor clean and the ventilation open ings clear In addition to a daily observation of the overall condition it is recommended that a regular inspection routine be set up to check periodically the following items 1 General Cleanliness 2 Insulation and Windings 3 Lubrication and Bearings 4 Coupling Bolt
23. an allowing automatic re start as soon as power is applied to the starter or incorporates a back spin timer to keep power from being automatically reapplied to the motor until enough time has elapsed for water back flow through the pump to stop and for the motor to com pletely stop Power supply phase sequence rever sal will also cause the motor to re verse and unscrew the pump shaft but this rarely occurs An anti phase reversal relay can be incorpo rated in the motor controller if de sired To prevent uncoupling on initial start up check motor rotation direc tion before installing the upper half coupling to be sure direction is cor rect To reverse direction of rota tion interchange any two power leads 2 Bolted Couplings Bolted couplings allow up thrust from the pump to be taken by the motor bearings This type of cou pling is similar to a self release coupling except that the driving pins are replaced by bolts which should be securely tightened to hold the two halves of the coupling solidly together so that torque is transmitted by face friction See torque re quirements This type of coupling does not have the self release fea ture and allows reverse rotation See the self release coupling shown to the left of the motor centerline in Figure 1 which is applicable to bolted couplings except that the headless drive pins are replaced by bolts as explained above 4 Couplings
24. ant for a one half hour period b Enclose the motor with canvas or similar covering leaving a hole at the top for moisture to escape Insert heating units or lamps and leave them on until the insulation resistance is constant for one half hour period Be careful not to get heating units so close to the winding that they cause localized damage c With the rotor locked and using ap proximately 10 of rated voltage pass a current through the stator windings In crease the current gradually until the tem perature reaches 90 C Do not exceed this temperature Maintain a temperature of 90 C until the insulation resistance be comes constant for a one half hour pe riod 2 Check bearing oil reservoirs to be sure they have been filled to the proper level with fresh oil See RELUBRICATION TABLE II 13 GEK 95352 and LUBE NAMEPLATE on motor for oil grade and viscosity and fur ther instructions Be sure filler caps and drain plugs are securely tight ened 3 Whenever possible examine the interior of the machine for loose objects or debris which may have accumulated and remove any for eign material 4 If possible turn the rotor by hand to be sure that it rotates freely 5 Check all connections with the connection diagram Check all ac cessible factory made connections for tightness to make sure none has become loose during shipment 6 Check water cooling connec tions flow and temperature 7 If
25. ar contact bearings which have failed and are especially tight on the coupling can sometimes be removed by using the following procedure separate the bearing by forcing the outer race over the balls then with a torch apply quick heat to the inner race while also applying pulling pressure Angular contact bearings which are to be stacked together should have their high points of eccentricity indicated by a bur nished spot on the inner race lined up All bearings should be of same manufac ture and of the type that permits stacking 19 GEK 95352 Some motors with angular contact ball bearings are supplied with removable spacer ring under the outer race of the thrust bearing so that the thrust capacity can be increased by adding an extra bearing or bearings When these bearings are installed the high points of eccentric ity should be lined up with the keyway in the lower half coupling If the original bearings have been in service they should be replaced at the time this conversion is made G Cooling Coil Maintenance See general description of cooling coil connection fitting and Figure 4 As part of ongoing preventative mainte nance check for oil leaks around the cooling coil fitting and check for possible internal water leakage as indicated by an unexplained rise in oil level or a change in oil color Parts A B E and F should always be tight and part B should always be seated tightly against part A to ensu
26. cleaning and reconditioning the bearing housing may be washed out with a suitable cleaning solvent 1 1 1 Trichlo roethane may be used following the same instructions and cautions as shown for cleaning windings Avoid using any sol vent that will soften the paint used on the interior of the oil reservoir Be sure that the oil metering hole is clear and then dry the housing thoroughly before reassem bly E End Play Adjustment 1 General Most high thrust motors are de signed to withstand only momentary up thrust This up thrust which can exist for a few seconds during starting is taken by the lower guide bearing To prevent the thrust bear ing from losing radial stability dur ing this time the motor end play is limited to a small amount by ad justment of the motor shaft nut This 17 adjustment is made at the factory and need not be disturbed on a new motor However should the motor be disassembled for any reason the adjustment must be made during re assembly to avoid damaging the bearings or having some rotating part rub against a stationary part The procedure depends upon the type of thrust bearing 2 End Play Adjustment Ball Thrust Bearing For a motor with angular contact ball thrust bearings refer to Figure 1 When the motor shaft nut is tight ened the rotor shaft and lower bearing are drawn up until the outer ring of the lower bearing seats against the lower bearing cover Further tighten
27. coil when tight ening C Next tighten C by using wrench on hex fitting at inner end of C 6 Next slide part A into place and screw tightly into end shield being careful not to damage outer surface of C where O Ring will seat 7 Check gap between endshield wall and inner surface of A If this exceeds 1 4 endshield hole should be tapped deeper 8 Check position of end of C with respect to outer face of A See Figure 4 for limiting dimensions 20 GEK 95352 9 Install 3 set screws E in A 120 apart and tighten securely to lock A into position and keep it from unscrewing Set screws should bite into surface of endshield 10 Be very careful not to damage or mar outer surface of C where O Ring seats 11 Re check outer end and slot of C and remove any burrs or sharp edges to prevent damage to O Ring during assembly Then lubricate O Ring and slide it into position shown in Figure 4 Be sure to push it in until it seats against A 12 Slide part B into place and se cure with 3 socket head screws F Tighten F screws until flange of B seats solidly against A There should never be a gap between A and B Use Loc Tite on threads of F screws to prevent their unscrew ing Parts A and B compress the O Ring against C and seal oil into motor and wa ter into coil 13 Pressure check entire system H Insulation and Winding Maintenance 1 General For long life and satisfactory opera tion insulated w
28. e time from shutdown the instant the stop button is pressed to zero speed is greater than two seconds operation will be satisfactory To permit operation when stopping time is less than two seconds the pins are spring loaded For those cases involving cycling frequent starting and stopping and stopping times greater than two seconds the springs may be removed to decrease wear on the ratchet plate Pins and springs are made of heat treated stainless steel A complete non reverse coupling consists of a self release coupling plus a non reverse assembly which includes pin carrier pins springs pin retaining plate and cap screws On motors covered by this instruc tion book the ratchet teeth are an integral part of the endshield cover casting A self release or a bolted coupling can be converted to a non reverse coupling without disturbing the ad justment of the pump shaft nut The non reverse aAssembly will nor mally be received as a unit To as semble it onto the motor loosen the 3 small capscrews that hold the pin retaining plate so this plate can be centered during assembly Next re move the drive pins or bolts from the lower half coupling Then slide the non reverse assembly down over the top half coupling Next insert the long cap screws through the plate pin carrier and top coupling and into the lower coupling Tighten them securely so that torque will be trans mitted by friction between the cou p
29. g Check the end play by placing a dial indicator between the end shield cover and the lower half coupling and pressing down on the latter with a jack sec Figure 2 until the bearing seats in its housing Repeat this process of tightening the nut and checking the end play until 0 015 to 0 020 end play is ob tained then lock the nut with the setscrew There are six holes in the nut and five holes in the lower half coupling making a total of 30 locking positions where two holes line up Turning the nut from one locking position to the next repre sents a change of end play of ap proximately 0 0028 When run uncoupled from the pump the motor may have exces sive vibration If so it should be checked with zero end play The thrust bearing will then be more nearly in the position it will assume when down thrust is applied during normal operation After the check run set the end play as described previously Do not run motors with spherical roller thrust bearings un coupled for long periods because the lower bearing may over heat or fail because of the up thrust load im posed by the springs F Bearing Replacement In general replacement bearings should be of the same type and installed in the same relative position as the original bearings When removing bearings apply steady even pressure parallel to the shaft or lower half coupling center line Apply this pressure to the inner race whenever possible Angul
30. g for ab normal noise vibration or bearing temperatures and for current and voltage balance Then check motor operation under load for an initial period of at least one hour to ob serve whether any unusual noise or hotspots develop 3 In the event of excessive vi bration or unusual noise remove all power and disconnect the machine from the load and check the mounting and alignment 4 Space heaters should be de energized during motor operation 5 Check line voltage on all 3 phases to be sure it is balanced and 14 GEK 95352 within 10 of motor rated voltage with motor drawing load current 6 Check the operating current against the nameplate value Do not exceed the value of nameplate am peres X service factor if any under steady continuous load Also check to be sure that current in all three lines is balanced C Jogging and Repeated Starts Repeated starts and or jogs of induction motors greatly reduce the life of the winding insula tion The heat produced by each acceleration or jog is Warnin g much more than that dissipated by the motor at full load If it is necessary to re peatedly start or jog a motor it is advisable to check the application with the local General Electric sales office Check motor heating but do not de pend on your hand to determine temperature Use the temperature detectors furnished in the motor if there are any eg RTD s or thermo couples or use
31. inding should be kept clean and free of dirt oil metal particles and other contaminants A variety of satisfactory and accept able methods are available for keeping equipment clean The choice of method will depend greatly on time availability of equipment and on the insulation system However vacuum and or compressed air cleaning with non metallic hose tips should precede cleaning with water and detergent or with solvents Tightly adhering dirt may require gentle brushing or wiping to get it loose To prevent injury to eyes and respiratory organs safety glasses and suitable ventilation or other protective equipment Warn ing should be used 2 Vacuum And Compressed Air Cleaning Compressed air may be used to re move loose dirt and dust from air passages such as air ducts Suction should be used to remove dirt and dust particles from winding to avoid driving particles into the winding and damaging the coils Care must be taken to make sure that the air supply is dry and that excessive air pressure is not used Generally a pres sure of not more than 30 psi is Caution recommended Operator must not use com pressed air to remove dirt or dust from his person or cloth ing Warning 3 Cleaning With Water and Detergent This method is very effective in cleaning windings when used with a low pressure steam jenny maxi mum steam flow 30 PSI and 90 C 21 GEK 95352
32. ing of the nut pre loads the bearings Note that shoul der on the shaft below the lower half coupling is purposely located so that it does not seat against the coupling The best way to adjust the nut is by trial using an indicator between the lower half coupling and top end shield and lifting the rotor to check the end play after each setting of the nut until between 0 002 and 0 005 is obtained The nut should then be locked with its lockwasher If equipment is not available to use this method the following proce dure may be used Tighten the mo tor shaft nut carefully until all end play is removed and the rotor just fails to turn freely Then back the nut off 1 6 turn and lock with its washer An assembly nameplate giving this information is mounted on the motor Motors which must withstand con tinuous up thrust have a somewhat different construction The upper thrust bearing is arranged to take this up thrust it consists of angular contact thrust bearing mounted back to back DB See Figure 3 The inner rings are locked on the lower half coupling with a nut and the outer rings are clamped in the endshield with a ring The shaft shoulder below the lower half coupling is so located that it seats against the lower half coupling be fore the lower bearing comes up against its cover No special adjust ment is necessary when reassem bling this type of motor and the motor shaft nut can be pulled down tigh
33. ion and maintenance of electric machinery should be per War NING formed by qualified personnel Familiarization with NEMA Publication MG 2 Safety Standard for Construc tion and Guide for Selection Installation and Use of Electric Motors and Generators the Na tional Electrical Code and sound local practices is recommended For equipment covered by this instruction book it is important to observe safety precautions to protect personnel from possible injury Among the many considerations personnel should be instructed to Avoid contact with energized circuits or ro tating parts Avoid by passing or rendering inoperative any safeguards or protective devices Avoid use of automatic reset thermal pro tection where unexpected starting of equipment might be hazardous to person nel Avoid contact with capacitors until safe dis charge procedures have been followed Be sure that the shaft key is fully captive before the motor is energized Avoid extended exposure in close proximity to machinery with high noise levels Use proper care and procedures in han dling lifting installing operating and main taining the equipment Do not lift anything but the motor with the motor lifting means Safe maintenance practices with qualified per sonnel are imperative Before starting mainte nance procedures be positive that e Equipment connected to the shaft will not cause mechanical rotation Main machine
34. king the check the motor outline print shows a maximum dimension XH from the top of the coupling to the top of the pump shaft Ad hering to this design limit will allow the shaft and coupling to lift enough to clear the pins and still leave a small clearance between the shaft and cap For standard motors XH is as shown in Table 1 GEK 95352 Table 1 Frame Size XH 444 449 4 38 509 5011 4 88 Depending upon the circumstances causing reversal and upon which line shaft joint unscrews there may be enough energy stored in the ro tating parts at the time the coupling clears the pins to cause the pump shaft to continue to rise and strike the top cap However if the above conditions are met damage even in the most severe cases should be limited to a broken cap It is intended that self release cou plings will be called upon to un couple only infrequently NOTE ANY TIME A SELF RELEASE COUPLING UN COUPLES IT IS NECESSARY TO REMOVE ALL POWER AND MANUALLY RE COUPLE Uncoupling is most frequently caused by application of single phase power after a power supply disturbance while the motor is be ing driven in the reverse direction by the pump this single phase power causes the motor to take over and drive the pump in the reverse direction and the pump shaft joints will then unscrew To prevent this select a motor starter which requires a manual start after any stop rather th
35. l film remains on GEK 95352 the bearings but if the storage period is to exceed three months the reservoirs should be filled It is suggested that such oil filled motors be conspicuously tagged in order to prevent mishandling which would cause oil spillage and subsequent damage to the internal parts of the motor When filling for storage fill to the maxi mum level shown on the gage or ap proximately gt over the mark showing the standstill level Before operating the motor drain this oil and refill with fresh oil See instructions under RELUBRI CATION for oil recommendations During storage windings should be pro tected from excessive moisture absorption by some safe and reliable method of heating Space heaters if supplied may be used for this purpose The temperature of the windings should always be main tained a few degrees above the tempera ture of the surrounding air It is recom mended that motors in storage be in spected the windings meggered and a log of pertinent data kept Any significant decrease in insulation resistance should be investigated If a motor is to be in storage for over one year it is recommended that competent technical inspection service be obtained to ensure that the storage has been ade quate and that the motor is suitable for service Contact your nearest General Electric Sales office to arrange for in spection service A Unpacking If the machine or machine parts have
36. ling faces rather than through the bolts See TORQUE REQUIRE MENTS Finally tighten the 3 small capscrews to secure the pin retaining plate The top half of the coupling should seat solidly on the lower half and the pins should touch the bottom of the pockets between the teeth in the ratchet The clearance between the pin carrier and the top of the ratchet teeth should be between 1 16 and 1 8 10 GEK 95352 When installing a non reverse coupling do not use lubricant Lu brication will lower the coefficient of friction between pins and pin carrier and the pins may not stay up when motor reaches full speed Motors shipped from stock may have their top couplings and non reverse assemblies packaged sepa rately They can be installed as de scribed in previous paragraphs E Power Supply Connections 1 Wiring and Grounding Motor and control wiring over load protection and grounding should be in accordance with the National Electrical Code and consistent with sound local Warnin g practices Failure to observe these precautions may result in damage to the equipment injury to personnel or both Stator winding connections should be made as shown on the connection diagram or in accordance with the wiring diagram attached to the in side of the conduit box cover For 3 lead motors no connection diagram is needed or supplied The motor frame may be grounded by attaching a ground strap from a
37. n motor d Warning A Steps Prior to Initial Start Up or After a Long Idle Period 1 Check insulation resistance as indicated in the caution above Before measuring insulation resistance the machine must be at standstill and all windings to be tested must be electrically connected to the frame and to Warnin g ground for a time sufficient to remove all residual electrostatic charge Failure to observe these precautions may result in in jury to personnel In accordance with established stan dards the recommended minimum insulation resistance for the stator winding is as follows VS Rs 1 1000 Where RS is the recommended minimum insulation resistance in megohms at 40 C of the entire sta tor winding obtained by applying di rect potential to the entire winding for one minute and VS is rated ma chine voltage NOTE SEE IEEE RECOMMENDED PRACTICE FOR TESTING INSU LATION RESISTANCE OF ROTATING MACHINES PUBLICATION NO 43 FOR MORE COMPLETE MATION If the insulation resistance is lower than this value it may be wet and it is advisable to eliminate the mois ture in one of the following ways a Dry the stator in an air circulating oven with the air surrounding the part at 95 C to 115 C until the stator has been above 90 C for at least four hours Then the air temperature may be raised to 135 C to 1 15 C Continue to heat until the insulation resistance is const
38. pumps which are directly in the pipe line and hence called IN LINE motors are also covered by this instruction book These motors have two opposed mounted angular contact ball thrust bearings at the top end of the motor so they can carry either up or down thrust The lower guide bearing is a radial ball type and also car ries any radial load imposed by the pump IN LINE motors are always of the solid shaft type This construction is shown on the left side of Figure 3 Spherical roller bearings are sometimes used for applications requiring extra high down thrust capacity and or extra bearing life these bearings may require water cooling See Figure 2 Motors with spherical roller thrust bearings also re quire certain minimum down thrust dur ing all continuous operation Since overloading greatly reduces bearing life the amount of thrust applied should not exceed the recommended values This instruction book applies to motors with either Weather Protected I or Weather Protected II enclosures as de fined by NEMA Both of these are motors WP II enclosure is not available in 440 frame series Weather Protected I motor construction is shown in Figure 1 for 500 frame motors and in Figure 3 for 440 frame motors Weather Protected II motor construction is shown in Figure 2 This enclosure is characterized by additional protection at the air inlet and outlet passages and by gaskets drains and other features to
39. re that the sealing O Ring is properly com pressed If cooling coil is to be removed first re move supply pipes and drain water out of coil Next remove parts F B E and A in that order Then remove the endshield cover and unscrew the inlet and outlet pipes part C from the cooling coil being careful to hold the elbows on the ends of the cooling coil to prevent damage Fi nally remove the oil baffle and the cool ing coil To re install the cooling coil proceed as follows 1 OBTAIN A NEW O RING UNLESS YOU ARE CERTAIN OLD O RING IS UN DAMAGED AND HAS NOT AGED OR TAKEN A COMPRESSION SET 2 Place coil without inlet out let pipes C in endshield and secure loosely 3 Stick inlet outlet pipes C through holes in end shield wall and check line up of pipes and end shield holes by screwing pipes loosely into cooling coil elbow Pipes should be centered in holes in end shield wall Adjust cooling coil as needed but Do Not Tighten Parts Yet 4 Thread part A over pipes and screw A into end shield loosely Adjust position of cooling coil as necessary to let pipes exit without strain and then secure cooling coil into end shield 5 Remove parts A and C and put pipe joint compound on threads In spect outer end and slots in C pipes and remove any burrs or sharp edges to prevent damage to O Ring during assembly Then screw pipes C hand tight into cooling coil el bows being careful not to bend or damage the cooling
40. re summarized in Ta ble 11 Oil Viscosity Operation in ambi ent temperatures that are near or below freezing may require preheating the oil or the use of a special oil In some cases water cooling for the oil is impractical or undesirable and the normal operating oil temperature will be in range of 170 F to 210 F Also in some cases the bearing size thrust load and speed are so high that even with water cooling the normal oil temperature may be as high as 210 F In these cases it is especially im portant that proper viscosity high grade oil containing an oxidation inhibitor be used Observe the condition of the oil fre quently and change oil when it begins to show signs of deterioration TABLE Il OIL VISCOSITY GEK 95352 For a particular motor refer to the lubrication nameplate or instructions Bearing Function Oil Viscosity SUS and Location Bearing Type 100 F 210F GE Spec Thrust Bearing Angular Contact Ball 150 45 D6B6A In top endshield Spherical Roller 600 70 D6B14C1 or 300 53 D6B6B Guide Bearing Ball 150 45 D6B6A In base endshield Oil lubricated bearing housings are pro vided with large settling chambers in which dust dirt and sludge collect Un less the oil has been permitted to oxidize the draining of the old oil during regular changes will usually provide sufficient flushing action to clean out the reservoir Whenever the motor is disassembled for general
41. se operating with the oil level too high prevents the bearing from clearing itself of excess oil The resultant churning can cause extra loss high temperatures and oxidized oil If during operation the oil level goes above the maximum shown on the sight gage drain enough oil to bring the level back within the operating range A hole is provided inside the drain plug to make it possible to do this without completely removing the plug 16 GEK 95352 Do not permit the operating oil level to fall below the minimum shown on the gage Should it ever become necessary to add excessive amounts of make up oil investigate immediately for oil leaks Change oil at regular intervals The time between oil changes depends upon the se verity of operating conditions and hence must be determined by the motor user One or two changes a year is average but special conditions such as high ambient temperature may require more frequent changes Avoid operating motor with oxi dized oil Use only best grade oxidation and corro sion inhibited turbine oil produced by reputable oil companies The viscosity weight of the oil to be used depends upon the type and size of the bearing its load and speed the ambient temperature and the amount and temperature of the cooling water if used The lubrication nameplate or instruction with each motor specifies the viscosity range of oil suit able for average conditions The usual recommendations a
42. t and locked The end play of motors using DB mounted bearings will then be very small 0 005 or less 3 End Play Adjustment Roller Thrust Bearing Springs are used under spherical roller thrust bearing to keep them axially loaded during momentary up thrust periods See Figure 2 This puts an up thrust load on the lower guide bearing The springs and spacers if a full circle of spring is 18 GEK 95352 not used are located in a chair which is in turn located in the upper endshield This chair and the cap tive springs can be removed and cleaned as a unit if necessary it should not be taken apart unless it or a spring is damaged End play is provided in the motor so that the application of down thrust during normal operation will cause the thrust bearing to move down and seat in its housing and relieve the up thrust load on the lower bearing Thus to avoid premature failure of the lower bearing the minimum to tal external down thrust that is ap plied continuously to the motor during operation should always be greater than the spring load listed on the individual outline provided with the motor This value may range from 3000 pounds to 6000 pounds depending on the size of the bear ing Adjust the end play by adjusting the motor shaft nut Tighten the nut un til the lower bearing comes up against its cover and the springs are being compressed as indicated by downward movement of the lower half couplin
43. tricted ventilation Excessive ambient temperature Short circuited coil or windings Dirty windings Unbalanced voltage1 Harmonics power supply Variable Frequency Control Fan broken Bearings Overheating Calibration of measuring instrument Worn out or dirty oil Insufficient oil Misalignment Excessive thrust or radial loading Shaft currents Insufficient cooling water Improper end play Insufficient down thrust on SRB Fan broken Bearing Housing Oil Leaks Incorrect grade of oil type or viscosity Loose fittings Cracked porous casting Over filled Water in oil Motor Excessive Vibration Unbalance Misalignment Improper or settled foundation Non uniform air gap Rubbing parts Bent shaft Unbalanced stator current Damaged bearings Reed critical Incorrect end play Fan broken Motor Failure to Start Wrong transformer taps Wrong connections Open circuit Excessive line drop low voltage at motor Excessive load Rotor rubs Wrong direction of rotation Insulation Low Insulation resis tance insulation failure Moisture dirt metal particles oil or other contaminants on the insulated windings Wrong voltage Excessive temperature Voltage surges lightning Mechanical damage Excessive vibration with resultant mechanical damage Single phasing 23 GEK 95352 MOTOR SHAFT NUT AND LOCKING SCREW BEAM we ENDSHIELD HYDRAULIC JACK
44. ure to its vapor Failure to ob serve these precautions may result in injury to personnel Windings cleaned with solvent should be dried thoroughly by cir culation of dry air before voltage is applied One commercial source of 1 1 1 Trichloroethane is Chlorothene NU which is a Trade mark of the Dow Chemical Company Midland Michigan 5 Revarnishing Windings After several cleanings with water and detergent it may be necessary to revarnish the winding GE 9522 or equivalent varnish treatment is rec ommended for Class B and Class F systems This varnish is available from the General Electric Company insulating Materials Department or GE Service Shops 22 VI GEK 95352 All systems treated with varnish No 9522 or equivalent must be baked until the windings are at 150 C for four hours RENEWAL PARTS When ordering parts give description and state quantity of parts desired together with the nameplate rating model and se rial number of the motor For couplings also specify the type bore and keyway size Requests for additional copies of these instructions or inquiries for specific in formation should be addressed to the nearest sales office of the General Electric Company Vil TROUBLE SHOOTING CHART GEK 95352 Affected Parts Difficulty What to Check Windings Overheating Calibration of measuring instrument Excessive load Unbalance a c current Improper or res
45. with the instructions given under NON REVERSE COUPLINGS Sometimes after a long period of opera tion with frequent stops and starts the surface of the holes in the pin carrier be comes polished so that friction forces will no longer hold the pins clear of the ratchet teeth when the motor is running This condition can be remedied by rough ening these surfaces with a piece of em ery paper wrapped around a rod NOTE WHENEVER THE DISMAN TLING OF COUPLINGS IS NECES SARY THE USE OF WITNESS MARKS WILL ASSURE A BAL ANCED CONDITION WHEN RE ASSEMBLY IS COMPLETE Bolts on both bolted couplings and non reverse couplings should be checked pe riodically to be sure they are tight See recommended tightening torques A Relubrication Motors covered by these instructions have oil lubricated bearings Maintain proper lubrication by checking the oil level peri odically and adding oil when necessary Because of the clearing action of the bearing as the motor accelerates up to speed and the expansion of the oil as it comes up to operating temperature the oil level will be higher after the motor has been in operation for a while than it is with the motor at standstill The normal level with the motor stopped and the oil cold is marked STANDSTILL LEVEL on the sight gage Overfilling should be avoided not only because of the possibility that expansion may force the oil over the oil sleeve and into the motor but also becau
46. x 7 COVER PLATE PLATE Kee Li 3 RODS ced PAM VENE HOLE 1 EQ SPACED 7 Olt BAFFLE THRUST BEARING CABLE OR CHAIN P SPHERICAL ROLLER TOP CAP or et aes COOLING COILS LOWER HALF 2 COUPLING V INLET AND OUTLET FOR _ COOUNG WATER OIL FILLER PLUG M lt lt BEARING SUPPORT LIFTING PLUG NY Vul CHAIR OIL LEVEL SIGHT GAUGE 72 BEARING E LOADING SPRINGS UPPER ENDSHIELD OIL DRAIN PLUG eiie oe OIL METERING HOLE STATOR COILS OIL SLEEVE ROTOR ENDRING AIR VENT AIR DUCTS AIR EXHAUST LOUVE RI R STATOR LAMINATIONS CONDUIT BOX r 3 pua d ROTOR LAMINATIONS AIR EXHAUST CHAMBER Z AIR FILTER JE ACCESS COVER FRAME AIR FILTERS AIR VENT 2 WHEN USED VENT HOLE AIR INTAKE SCREEN OIL FILLER PLUG DR OIL LEVEL SIGHT GAUGE x SI OIL DRAIN PLUG T COVER NS R LOWER GUIDE aw BEARING NSSNN AS O RING AIR INTAKE METERING HOLE CHAMBER BEARING LOCK CIENT NUT AND WASHER BASE ENDSHIELD CUSTOMER OIL SLEEVE MOUNTING HOLE CUSTOMER MOUNTING FIT FIGURE 1 TYPICAL HOLLOW SHAFT HIGH THRUST WEATHER PROTECTED I MOTOR WITH ANGULAR CONTACT BALL UPPER THRUST BEARING SELF RELEASE COUPLING IS SHOWN O
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