GEK–91584D VERTICAL DRILLING MOTOR TYPE GE752 CONTENTS CONTENTS (CONT’D) Page INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . 2 DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SPECIAL TOOLS AND EQUIPMENT . . . . . . . . . . . 8 GROUNDING INSTRUCTIONS . . . . . . . . . . . . . . . . 8 GROUNDING PROCEDURES . . . . . . . . . . . . . . . 9 OVERHAUL . . . . . . . . . . . . . . . . . . . .
GEK–91584D, Vertical Drilling Motor, Type GE752 GENERAL DESCRIPTION GE752 motors are used by the oil and gas industry to power offshore and land–based drill rigs. Designed for vertical operation, they are d–c machines which require a nominal 750 volt d–c power source. With suitable switching, they will operate equally well in either rotational direction. The following provides a listing of basic features.
Vertical Drilling Motor, Type GE752, GEK–91584D TABLE 1. MODEL DIFFERENCES Motor Model Differences 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.
GEK–91584D, Vertical Drilling Motor, Type GE752 TABLE 1 (Cont’d) MODEL DIFFERENCES Motor Model Differences Superseded By 752AUP3 Same as AUP2 except: – Has a single grease tube at drive end which is part of framehead/bearing assembly for ease of armature disassembly. 752AUP4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 temperatures. 752AUP5 Same as AUP4 except: – Has an improved commutator–end bearing assembly and an ABS–certified armature shaft.
Vertical Drilling Motor, Type GE752, GEK–91584D DATA (Cont’d) Carbon Brushes Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T900 Size (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3/4 x 2–1/4 x 2 Minimum Brush Length (length at which brush becomes inoperative) (in.) . . . . . . . . . . . . . . .
GEK–91584D, Vertical Drilling Motor, Type GE752 DATA (Cont’d) Pole Bore Diameter (measured at center of pole) (in.) Motors: Exciting Poles (Shunt models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exciting Poles (Series models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Commutating Poles (Both Shunt and Series models) . . . . . . . . . . . . . . . . . . . . Min. 19.606 19.613 19.956 Max. 19.640 19.640 19.
Vertical Drilling Motor, Type GE752, GEK–91584D DATA (Cont’d) Motor Ratings* Continuous Max. HP Shunt (UP) Volts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750 Armature Amps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1050 Field Amps . . . . . . . . . . . . . . . . . . . . . . . .
GEK–91584D, Vertical Drilling Motor, Type GE752 SPECIAL TOOLS AND EQUIPMENT GROUNDING INSTRUCTIONS 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 adequate supply of non– contaminated cooling air must be provided.
Vertical Drilling Motor, Type GE752, GEK–91584D decks by bolting or welding should not require additional grounding. (References: ABS Rules for Building and Classing Steel Vessels, Section 35.9.6, and IEEE Standard 45–1977, Recommended Practice for Electrical Installations on Shipboard, Section 21.4.) 5. OVERHAUL GROUNDING PROCEDURES (Fig. 2) Most GE drilling machines have extra tap blocks on the frame for mounting of the connection boxes. One of these may be used for attaching the grounding cable.
GEK–91584D, Vertical Drilling Motor, Type GE752 INSPECTION MONTHLY Inspect the exterior of the machine, including cables, for damage. Covers, Seals, Latches Clean the outside of the machine and remove the inspection covers. Use clean, dry compressed air and blow the dirt and carbon dust from the interior of the machine. WARNING: When using compressed air for cleaning purposes, flying debris and particles may present a hazard to personnel in the immediate area.
Vertical Drilling Motor, Type GE752, GEK–91584D 3. Continue tapping as described in Step 1 until the 0.753 dimension falls between 0.751 and 0.755. spots caused by flashovers. Replace any damaged brushholder or one having a damaged sleeve. 4. If, due to excessive pounding, the inside dimension becomes less than 0.751 in., file back to size with a fine mill file. WARNING: MEK is a volatile solvent. The fumes should not be inhaled.
GEK–91584D, Vertical Drilling Motor, Type GE752 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 sufficient length to last until the next inspection.
Vertical Drilling Motor, Type GE752, GEK–91584D ger over the center of each brush. See the DATA section for limits. Insulation Measure the insulation resistance with a meg– ohmmeter (Megger) to determine the condition of the insulation. If reading is low, make a further inspection to determine if insulation failure or excessive moisture is causing the low megohmmeter reading. Correct the cause of low readings before returning the motor to service. 1. Remove the commutator inspection covers. 2.
GEK–91584D, Vertical Drilling Motor, Type GE752 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. Tighten bolt but do not torque until the brushholder–to–commutator clearance has been established. Refer to Brushholder Clearance Adjustment section for instructions to adjust brushholder clearance. 3. 4.
Vertical Drilling Motor, Type GE752, GEK–91584D NOTE: When shutting down, increase the field supply to maximum, and then turn off the armature supply. After the armature supply has been shut off, shut down the field supply. Sanding Procedure 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).
GEK–91584D, Vertical Drilling Motor, Type GE752 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 possibility of an eventual flashover which could seriously damage the machine. WARNING: Do not come into close proximity of an energized motor during the cleaning process.
Vertical Drilling Motor, Type GE752, GEK–91584D FIG. 11. COMMUTATOR 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 finish–grade stones for the final grinding. If new stones will be used, they should be contoured on a Carborundum wheel to approximate the curvature of the commutator.
GEK–91584D, Vertical Drilling Motor, Type GE752 2. Turn the feed control to back the stones away from the commutator before starting the machine. NOTE: If possible, use some method of collecting the copper chips and abrasive dust produced by the grinding operation. For example, use a vacuum cleaning device with the suction wand set just behind the trailing edge of the stones. Grinding Apply power to the machine and gradually increase speed to 900–1000 rpm. 7.
Vertical Drilling Motor, Type GE752, GEK–91584D WARNING: When using compressed air for cleaning purposes, flying debris and particles may present a hazard to personnel in the immediate area. Personnel should be provided with, and trained in the use of, personal protective equipment as specified by applicable federal or state safety regulations. 3. Increase the machine speed to approximately 900 rpm and blow air on the commutator until the sparking stops. 4.
GEK–91584D, Vertical Drilling Motor, Type GE752 TABLE 2. DRAWING REFERENCE GE752 Model Inst. Book Longi– tudinal Puller Tools Comm. Pinion End End Arm. Shaft AUP1 Fig. 15 Fig. 16 Fig. 17 Fig. 20 Fig. 22 Fig. 29 Fig. 34 AUP2 Fig. 15 Fig. 16 Fig. 17 ––– Fig. 22 Fig. 29 AUP3 Fig. 15 Fig. 16 Fig. 17 ––– Fig. 22 AUP4 Fig. 15 Fig. 16 Fig. 17 ––– AUP5 Fig. 15 Fig. 16 Fig. 17 AUT1 Fig. 18 Fig. 16 Fig. 17 AUT2 Fig. 18 Fig. 16 UP1 Fig. 15 UP2 Arm.
Vertical Drilling Motor, Type GE752, GEK–91584D heavy paper around the commutator for protection 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 grease tube (19). c. On all other models, only a pipe plug is provided in the bearing cap. 3 FIG. 13. COMMUTATOR–END BEARING PILOT. E–18150. 5.
GEK–91584D, Vertical Drilling Motor, Type GE752 VIEW OF COMMUTATOR END FOR ALL MODELS EXCEPT UP1, UP2, AUP1 AND AUP2 VIEW OF PINION END FOR ALL MODELS EXCEPT UP1, UP2, AUP1 AND AUP2 THIS GREASE TUBE CONFIGURATION IS APPLICABLE TO MODELS UP1, UP2 AUP1 AND AUP2 ONLY. SEE VIEW ABOVE FOR ALL OTHER MODELS 56 57 52 42 43 44 45 46 FIG. 15. LONGITUDINAL SECTION (41D732922 CHG. N). E–28621D.
Vertical Drilling Motor, Type GE752, GEK–91584D VIEW OF COMMUTATOR END FOR UP6 AND AUP5 NOTE: UP1 AND AUP1 MODELS HAVE 2 TUBE ASSEMBLIES, UP2 AND AUP2 HAVE ONE. 55 53 51 54 47 50 49 48 MODELS SEE TABLE 2, PAGE 20 FIG. 15. LONGITUDINAL SECTION (41D732922 CHG. N). E–28621D.
GEK–91584D, Vertical Drilling Motor, Type GE752 REF. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 DESCRIPTION COILED FRAME COILED FRAME ARMATURE AND BEARING ASSEMBLY OUTER BEARING CAP OUTER BEARING CAP CARBON BRUSH COVER (TOP INSPECTION) COVER (BOTTOM INSPECTION) COVER (HAND HOLE) BOLT (FRAMEHEAD), N22P39032, 1.00–8 X 2.00 BOLT (FRAMEHEAD), N22P39036, 1.00–8 X 2.25 LOCKWASHER, N405P50P, 1.
Vertical Drilling Motor, Type GE752, GEK–91584D REF 4 5 6 DESCRIPTION CLAMP PLATE BOLT PRESSURE CAP REF 12 18 20 DESCRIPTION NUT, 5/8–11 RING STUD REF 21 22 23 DESCRIPTION STUD STUD NUT, 7/16–14 FIG. 16. PULLER TOOLS (41D731569 CHG. 0). E–14383C. 8. Reach into the drive–end of the motor and disconnect grease tubes. a. On UP1 and AUP1 models, disconnect two grease tubes (21 and 22) from the inner bearing cap (51). Pull these tubes out through their hole in the frame.
GEK–91584D, Vertical Drilling Motor, Type GE752 REF 4 5 6 12 DESCRIPTION CLAMP PLATE BOLT PRESSURE CAP NUT, 5/8–11 REF 17 18 19 20 DESCRIPTION CLAMP RING CLAMP STUD REF 21 22 23 DESCRIPTION STUD STUD NUT, 7/16–14 FIG. 17. PULLER TOOLS. E–18155A. framehead, jack the drive–end framehead loose, and lift the complete armature assembly out of the frame. DO NOT DAMAGE THE COMMUTATOR. 13. Move the armature to a suitable fixture for further bearing disassembly or repair. 26 14.
Vertical Drilling Motor, Type GE752, GEK–91584D end up and remove bolts (11) and lockwashers (12). Use bolts in the framehead jackout holes to break the fit and remove the framehead. 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.
GEK–91584D, Vertical Drilling Motor, Type GE752 9 VIEW OF COMMUTATOR END FIG. 18. LONGITUDINAL SECTION (41D735357, CHG. A).
Vertical Drilling Motor, Type GE752, GEK–91584D REF. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 DESCRIPTION SHAFT SLEEVE BEARING HOUSING BALL BEARING SPACER SLEEVE CAP BEARING CAP (OUTER) PIPE PLUG BOLT AND LOCKWASHER GASKET BOLT BOLT AND LOCKWASHER FRAME HEAD FLASH RING BRUSH HOLDER CLAMP BOLT AND LOCKWASHER BRUSH HOLDER CARBON BRUSH COMMUTATING FIELD COIL COMMUTATING POLE BOLT AND HARDENED WASHER REF.
GEK–91584D, Vertical Drilling Motor, Type GE752 8. Screw a lifting bail, Fig. 14, on the drive end of the shaft. 9. Remove drive–end framehead bolts (30) and insert three jack screws in the threaded holes provided in the framehead. 10. Line up the hoist cable with the centerline of the armature before engaging the hook in the lifting bail on the end of the shaft. Engage the hook and lift slightly.
Vertical Drilling Motor, Type GE752, GEK–91584D 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. Vapor Degreasing wear on rollers and balls. Replace the bearing if any of these conditions is found. 3.
GEK–91584D, Vertical Drilling Motor, Type GE752 tion. A reading of one megohm or higher should be obtained. If necessary, perform additional cleaning and baking operations to obtain this value before proceeding. NOTE: If additional cleaning and baking operations do not increase the resistance value of the insulation, it may be necessary to replace the creepage band and rewind the armature. 2. Measure and record armature resistance. See the DATA section for values. 3.
Vertical Drilling Motor, Type GE752, GEK–91584D 3/4 REF. ASSEMBLE AROUND BUTTED JOINT OF PT48 49 ASSEMBLE AROUND BUTTED JOINT OF PT48 49 4–1/4 61 37 1/4 60,78 1/4 48,77 ASSEMBLE IN LINE 1 WITH NO. 1 SLOT 17, 71 16 5, 68 7, 69 29 33 32 70 P70 TO BE APPLIED OVER P68 TO LEVEL THE SURFACE 9,65 67 3/4 LAPPED 28 ACTIVE TURNS AT 400 + –50 LB. TENSION OVER TOP OF EQUALIZERS 11 13 3 32 EXTEND A THIN COATING OF PT32 OVER TOP OF EQUALIZERS BOTH DECKS 8 52, 76 6, 66 53 5/8 3/8 REF. 3 11–1/4 R.
GEK–91584D, Vertical Drilling Motor, Type GE752 5 REQ’D. + 1/16 – 1–1/16 38 SEE NOTE +1/8 –0 2–5/8 39 27 39 18,19,20,75 12 4–7/8 MAX. 25 4 11 14 1 15 62 3 55 1 NOTE FOR TEMPORARY BINDING: APPLY TEMPORARY BINDING. 6 TOTAL PASSES WITH 0.102 DIAM. B4Y19B AT 800 LB. TENSION. BAKE IN A 150 C OVEN FOR 4 HOURS.
Vertical Drilling Motor, Type GE752, GEK–91584D MODELS SEE TABLE 2 FIG. 20. ARMATURE SHAFT (334B336 CHG. D). E–39091A. 4. 5. 6. Conduct a 500 volt megohmmeter test on the coils. A reading of 20 megohms or more is acceptable. See Figs. 21 thru 24 and measure and record commutating and exciting–coil resistance. Refer to Table 2 to determine the correct connection diagram for the machine being repaired. High–potential test the field coils to ground. BRUSHHOLDERS 1.
GEK–91584D, Vertical Drilling Motor, Type GE752 briplate* (Part 147X1614), Molykote** (Part 147X1143), Dag*** (Part 147X1613), or anti–seize compound (Part 147X1640) to lubricate bolts. BRUSHHOLDER SLEEVE REPLACEMENT 1. Remove the damaged Teflon sleeve from the brushholder stud. To remove sleeve, heat the brushholder in an oven to 150 C (302 F) then peel or cut sleeve from the stud. 2. Thoroughly clean the surface of the stud and remove any carbon or dirt build–up. 3.
Vertical Drilling Motor, Type GE752, GEK–91584D ARMATURE TABLE 3 STANDARD BOLT TORQUE VALUES (For Lubricated Bolts) Creepage Band Replacement Because of its superior adhesion qualities, the Teflon 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 Teflon Band Kit, Part No.
GEK–91584D, Vertical Drilling Motor, Type GE752 NOTE: Before rewinding the armature, first check the shaft pinion and bearing fits to determine whether or not shaft replacement is required. See Table 2 to determine the correct shaft drawings. 2. Hydraulic Press (Preferred Method) 1. Clean the front face of the cap and the segments, Fig. 25. Remove ONE bolt at a time, and lubricate the bolt threads and under the bolt head. See Lubrication of Bolts section. Follow the sequence shown on Fig.
Vertical Drilling Motor, Type GE752, GEK–91584D If necessary, tighten the appropriate cap bolts to obtain this parallel relationship between the face of the cap and the segments. 2. 3. 3. Remove ONE bolt. Clean and lubricate the bolt threads under the bolt head. Reassemble bolt, and torque to 97 lb.–ft. Heat the commutator to 155–165 C (312–330 F) in 60 minutes at 2940 rpm. Spin at 155–165 C (312–330 F) for 30 minutes at 2940 rpm. Cool to 50 C (112 F) maximum in 30 minutes at 2940 rpm.
GEK–91584D, Vertical Drilling Motor, Type GE752 MODELS SEE TABLE 2 TO CHANGE MOTOR DIRECTION: TO RUN CCW VIEWED FROM COMMUTATOR END, CONNECT: F1 TO POSITIVE F2 TO NEGATIVE A1 TO POSITIVE A2 TO NEGATIVE TO RUN CW VIEWED FROM COMMUTATOR END, CONNECT: F1 TO NEGATIVE F2 TO POSITIVE A1 TO POSITIVE A2 TO NEGATIVE FIG. 22. CONNECTION DIAGRAM (41A237276 CHG. 0). E–39093A. 4. 2. Cover the windings to keep out chips. 3.
Vertical Drilling Motor, Type GE752, GEK–91584D TO CHANGE MOTOR DIRECTION: MODELS SEE TABLE 2 TO RUN CCW VIEWED FROM COMMUTATOR END, CONNECT: F1 TO POSITIVE F2 TO NEGATIVE A1 TO POSITIVE A2 TO NEGATIVE TO RUN CW VIEWED FROM COMMUTATOR END, CONNECT: F1 TO NEGATIVE F2 TO POSITIVE A1 TO POSITIVE A2 TO NEGATIVE FIG. 23. CONNECTION DIAGRAM (41A330278, CHG. 0). E–38055B. small cracks in the mica into which dirt or moisture may accumulate and cause a breakdown in the insulation between the commutator segments.
GEK–91584D, Vertical Drilling Motor, Type GE752 –I – O O S –I – –I – #46 #1 O S #1 #2 N #184 #22 #23 O N EVERY BAR EQUALIZED #12 N –I – –I – O #92 N #93 #94 –I – A1 O S O S –I – O A2 –I – F2 F1 VIEW AT COMMUTATOR END TO CHANGE MOTOR DIRECTION: TO RUN CCW VIEWED FROM COMMUTATOR END, CONNECT: F1 TO POSITIVE F2 TO NEGATIVE A1 TO POSITIVE A2 TO NEGATIVE TO RUN CW VIEWED FROM COMMUTATOR END, CONNECT: F1 TO NEGATIVE F2 TO POSITIVE A1 TO POSITIVE A2 TO NEGATIVE MODEL SEE TABLE 2 F
Vertical Drilling Motor, Type GE752, GEK–91584D WARNING: When using compressed air for cleaning purposes, flying debris and particles may present a hazard to personnel in the immediate area. Personnel should be provided with, and trained in the use of, personal protective equipment as specified by applicable federal or state safety regulations. Raking FIG. 25. COMMUTATOR TIGHTENING. E–4270B.
GEK–91584D, Vertical Drilling Motor, Type GE752 2. 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. Used Armature After slots have been raked with fiberboard or a raking tool, sand the commutator with fine sandpaper to remove small pieces of copper sticking from edges of slots. Rewound Armature 3.
Vertical Drilling Motor, Type GE752, GEK–91584D Remove the pole bolts and the coil–pole assembly from the magnet frame. MOTOR FRAME FIELD COIL REPLACEMENT 3. Refer to Table 2, Page 20, to determine the correct coiled frame assembly drawing for the machine being repaired. Mark any shims for reassembly with the corresponding pole when the coil(s) is installed in the frame. Coil Installation Coil Removal Procedure for New Coil–Pole Assembly 1. Remove terminal insulation and disconnect coil leads.
GEK–91584D, Vertical Drilling Motor, Type GE752 15,16 17 29 11, 45 37 26 15, 16, 17 18, APPLY ONE COAT OF P23 19 AFTER ALL P18 & P19 TAPINGS. 15, 16, 17 7 5 9 4 10 24 SEE NOTE 26 2 18,19 15,16 29 VIEW AT Z OF BRUSH HOLDER CONNECTION D 6 3 15,16 E Z 10 11,45 A1 28 1 30 3 12,46 A2 62 22, 49 1 16, 8 31 17, 54 VIEW OF COMM.
Vertical Drilling Motor, Type GE752, GEK–91584D ASSEMBLE FLUSH TO TOP OF INSIDE 62 WALL WITHIN + .25 & TIGHEN UNTIL – PLUG IS EXPANDED & TIGHT IN HOLE 2, 3 15 16 2,3 17 17 1 VIEW AT A ENLARGED (TYPICAL) 41 42 9 VIEW AT B ENLARGED (TYPICAL) P44 FOR PRESSURE SWITCH USAGE ON CONNECTION BOX SIDE ONLY. IF NO PRESSURE SWITCH IS REQUIRED, PLUG HOLE WITH P42 CONN. BOX GROUND ARMOR WITH P52 (G3 & G4 ONLY) VIEW AT D 42,44 42,44 SECTION C–C 10 SIDE VIEW OF COMM.
GEK–91584D, Vertical Drilling Motor, Type GE752 8,60 11,13 50 VIEW AT Z OF BRUSH HOLDER CONNECTION 18 24 SEE NOTE 6 11,13 33 2, 26 3 28 5 16, 17 7 25 SEE NOTE 7 1 6 2 11, 13 50 4 13,18,66 FILL C’BORES WITH P25 (24 PLACES) 37 Z F 9 A2, 61 22 58 36 57 48 6 F 12,14,15 22 22 18 75 8 A1, 60 10 F1 .19 21,64 49 + .06 – 7 39, 41 46 35 D 75 59 45 F2 B 38,41,76 FILL C’BORES WITH P25 (24 PLACES) 51 VIEW OF COMM.
Vertical Drilling Motor, Type GE752, GEK–91584D 12 19 20 BEFORE ASSEMBLING CONNECTIONS, INSULATE CABLE SUPPORTS AS SHOWN WITH P19 TAPED WITH P20 (COMM. END) 22 VIEW SHOWING METHOD OF ASSEMBLING CABLES THRU STAPLES. (PINION END) 54 7,10,45 COIL TERM. OR CABLE TERM. MAG. FRAME WALL STAPLE 6 15 14 VIEW SHOWING METHOD OF CONNECTING SHUNT CABLES. SECTION F–F ATTACH BRUSH HOLDER CABLES AGAINST INSIDE WALL OF MAG. FRAME.
GEK–91584D, Vertical Drilling Motor, Type GE752 TORQUE TABLE PART SIZE TORQUE LBS.–FT. 4 1.25–12 435–483 6 1.25–7 900–995 21 .875–9 240–260 23 .4375–14 25–35 28 .25–20 6–8 MODEL US1 MODELS SEE TABLE 2, PAGE 20 NOTE FOR PARTS 37,38,39: INSULATE EXCITING AND COMMUTATING FIELD COIL TERMINALS BY FILLING ALL CAVITIES AND COVERING ALL BOLT HEADS WITH P37 THEN INSULATE ENTIRE TERMINAL ASSEMBLY WITH 1T–1/2 L. OF P38 AND 1T–1/2 L. OF P39.
Vertical Drilling Motor, Type GE752, GEK–91584D REF. 1 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 DESCRIPTION MAGNET FRAME BOLT(NON–MAGNETIC), 1 1/4–12X4 HARD WASHER, 1 1/4 BOLT, 1 1/4–7X3 3/4 EXCITING COIL AND POLE BUSHING CABLE CABLE CABLE CABLES CABLES CABLE CABLE MARKER MARKER TAG BRUSHHOLDER ASSEMBLY BRUSHHOLDER SUPPORT BOLT, 7/8–9X3 1/4 LOCKWASHER, 7/8 REF.
GEK–91584D, Vertical Drilling Motor, Type GE752 FILL C’BORES WITH P31 (12–PLACES) 38 36, 38 38 15 13, 14 7,10 17 22, 23 FOR FILLETS 8–PLACES TYPICAL 8,9 16 1,39 12 CARBON BRUSH 8,9 20, 11 21 20,21 11 38 11 11 20, 21 37,38 24 32 18 VIEW SHOWING BRUSH HOLDER ASSEMBLY (COMMUTATOR END) 36,38 11 20,21 8,9 38 A1 32 24 19 A2 36, 38 38 1, 39 38 15 8, 9 1,39 COMMUTATOR END FILL C’BORES WITH P31 (12–PLACES) 22, 23 FOR FILLETS 8–PLACES TYPICAL 28 6, 7 25 28 .09 MIN. TYP.
Vertical Drilling Motor, Type GE752, GEK–91584D REF. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 DESCRIPTION MAGNET FRAME EXCITING COIL EXCITING COIL EXCITING POLE SPRING COLLAR BOLT 1 1/4–7 X 3 3/4 HARDENED WASHER 1 1/4 COMMUTATING COIL COMMUTATING POLE BOLT 1 1/4–12 X 4 BRUSH HOLDER ASSEMBLY BRUSH HOLDER SUPPORT BOLT 7/8–9 X 3 1/4 N22P37052 LOCKWASHER 7/8 N405P49P CABLE CABLE CABLE CABLES CABLES PART 6 10 13 20 REF.
GEK–91584D, Vertical Drilling Motor, Type GE752 NOTE: If a gas torch is used, coil insulation must be protected from heat by a non–flammable heat absorbent. 1. 2. 2. Pack absorbent around the insulation near the connection and over adjacent coils. Make sure all exposed insulation is covered with a thick layer of absorbent, then heat and separate the coil connections. Heat the coiled frame in an oven at 150 C (302 F) for four hours to soften the varnish so pole bolts can be removed. Machine Brazing 1.
Vertical Drilling Motor, Type GE752, GEK–91584D 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 Table 4, Page 55, for varnish viscosity limits. TABLE 4 VARNISH VISCOSITY CHART FOR DIPPING COILED FRAME NOTE: When necessary, use Solvesso No. 100 to thin varnish. GE NO. 8001 VARNISH NO. 3 ZAHN CUP Varnish may be thinned, as necessary, with Solvesso* No. 100 thinner.
GEK–91584D, Vertical Drilling Motor, Type GE752 Minimum Volts . . . . . . . . . . . . . . . . . . . . . . . 7.3 Maximum Volts . . . . . . . . . . . . . . . . . . . . . . . 8.5 For Magnetic retainers: Varnish Immersion Treatment After VPI (Armature) The following immersion process must be performed on the armature assembly after the VPI process. Minimum Volts . . . . . . . . . . . . . . . . . . . . . . . 0.7 Maximum Volts . . . . . . . . . . . . . . . . . . . . . . 12.4 High–Potential Test 1.
Vertical Drilling Motor, Type GE752, GEK–91584D Armature Bearings 13. Assemble the grease tubes to the inner bearing cap: NOTE: Parts that will be shrink–fitted should be heated in an oven and assembled hot. Make sure shrink–fitted parts are tight against adjacent parts after they have cooled. a. On UP1 and AUP1 models, there are two grease tubes, assembled to the inner bearing cap and protrude through a hole in the frame. b.
GEK–91584D, Vertical Drilling Motor, Type GE752 SMEAR 0.50 OZ. OF GREASE ON GREASE SEALS. MODELS SEE TABLE 2, PAGE 20 FIG. 34. DRIVE–END BEARING ASSEMBLY. E–18166E. NOTE: Do not heat the bearing and housing assembly above 100 C (212 F). Higher temperatures may cause the oil to “bleed” from the grease. 58 7. Heat spacer (9) to 110 C (230 F) and shrink it onto the shaft tight against the inner race of ball bearing (3).
Vertical Drilling Motor, Type GE752, GEK–91584D MODELS SEE TABLE 2, PAGE 20 FIG. 35. DRIVE–END BEARING ASSEMBLY. E–39301. The bearing assembly will be completed when the armature is assembled into the frame. 2. If sleeve (13) was removed, heat it to 110 C (230 F) and shrink it tight onto the shaft against the shoulder. 3. When sleeve (13) has cooled, assemble a new seal ring (5) onto the sleeve, oriented as shown in Fig. 40. 4. Pack 5.20 oz.
GEK–91584D, Vertical Drilling Motor, Type GE752 14 ASSEMBLED TO EITHER P13 OR P17, DEPENDING ON MODEL. 13 NOT INCLUDED ON ALL MODELS 12 NOT INCLUDED ON ALL MODELS 16,21 APPLY P15 TO THREADS AT BOTH ENDS OF P12 19 17 18 2 2 NOT INCLUDED ON ALL MODELS 24 20 USE IF NECESSARY TO ADJUST FOR PROPER ASSEMBLY OF PARTS 17, 18 AND 19 4,5 23 3 22 FILL BEARING COMPLETELY WITH 29 OZ. OF P7 USE 4.8 OZ. OF P7 IN EACH CAVITY 6 SMEAR .5 OZ. OF P7 ON SEALS REF. 1 2 3 4 5 6 7 12 13 14 TORQUE TO 110–120 FT. LBS.
Vertical Drilling Motor, Type GE752, GEK–91584D 5. 6. 7. Heat bearing housing (2) in an oven to 100 C (212 F). While hot, assemble nilos ring (4) (oriented as shown in Fig. 40), and the ball bearing (3) into the housing firmly against the shoulder at the bottom of the bearing fit. Fill all voids in the ball bearing completely with approximately 20.8 oz. of grease. Smear 0.5 oz. of grease on the bearing housing and bearing cap seals, and on the seal ring wear surface on the nilos ring (4).
GEK–91584D, Vertical Drilling Motor, Type GE752 MODELS SEE TABLE 2, PAGE 20 FIG. 38. COMMUTATOR–END BEARING ASSEMBLY (41B532745 CHG. F). E–39090A. 8. Install framehead bolts (10) and lockwashers (12). Torque to 440–495 lb.–ft. CAUTION: Alternate tightening of commutator–end bearing housing and drive–end framehead bolts. Uneven tightening of bolts could damage bearings or related fitted surfaces.
Vertical Drilling Motor, Type GE752, GEK–91584D REF. 1 2 3 4 5 6 7 8 9 10 11 12 13 DESCRIPTION FRAME HEAD BEARING HOUSING BALL BEARING NILOS RING SEAL RING SPACER SLEEVE BEARING CAP BOLT, 5/8-11 X 2 3/4 N22P33044 LOCKWASHER, N405P47B13 GREASE GASKET SLEEVE 2 4 5 13 1 MODELS US2, UP6, AUT2 AND AUP5 APPLY NALCO RC TO BORE OF P7 AND SHAFT HEAT P7 TO 180 o C. (356 o F) RISE AND ASSEMBLE AS SHOWN REFER TO ASSEMBLY INSTRUCTIONS FOR DETAILS 9,10 8 12 FILL BEARING COMPLETELY WITH 20.8 OZ.
GEK–91584D, Vertical Drilling Motor, Type GE752 17. At the commutator end, smear the seals on bearing cap (4) and sleeve (42) with grease. OUTER BEARING RACE WITH ROLLERS BEARING CAGE FEELERS SHAFT NOTE: Prior to heating sleeve (42), apply NALCO RC* “Rail Conditioner” to the inside diameter of the sleeve and to the mating surface on the shaft. Apply the NALCO with a Scott–150 white paper towel only and allow it to dry to a thin white film on both surfaces before proceeding with Step 18. 18.
Vertical Drilling Motor, Type GE752, GEK–91584D 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). 15. Finish the assembly of grease tube fittings and washer (27) where it passes through the framehead. Tighten all fittings and hardware. 7.
GEK–91584D, Vertical Drilling Motor, Type GE752 3. Attach the brush–shunt terminals to the brushholder body under the screws provided. 4. Inspect the interior of the machine for foreign objects. Install the commutator covers on the motor and check for proper fit and latch operation. 5. Clean the terminals. 7. Generally, the fit will be improved, but the foregoing procedure may have to be repeated several times to obtain a 75 percent fit.
Vertical Drilling Motor, Type GE752, GEK–91584D hub is nearly in engagement with the taper fit (not in actual contact), snap it forcibly into place with a quick push. It is important that the hot hub be instantly snapped into position before it has cooled; otherwise, it will freeze to the shaft and cannot be adjusted further. CAUTION: Zero settings of advance gauge must not be disturbed until all readings on the hub are completed.
GEK–91584D, Vertical Drilling Motor, Type GE752 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 vibration. Vibration should not exceed 0.002 on commutator end. If vibration exceeds this amount, rebalance the armature. 4. Check the commutator for roughness and make sure the brushes are riding properly. 5.
Vertical Drilling Motor, Type GE752, GEK–91584D WARNING: Electric shock can cause serious or fatal injury. To avoid such injury, personnel should take and observe proper precautions during the high–potential testing. REMOVING ARMATURE LOCKING ARRANGEMENT LOCKING THE ARMATURE FOR SHIPMENT (See Fig. 43) 1. Remove two diametrically opposite bolts in the commutator end bearing cap. 2. Install shipping bolts (1) (painted yellow) with jam nuts (2) applied. Torque bolts to 30 lb.–ft.
GEK–91584D, Vertical Drilling Motor, Type GE752 1. Remove all corrosion. 2. Wipe off 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 GE–D6C6A1 slushing compound. curely support and enclose the armature in a totally enclosed wooden box of sufficient strength to protect the it from damage. 1.
Vertical Drilling Motor, Type GE752, GEK–91584D WRAP HEAVY PAPER AROUND COMMUTATOR 2 X 6 X 20–1/2 (8 PIECES) WRAP WATERPROOF PAPER AROUND PUNCHINGS 50–1/2 ALL DIMENSIONS IN INCHES 1 X 6 X 22 (NO HOLE) 9–1/2 3X6 1 X 6 X 22 (2 PIECES) WITH HOLES 2 X 6 X 24 (4 PIECES) 3X6 1 X 6 X 57–1/2 (18 PIECES) 1 X 6 X 22 (18 PIECES) ADJUST THICKNESS OF END BOARD TO SUIT LENGTH OF SHAFT 2 SKIDS – 3 X 6 X 57–1/2 FIG. 46. ARMATURE PLACED IN SHIPPING BOX. E–3783. FIG. 45. BOX FOR SHIPPING ARMATURES. E–3782A. 3.
GEK–91584D, Vertical Drilling Motor, Type GE752 examined for rust. Any rust found should be removed using fine abrasive paper, after the old slushing compound has been removed with mineral spirits (GE–D5B8). Methanol should be used to remove all residue. WARNING: Cleaning solvents may be toxic and/ or inflammable. They can cause serious or fatal injury if used without proper precautions. For safety: 1. Do not inhale solvent fumes. 2. Use solvents only in adequately ventilated areas. 3.
Vertical Drilling Motor, Type GE752, GEK–91584D 3. 4. 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 sufficiently reduced to raise the megger reading to 2 megohms. An electrical source of heat is best for drying as it can be easily regulated and is clean. Proceed as follows: a. Remove the armature from the frame and remove bearings from the armature shaft. b.
GEK–91584D, Vertical Drilling Motor, Type GE752 ONE .25 PIPE PLUG–REPLACE WITH GREASE FITTING FOR REGREASING (ALL MODELS EXCEPT UP1, UP2, AUP1 AND AUP2) 15.09 .50–13 TAP X 1.00 DEEP 8 HOLES 2.25 DIA. (3 HOLES) FOR LIFTING 15.09 AIR OUT (4 CORNERS) + .25 – 16.82 15.53 + .25 – 16.82 +.000 –.010 16.656 F2 F1 .375–24 THD. 1.72 18.00 14.78 +.000 –.010 36.000 VIEW SHOWING HYDRAULIC PUMP OFF FOR HUB BOTH ENDS MODEL UP1 AUP1 ”E” .75–10 THRU ”F” 22.12 .04R ”G” 16.50 .01R UP2, 3 & 4 AUP2, & 3 + .
Vertical Drilling Motor, Type GE752, GEK–91584D ONE .25 PIPE PLUG–REPLACE WITH GREASE FITTING FOR REGREASING (ALL MODELS EXCEPT UP1, UP2, AUP1 AND AUP2) NOTE FOR ARMATURE LOCKING ARRANGEMENT LOCATED ON COMMUTATOR END TO BE IN PLACE DURING MOUNTING OF MOTOR BUT TO BE REMOVED BEFORE OPERATION OF MOTOR G 58.50 9.56 7.88 ARMATURE LOCK ARRANGEMENT SEE NOTE AIR OUT CLARMATURE .50 NPT FOR AIR PRESSURE MEASUREMENT + .005 – 11.375 DIA. A1 F2 1.06 1.06 A2 F1 + .06 – 13.43 + .06 – 9.24 1.56 DIA.
GEK–91584D, Vertical Drilling Motor, Type GE752 GREASE VENT TUBE FITTING ”A” SEE TABLE 1 GREASE TUBE FITTING ”B” SEE TABLE 1 2.00 DIA. 4 BOSSES .50 NPT THRU 2 HOLES GREASE TUBE FITTING ”C” SEE TABLE 1 FURNISHED ON MODELS SHOWN IN TABLE 1 FURNISHED ON MODELS SHOWN IN TABLE 1 .562 DIA. THRU 2 HOLES H H 1.25 TAPER IN DIA. PER FOOT IN LENGTH (BOTH ENDS) + .005 – 11.375 DIA. 13.50 3.125–8 NS–2A THREADS (BOTH ENDS) AIR INLET FURNISHED ON MODELS SHOWN IN TABLE 1 .390 DIA. DRILL THRU .578 DIA.
Vertical Drilling Motor, Type GE752, GEK–91584D MINIMUM REQUIRED TO REMOVE COVER AIR INLET FLANGE TOP INSPECTION COVER B 21.00 2.50 .50 NPT 2 HOLES REF. A1 1.00 A2 .56 F 1.12 1.00–8 UNC–2B THREAD X 1.50 DEEP 8 HOLES EQ. SPACED ON 25.00 DIA. B.C. A BOTTOM INSPECTION COVER .562 DIA. 2 HOLES REF. .812 DIA. X 1.94 DEEP 8 HOLES EQ. SPACED ON 25.00 DIA. B.C. COMMUTATOR END .687 DIA. IN 1325/24 CABLES EXTENDING 10 FEET FROM FRAME 1.12 8.00 11.00 3.25 10.25 8.
GEK–91584D, Vertical Drilling Motor, Type GE752 .25 NPT FOR REGREASING 2.25 DIA. (3 HOLES) FOR LIFTING AIR OUT (4 CORNERS) + .25 – 16.82 15.53 AIR OUT .50–13 TAP 1.00 DEEP (8HOLES) IMPORTANT: THE ELECTRICAL EQUIPMENT SHOULD BE LOCATED IN A SPACE WHICH– (1) PROVIDES SUFFICIENT ACCESSIBILITY FOR BRUSH INSPECTION. (2) ALLOWS REMOVAL OF ALL THE BRUSHES AND PIGTAIL FASTENERS. (3) ALLOWS MAINTENANCE PERSONNEL TO COMPLY TO THE GE MAINTENANCE INSTRUCTION SPECIAL REQUIREMENTS + .000 – .010 16.
Vertical Drilling Motor, Type GE752, GEK–91584D 58.50 ”D” AIR OUT 7.88 6.37 .25 NPT 2 INTERCONNECTED HOLES 8.55 + – .005 11.375 DIA. 1.06 A1 1.06 4.63 5.69 F2 A2 F1 4.89 13.44 + .078 – .059 0.05 4.25 ARMATURE LOCK ARRANGEMENT SEE NOTE 5.25 1/2 NPT (2 HOLES) FOR PRESSURE TAPS 1.38 1.74 10.50 23.12 16.500 6.50 8.25 NOTE FOR ARMATURE LOCKING ARRANGEMENT LOCATED ON COMMUTATOR END: TO BE IN PLACE DURING MOUNTING OF MOTOR BUT TO BE REMOVED BEFORE OPERATION OF MOTOR. 22.120 + .12 – 2.38 1.
GEK–91584D, Vertical Drilling Motor, Type GE752 D .562 DIA. THRU (2 HOLES) 1.25 TAPER IN DIA. PER FT. IN LENGTH (BOTH ENDS) D +.005 – 11.375 13.50 3.125–8 NS–2A THREADS (BOTH ENDS) 5.31 AIR INLET 0.656 DIA. DRILL X 2.12 DEEP 0.750–10 TAP X 1.50 DEEP 4 HOLES AS SHOWN .390 DIA. DRILL THRU .578 DIA. DRILL X 1.50 DEEP 1.25 DIA. C’BORE X .20 DEEP .4375–20 TAP THRU AND .375 NPT VIEW AT ”D” AIR INLET FLANGE .50–13 TAP 1.00 DEEP (6 HOLES) 9.50 TOP INSPECTION COVER .20 ”C” 1.50 .
Vertical Drilling Motor, Type GE752, GEK–91584D 81
GEK–91584D, Vertical Drilling Motor, Type GE752 GE Transportation Systems NEW 5–90, WLF REVISED 10–90, WLF REVISED 8–92, WLF REVISED 11–93, WLF REVISED 02–05, NBS 82 2901 East Lake Road Erie, Pennsylvania 16531 PRINTED IN U.S.A.