GE GE752 manual

GEK–91584D VERTICAL DRILLING MOT OR TYPE GE752 CONTENTS Page INTRODUCTION 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GENERAL DESCRIPTION 2 . . . . . . . . . . . . . . . . . . . . DA T A 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPECIAL TOOLS AND EQUIPMENT 8 . . . . . . . . . . . GROUNDING INS[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 2 FIG. 1. GE752 VERTICAL DRILLING MOTOR. E–39088. INTRODUCTION GE752 drilling motors designed for vertical opera- tion, Fig. 1, are available in GE’s UP , AU P , US and AUT series. This instruction provides inspection, mainte- nance and basic overhaul procedures for all of these motors. See T[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 3 T ABLE 1. MODEL DIFFERENCES Motor Model Differences Superseded By 752UP1 This is a shunt motor with the following distinctions: – Has internal greasing tubes for both drive end (pinion end) and commutator–end bearings – Has a double–ended shaft. 752UP2 Same as UP1 except: – Has armore[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 4 T ABLE 1 (Cont’d) MODEL DIFFERENCES Motor Model Dif ferences Superseded By 752AUP3 Same as AUP2 except: – Has a single grease tube at drive end which is part of framehead/bearing assembly for ease of armature disassembly . 752AUP4 Same as AUP3 except: – Has improved insulation for higher [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 5 DA T A (Cont’d) Carbon Brushes T ype T900 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Size (in.) 3/4 x 2–1/4 x 2 . . . . . . . . . . . . . . . . . . . . . . . . . [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 6 DA T A (Cont’d) Pole Bore Diameter (measured at center of pole) (in.) Motors: Min. Max. Exciting Poles (Shunt models) 19.606 19.640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exciting Poles (Series models) 19.613 19.640 . . . . . . . . . . . . . . . . . . . [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 7 DA T A (Cont’d) Motor Ratings* Continuous Max. HP Shunt (UP) V olts 750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Armature Amps 1050 . . . . . . . . . . . . . . . . . [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 8 SPECIAL T OOLS AND EQUIPMENT CAUTION: This machine is of open splash–proof construction. It is force–ventilated and requires an ample supply of cooling air . The cooling air should not contain combustible gases. If it is applied in an environment which may contain combustible gases, an adeq[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 9 decks by bolting or welding should not require additional grounding. (References: ABS Rules for Building and Classing Steel V essels, Section 35.9.6, and IEEE Stan- dard 45–1977, Recommended Practice for Electrical In- stallations on Shipboard, Section 21.4.) GROUNDING PROCEDURES (Fig. 2) Mos[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 10 INSPECTION MONTHL Y Inspect the exterior of the machine, including cables, for damage. Covers, Seals, Latches Clean the outside of the machine and remove the in- spection covers. Use clean, dry compressed air and blow the dirt and carbon dust from the interior of the ma- chine. W ARNING: When [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 11 3. Continue tapping as described in Step 1 until the 0.753 dimension falls between 0.751 and 0.755. 4. If, due to excessive pounding, the inside dimen- sion becomes less than 0.751 in., file back to size with a fine mill file. Additional repairs can be made to restore damaged brushholder bodie[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 12 Brushes Brush wear is determined by measuring actual brush length from the top of the carbon. Lift the brush spring, remove the brush and measure brush length on the longest side. NOTE: If brush replacement is not required, be sure that brushes are of suf ficient length to last until the next [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 13 Insulation Measure the insulation resistance with a meg– ohm- meter (Megger) to determine the condition of the insula- tion. If reading is low , make a further inspection to deter- mine if insulation failure or excessive moisture is caus- in g the low megohmmeter reading. Correct the cause o[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 14 3. Remove bolt, washer and brushholder clamp. Lift the brushholder out of the frame. Installation 1. Position the brushholder in the frame with the brushholder studs resting in the clamp surfaces of the brushholder support. 2. Install bolt and washer . T ighten bolt but do not torque until the[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 15 FIG. 7. DIAGRAM OF CONNECTIONS TO RUN A SERIES MACHINE FROM A WELDING SET . E–28718. leads so machine will operate as a series motor , and the armature will rotate counterclockwise (viewed from the commutator end). Preparation For Operating Shunt Model Machines For Commutator Resurfacing 1. [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 16 CAUTION: Never use an emery cloth on this or any commutator . The abrasive particles on emery cloth scratch the commutator surface and lodge in the groves between commutator segments. The condition creates the possibil- ity of an eventual flashover which could seri- ously damage the machine. W[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 17 FIG. 1 1. COMMUT A TOR GRINDER. E–18249. NOTE: For most applications, finish–grade resurfacing stones are recommended. Medium grade stones can be used for rough grinding a deeply grooved or threaded commutator, or a commutator with deep flat spots, followed by fi- nish–grade stones for t[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 18 2. T urn the feed control to back the stones away from the commutator before starting the ma- chine. NOTE: If possible, use some method of collect- ing the copper chips and abrasive dust pro- duced by the grinding operation. For example, use a vacuum cleaning device with the suction wand set j[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 19 W ARNING: When using compressed air for cleaning purposes, flying debris and particles may present a hazard to personnel in the im- mediate area. Personnel should be provided with, and trained in the use of, personal pro- tective equipment as specified by applicable federal or state safety reg[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 20 T ABLE 2. DRA WING REFERENCE GE752 Model Inst. Book Longi– tudinal Puller T ools Comm. Pinion End End Arm. Shaft Connection Diagram Coiled Frame As- sembly Bearing Grease Distribution Drive Comm. End End Arm. Locking Arrange- ment Outline AUP1 Fig. 15 Fig. 16 Fig. 17 Fig. 20 Fig. 22 Fig. 29 [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 21 3 FIG. 13. COMMUT A TOR–END BEARING PILOT . E–18150. heavy paper around the commutator for protec- tion during handling. 4. Remove grease tubes from the commutator– end bearing cap: a. On UP1 and AUP1 models, there are two grease tubes (19, 20). b. On UP2 and AUP2 models, there is one gr[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 22 FIG. 15. LONGITUDINAL SECTION (41D732922 CHG. N). E–28621D. 56 57 52 42 43 44 45 46 VIEW OF COMMUT A TOR END FOR VIEW OF PINION END FOR ALL MODELS EXCEPT UP1, UP2, AUP1 AND AUP2 THIS GREASE TUBE CONFIGURA TION ALL OTHER MODELS ALL MODELS EXCEPT UP1, UP2, AUP1 AND AUP2 IS APPLICABLE T O MODEL[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 23 FIG. 15. LONGITUDINAL SECTION (41D732922 CHG. N). E–28621D. 55 54 53 47 51 50 49 48 MODELS SEE T ABLE 2, P AGE 20 VIEW OF COMMUT A TOR END FOR UP6 AND AUP5 NOTE: UP1 AND AUP1 MODELS HA VE 2 TUBE ASSEMBLIES, UP2 AND AUP2 HA VE ONE.[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 24 FIG. 15. LONGITUDINAL SECTION (41D732922 CHG. N). E–28621D. REF . DESCRIPTION 1 COILED FRAME 2 COILED FRAME 3 ARMA TURE AND BEARING ASSEMBL Y 4 OUTER BEARING CAP 5 OUTER BEARING CAP 6 CARBON BRUSH 7 COVER (TOP INSPECTION) 8 COVER (BOTTOM INSPECTION) 9 COVER (HAND HOLE) 10 BOL T (FRAMEHEAD), [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 25 FIG. 16. PULLER TOOLS (41D731569 CHG. 0). E–14383C. REF DESCRIPTION REF DESCRIPTION REF DESCRIPTION 4 CLAMP PLA TE 12 NUT , 5/8–1 1 21 STUD 5 BOL T 18 RING 22 STUD 6 PRESSURE CAP 20 STUD 23 NUT , 7/16–14 8. Reach into the drive–end of the motor and dis- connect grease tubes. a. On UP1 [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 26 REF DESCRIPTION REF DESCRIPTION REF DESCRIPTION 4 CLAMP PLA TE 17 CLAMP 21 STUD 5 BOL T 18 RING 22 STUD 6 PRESSURE CAP 19 CLAMP 23 NUT , 7/16–14 12 N UT , 5/8–1 1 2 0 STUD FIG. 17. PULLER TOOLS. E–18155A. framehead, jack the drive–end framehead loose, and lift the complete armature ass[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 27 16. Remove the framehead. It will come with the bearing outer race and bearing rollers. 17. Pull the inner bearing race off the drive end of the shaft with puller (Part 6751547G5). 18. Remove flinger (49) and inner bearing cap (51) with puller (Part 6751547G6) by inserting the four puller bolt[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 28 FIG. 18. LONGITUDINAL SECTION (41D735357, CHG. A). E–37949B VIEW OF COMMUT A TOR END 9[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 29 T ORQUE T ABLE P ART NO. SIZE LBS. FT . 1 .50–13 55–60 10,34 .625–1 1 1 10–120 17 .875–9 240–260 13,30 1.00–8 440–495 24 1.25–7 900–995 21 1.25–12 435–483 REF . DESCRIPTION 1 SHAFT 2 SLEEVE 3 BEARING HOUSING 4 BALL BEARING 5 SP ACER 6 SLEEVE 7 CAP 8 BEARING CAP (OUTER) [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 30 8. Screw a lifting bail, Fig. 14, on the drive end of the shaft. 9. Remove drive–end framehead bolts (3 0 ) and in- sert three jack screws in the threaded holes pro- vided in the framehead. 10. Line up the hoist cable with the centerline of the armature before engaging the hook in the liftin[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 31 2. Suspend the part in a position accessible from all directions to a direct flow of steam from the hose. 3. Rinse all residue from parts with a mixture of clean steam and water . 4. Bake insulated parts for at least 8 hours at 150  C (302  F) to remove all moisture. V apor Degreasing (R[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 32 tion. A reading of one megohm or higher should be obtained. If necessary , perform additional cleaning and baking operations to obtain this val- ue before proceeding. NOTE: If additional cleaning and baking opera- tions do not increase the resistance value of the insulation, it may be necessar[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 33 49 48,77 37 61 60,78 49 17, 71 32 70 8 67 9,65 6, 66 32 3 52, 76 11 13 33 29 7, 69 5, 68 16 1 ASSEMBLE AROUND BUTTED JOINT OF PT48 ASSEMBLE IN LINE WITH NO. 1 SLOT 3/4 LAPPED P70 TO BE APPLIED OVER P68 TO LEVEL THE SURFACE 28 ACTIVE TURNS A T 400 50 LB. TENSION OVER TOP OF EQUALIZERS EXTEND A [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 34 APPLY 35 ACTIVE TURNS OF P38 A T 600 20 LB. TENSION 12 18,19,20,75 11 62 1 26 14 15 3 55 1 2 4 27 39 38 SEE NOTE 2–5/8 +1/8 –0 25 4–7/8 MAX. 5 REQ’D. 1–1/16 1/16 + – 39 PT26 TO BE APPLIED OVER COILS TO LEVEL THE SURFACE SA TURA TE P2 THOROUGHL Y WITH P56 FIRST TURN 2ND DECK LAST TU[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 35 FIG. 20. ARMA TURE SHAFT (334B336 CHG. D). E–39091A. MODELS SEE T ABLE 2 4. Conduct a 500 volt megohmmeter test on the coils. A reading of 20 megohms or more is ac- ceptable. 5. See Figs. 21 thru 24 and measure and record commutating and exciting–coil resistance. Re- fe r t o T able 2 to d[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 36 briplate* ( P a r t 147X1614), Molykote** (Part 147X1 143), Dag*** (Part 147X1613), or anti–seize compound (Part 147X1640) to lubricate bolts. NOTE: Threads and washer–contact surfaces must be clean before lubricant is applied. Where specific torque values are not listed in these instructi[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 37 ARMA TURE Creepage Band Replacement Because of its superior adhesion qualities, the T eflon creepage band on the outer end of the commutator should be applied using the “hot bond” process. A copy of this process is included in each T eflon Band Kit, Part No. 76518, which can be ordered fro[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 38 NOTE: Before rewinding the armature, first check the shaft pinion and bearing fits to deter- mine whether or not shaft replacement is re- quired. See T able 2 to determine the correct shaft drawings. The armature can be rewound using a GE Co. Sup- ply Kit, Part 41D730545G8, and the information[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 39 If necessary , tighten the appropriate cap bolts to obtain this parallel relationship between the face of the cap and the segments. 2. Remove ONE bolt. Clean and lubricate the bolt threads under the bolt head. Reassemble bolt, and torque to 97 lb.–ft. 3. Repeat Step 2 for remaining bolts, fo[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 40 FIG. 22. CONNECTION DIAGRAM (41A237276 CHG. 0). E–39093A. MODELS SEE T ABLE 2 T O CHANGE MOT OR DIRECTION: T O RUN CCW VIEWED FROM COMMUT A TOR END, CONNECT : F1 T O POSITIVE F2 T O NEGA TIVE A1 T O POSITIVE A2 T O NEGA TIVE T O RUN CW VIEWED FROM COMMUT A TOR END, CONNECT : F1 T O NEGA TIVE[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 41 FIG. 23. CONNECTION DIAGRAM (41A330278, CHG. 0). E–38055B. MODELS SEE T ABLE 2 T O CHANGE MOT OR DIRECTION: T O RUN CCW VIEWED FROM COMMUT A TOR END, CONNECT : F1 T O POSITIVE F2 T O NEGA TIVE A1 T O POSITIVE A2 T O NEGA TIVE T O RUN CW VIEWED FROM COMMUT A TOR END, CONNECT : F1 T O NEGA TIV[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 42 FIG. 24. CONNECTION DIAGRAM (41A330179, CHG. A). E–37950A I O N #1 #46 S #2 #184 #22 #23 #12 #92 #93 #94 – – I – – I – – I – – I – – I – – I – – I – – O O O O O O O N N N S S S #1 EVER Y B A R EQUALIZED VIEW A T COMMUT A TOR EN D A1 A2 F1 F2 MODEL SEE T ABLE 2[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 43 FIG. 25. COMMUT A TOR TIGHTENING. E–4270B. W ARNING: During resurfacing operations, eye protection and a respirator should be worn to protect personnel from dust and fly- ing particles. use slot guides and depth gauges for accurate, uniform cuts. Make a few practice passes over a scrap commu[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 44 edges of the bars. See Fig. 12 for an illustration of the tool. Another method of removing copper fins is to rake the slots with a piece of fiberboard approximately 0.045 in. thick. 2. After slots have been raked with fiberboard or a raking tool, sand the commutator with fine sand- paper to re[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 45 MOTOR FRAME FIELD COIL REPLACEMENT Refer to T able 2, Page 20, to determine the correct coiled frame assembly drawing for the machine being repaired. Coil Removal 1. Remove terminal insulation and disconnect coil leads. Use a gas torch or brazing tongs to sepa- rate brazed connections. When us[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 46 17 15,16 29 37 15,16 10 11 , 45 VIEW A T Z OF BRUSH HOLDER CONNECTION 15, 16, 17 7 18, 19 5 4 6 30 62 33, 35 8 16, 17, 54 31 1 22, 49 A2 12,46 A1 1 1,45 29 26 28 10 15,16 Z E E APPL Y ONE COA T O F P 2 3 AFTER ALL P18 & P19 T APINGS. VIEW OF COMM. END 18,19 9 15, 16, 17 2 24 SEE NOTE 26 D [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 47 62 1 VIEW A T A ENLARGED (TYPICAL) ASSEMBLE FLUSH T O T OP OF INSIDE W ALL WITHIN .25 & TIGHEN UNTIL PLUG IS EXP ANDED & TIGHT IN HOLE + – 2, 3 15 16 9 2,3 17 17 VIEW A T B ENLARGED (TYPICAL) 41 42 42,44 SIDE VIEW OF COMM. CHAMBER SHOWING PLUGS ON SIDE OPPOSITE CONNECTION BOX. 42,44 [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 48 1 1,13 50 18 8,60 33 6 11 , 13 VIEW A T Z OF BRUSH HOLDER CONNECTION 1 1,13 6 2, 26 3 5 16, 17 25 SEE NOTE 2 4 48 18 75 39, 41 75 46 35 49 21,64 8 A1, 60 9 A2, 61 13,18,66 50 28 Z F F D 37 6 VIEW OF COMM. END FILL C’BORES WITH P25 (24 PLACES) .19 + – .06 30 51 75 VIEW OF PINION END ENLARGE[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 49 22 VIEW SHOWING METHOD OF ASSEMBLING CABLES THRU ST APLES. (PINION END) 20 19 BEFORE ASSEMBLING CONNECTIONS, INSULA TE CABLE SUPPORTS AS SHOWN WITH P19 T APED WITH P20 (COMM. END) MAG. FRAME WALL ST APLE 6 SECTION F–F A TT ACH BRUSH HOLDER CABLES AGAINST INSIDE WALL OF MAG. FRAME. 12 7,10,45[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 50 FIG. 31. COILED FRAME ASSEMBL Y (41D735440, CHG. A). E–38056B NOTE FOR P ARTS 37,38,39: INSULA TE EXCITING AND COMMUT A TING FIELD COIL TERMINALS BY FILLING ALL CA VITIES AND COVERING ALL BOL T HEADS WITH P37 THEN INSULA TE ENTIRE TERMINAL ASSEMBL Y WITH 1T–1/2 L. OF P38 AND 1T–1/2 L. OF[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 51 FIG. 31. COILED FRAME ASSEMBL Y (41D735440, CHG. A). E–38056B. REF . DESCRIPTION 1 MAGNET FRAME 4 BOL T(NON–MAGNETIC), 1 1/4–12X4 5 HARD WASHER, 1 1/4 6 BO L T , 1 1/4–7X3 3/4 7 EXCITING COIL AND POLE 8 BUSHING 9 CABLE 10 CABLE 1 1 CABLE 12 CABLES 13 CABLES 14 CABLE 15 CABLE 16 MARKER [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 52 FIG. 32. COILED FRAME ASSEMBL Y (41D735343, CHG. C). E–37951C FILL C’BORES WITH P31 (12–PLACES) 38 36, 38 15 17 16 36,38 1, 39 24 19 32 18 37,38 11 20,21 8, 9 8,9 22, 23 38 38 38 15 38 36, 38 38 32 24 7,10 FOR FILLETS 8–PLACES TYPICAL 20, 21 11 8,9 8,9 11 20,21 20, 21 11 COMMUT A TOR E[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 53 FIG. 32. COILED FRAME ASSEMBL Y (41D735343, CHG. C). E–37951C + – 5 NOTE FOR PTS. 33, 34, AND 35 INSULA TE EXCITING AND COMMUT A TING FIELD COIL TERMINALS BY FILLING ALL V A VITIES WITH P33 THEN INSULA TE ENTIRE TERMINAL ASSEMBL Y WITH 2T–1/2L. OF P34 AND 2T–1/2L. OF P35. V .P .I. COIL[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 54 NOTE: If a gas torch is used, coil insulation must be protected from heat by a non–flam- mable heat absorbent. 1. P ack absorbent around the insulation near the connection and over adjacent coils. 2. Make sure all exposed insulation is covered with a thick layer of absorbent, then heat and s[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 55 Flood Dipping Coiled Frame After field coils have been repaired or replaced and electrical tests completed, insulate the coiled frame by flood dipping in GE–8001 varnish. See T able 4, Page 55, for varnish viscosity limits. V arnish may be thinned, as necessary , with Solves- so* No. 100 thi[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 56 Minimum V olts 7.3 . . . . . . . . . . . . . . . . . . . . . . . Maximum V olts 8.5 . . . . . . . . . . . . . . . . . . . . . . . For Magnetic retainers: Minimum V olts 0.7 . . . . . . . . . . . . . . . . . . . . . . . Maximum V olts 12.4 . . . . . . . . . . . . . . . . . . . . . . High–Pote[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 57 Armature Bearings NOTE: Parts that will be shrink–fitted should b e heated in an oven and assembled hot. Make sure shrink–fitted parts are tight against adja- cent parts after they have cooled. Drive–End Bearing (Figs. 34, 35, 36 and 37) 1. Place the armature in a saddle. 2. I f the inne[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 58 FIG. 34. DRIVE–END BEARING ASSEMBL Y . E–18166E. SMEAR 0.50 OZ. OF GREASE ON GREASE SEALS. MODELS SEE T ABLE 2, P AGE 20 NOTE: Do not heat the bearing and housing a s- sembly above 100  C (212  F). Higher tempera- tures may cause the oil to “bleed” from the grease. 7. Heat spacer[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 59 FIG. 35. DRIVE–END BEARING ASSEMBL Y . E–39301. MODELS SEE T ABLE 2, P AGE 20 The bearing assembly will be completed when the armature is assembled into the frame. Commutator–End Bearing (Models US2, UP6, AUT2 and AUP5) Refer to Fig. 39. 1. Clean and inspect the bearing and the shaft bea[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 60 FIG. 36. DRIVE–END BEARING ASSEMBL Y (41B537821, CHG. B). E–37952B 13 12 17 2 4,5 20 3 6 14 ASSEMBLED T O EITHER P13 OR P17, DEPENDING ON MODEL. NOT INCLUDED ON ALL MODELS NOT INCLUDED ON ALL MODELS APPL Y P15 TO THREADS A T BOTH ENDS OF P12 USE IF NECESSARY T O ADJUST FOR PROPER ASSEMBL Y[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 61 5. Heat bearing housing (2) in an oven to 100  C (212  F). While hot, assemble nilos ring (4) (ori- ented as shown in Fig. 40), and the ball bearing (3 ) into the housing firmly against the shoulder at the bottom of the bearing fit. 6. Fill all voids in the ball bearing completely with a[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 62 FIG. 38. COMMUT A TOR–END BEARING ASSEMBL Y (41B532745 CHG. F). E–39090A. MODELS SEE T ABLE 2, P AGE 20 8. Install framehead bolts (10) and lockwashers (12). T orque to 440–495 lb.–ft. CAUTION: Alternate tightening of commu- tator–end bearing housing and drive–end framehead bolts. [...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 63 FIG. 39. COMMUTA TOR-END BEARING AS SEMBL Y (41B538068 CHG. 0). E-39300. 1 12 9,10 8 7 6 USE 5.2 OZ . OF P11 IN THIS CA VITY FILL BEARING COMPLETEL Y WITH 20.8 OZ . OF P11 2 3 4 5 13 USE 5.2 OZ . OF P11 IN THIS CA VITY APPL Y NALCO RC TO BORE OF P7 AND SHAF T HEA T P7 TO 180 C. (356 F) RISE AN[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 64 OUTER BEARING RACE WITH ROLLERS BEARING CAGE INNER BEARING RACE FRAMEHEAD SHAF T FEELERS FIG. 40. CHECKING INTERNAL CLEARANCE OF BEARING. A-120403. 1 1. Th e clearance between the rollers and the inner race should measure between 0.0012 and 0.004 in. T ry various gauge thicknesses until cleara[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 65 6. Lower the armature slowly into the frame, being careful not to damage the commutator . When the armature is almost fully inserted, use the guide studs to align bearing housing (3) and framehead bolt holes (14). 7. When the armature has reached its limit of travel, remove the guide studs and[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 66 3. Attach the brush–shunt terminals to the brush- holder body under the screws provided. 4. Inspect the interior of the machine for foreign ob- jects. Install the commutator covers on the motor and check for proper fit and latch operation. 5. Clean the terminals. HUB MOUNTING Hub Fitting NOT[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 67 CAUTION: Zero settings of advance gauge must not be disturbed until all readings on the hub are completed. Heat the hub in an oven until it has reached a uni- form temperature (the desired number of de- grees above shaft temperature). For example, i f shaft temperature is 25  C (77  F), [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 68 ing caps. Thermometers should contact the bearing caps for best results. 2. Seat the brushes and run for ten minutes at 900 rpm. Frame temperature should not exceed 25 C rise. 3. With machine running up to speed, measure vi- bration. V ibration should not exceed 0.002 on commutator end. If vib[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 69 W ARNING: Electric shock can cause serious or fatal injury . T o avoid such injury , personnel should take and observe proper precautions during the high–potential testing. REMOVING ARMA TURE LOCKING ARRANGEMENT (See Fig. 43) 1. Remove the two shipping bolts (1) from the bear- ing cap. These[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 70 1. Remove all corrosion. 2. Wipe o f f the surface with clean rags and wet with petroleum spirits GE–D5B8. 3. Follow with a clean rag wet with methanol, then wipe dry . DO NOT touch the cleaned surface with bare hands. 4. Slush immediately after cleaning with GE–D6C6A1 slushing compound. S[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 71 FIG. 45. BOX FOR SHIPPING ARMA TURES. E–3782A. 50–1/2 2 X 6 X 20–1/2 (8 PIECES) ALL DIMENSIONS IN INCHES 9–1/2 1 X 6 X 22 (NO HOLE) 3 X 6 1 X 6 X 57–1/2 (18 PIECES) 1 X 6 X 22 (2 PIECES) WITH HOLES 2 X 6 X 24 (4 PIECES) 1 X 6 X 22 (18 PIECES) 2 SKIDS – 3 X 6 X 57–1/2 support the [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 72 examined for rust. Any rust found should be re- moved using fine abrasive paper , after the old slushing compound has been removed with min- eral spirits (GE–D5B8). Methanol should be used to remove all residue. W ARNING: Cleaning solvents may be toxic and/ or inflammable. They can cause ser[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 73 3. Check winding insulation continuity to ground with a 500 volt megger . If the megger reading is less than 2 megohms, the winding should be baked or dried until the moisture content is suf fi- ciently reduced to raise the megger reading to 2 megohms. 4. An electrical source of heat is best f[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 74 FIG. 48. OUTLINE, UP AND AUP (41E903631 CHG. H). E–28755B. 15.09 16.82 + – .25 15.53 16.656 +.000 –.010 15.09 16.82 + – .25 1.72 18.00 14.78 36.000 +.000 –.010 AIR OUT (4 CORNERS) .50–13 T AP X 1.00 DEEP 8 HOLES F1 F2 ONE .25 PIPE PLUG–REPLACE WITH GREASE FITTING FOR 2.25 DIA. (3[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 75 FIG. 48. OUTLINE, UP AND AUP (41E903631 CHG. H). E–28755B. 58.50 AIR OUT 9.56 13.43 + – .06 9.24 F 10.50 23.12 1.38 1.74 8.25 6.50 G 3.19 2.38 – .12 1.00 R. 3.62 7.88 1.06 1.06 + – .06 G + + – .005 1 1.375 DIA. C ARMA TURE L .50 NPT FOR AIR PRESSURE MEASUREMENT A1 F2 F1 ONE .25 PIPE [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 76 FIG. 48. OUTLINE, UP AND AUP (41E903631 CHG. H). E–28755B. + – .005 1 1.375 DIA. GREASE VENT TUBE FITTING ”A” SEE T ABLE 1 GREASE TUBE FITTING ”B” SEE T ABLE 1 2.00 DIA. 4 BOSSES .50 NPT THRU 2 HOLES GREASE TUBE FITTING ”C” SEE T ABLE 1 .562 DIA. THRU 2 HOLES 1.25 T APER IN DIA[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 77 FIG. 48. OUTLINE, UP AND AUP (41E903631 CHG. H). E–28755B. 21.00 T OP INSPECTION COVER MINIMUM REQUIRED T O REMOVE COVER .812 DIA. X 1.94 DEEP 8 HOLES EQ. SP ACED ON 25.00 DIA. B.C. .50 NPT 2 HOLES REF . 1.00–8 UNC–2B THREAD X 1.50 DEEP 8 HOLES EQ. SP ACED ON 25.00 DIA. B.C. .562 DIA. 2 [...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 78 FIG. 49. OUTLINE, US1, AUT (41E903745, CHG. A). E–37954B + – .25 16.82 15.53 16.656 .000 .010 36.000 .000 .010 .50–13 T AP 1.00 DEEP (8HOLES) .25 NPT FOR REGREASING 2.25 DIA. (3 HOLES) FOR LIFTING AIR OUT (4 CORNERS) AIR OUT + – + – 1.72 THIS AREA OF FOOT FLUSH WITH FRAME F ACE. BOTH[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 79 FIG. 49. OUTLINE, US1, AUT (41E903745, CHG. A). E–37954B 58.50 AIR OUT 8.55 1.06 4.63 7.88 6.37 5.69 1.06 + – 1 1.375 DIA. .005 13.44 + – .078 .059 5.25 4.25 23.12 1.74 10.50 1.38 8.25 6.50 16.500 16.500 22.120 2.38 + – .12 3.19 1.00 R. 3.62 5.25 .75–10 T AP THRU (2 HOLES) 1.005 DIA.[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 80 FIG. 49. OUTLINE, US1, AUT (41E903745, CHG. A). E–37954B 1 1.375 + – .005 5.31 .562 DIA. THRU (2 HOLES) 9.50 13.50 1.25 T APER IN DIA. PER FT . IN LENGTH (BOTH ENDS) 3.125–8 NS–2A THREADS (BOTH ENDS) AIR INLET .50–13 T AP 1.00 DEEP (6 HOLES) VIEW A T ”D” AIR INLET FLANGE TOP INSP[...]

V ertical Drilling Motor , T ype GE752, GEK–91584D 81[...]

GEK–91584D, V ertical Drilling Motor , T ype GE752 82 PRINTED IN U.S.A. E GE Transportation Systems 2901 East Lake Road Erie, Pennsylvania 16531 NEW 5–90, WLF REVISED 10–90, WLF REVISED 8–92, WLF REVISED 1 1–93, WLF REVISED 02–05, NBS[...]