GE GE752 manual Creepage Band Replacement, Rewinding Armature, Riser Width, Diameter

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Vertical Drilling Motor, Type GE752, GEK±91584D

ARMATURE

Creepage Band Replacement

TABLE 3

STANDARD BOLT TORQUE VALUES

(For Lubricated Bolts)

Because of its superior adhesion qualities, the Teflon creepage band on the outer end of the commutator should be applied using the ªhot bondº process. A copy of this process is included in each Teflon Band Kit, Part No. 76518, which can be ordered from the following ad- dress:

General Electric Company

Insulating Materials Product Section

One Campbell Road

Schenectady, NY 12345

Attn: Customer Service

NOTE: The Teflon band is not included in the kit, but can be ordered through normal Renewal Parts channels.

Inspect the Band

1.There should be no gaps at the joint or between the edge of the Teflon band and the copper bars.

2.The band surface must be smooth, free of var- nish and bonded to the underlay material. There must not be any bubbles under the Teflon or buckling of the band.

3.The surface must be free of damage including scratches and cuts.

Rewinding Armature

The armature must be rewound if any coils are shorted or grounded.

Riser Width

During the rewinding procedure, the TIG welds on the commutator risers are machined to break the arma- ture coil connections. Machining reduces the width of the risers 1/32 to 1/16 in. each time, which in turn de- creases the current±carrying capacity of the risers.

If the calculated width of the risers (after machining) will be less than the Minimum Permissible Riser Width listed in the DATA section, a new commutator must be installed before new armature coils are assembled.

USE THE TORQUE VALUES IN THIS TABLE AS A GUIDE TO IN- SURE SATISFACTORY TIGHTENING OF BOLTS AND NUTS WHERE A SPECIFIC VALUE IS NOT GIVEN IN THE INSTRUC- TIONS.

*INCLUDES SOCKET HEAD SCREWS.

 

 

 

TORQUE VALUES (LB./FT.)

 

 

 

MEDIUM CARBON

ALLOY STEEL

 

 

 

(SAE GRADE 5)

(SAE GRADE 8)*

 

BOLT

THREADS

 

 

 

 

PER

 

 

 

 

DIAM.

INCH

 

 

 

 

 

 

 

 

 

1/4

20

5±8

10±12

 

 

 

28

5±8

10±12

 

 

 

 

 

 

 

5/16

18

12±15

18±21

 

 

 

24

12±15

20±23

 

 

 

 

 

 

 

3/8

16

20±25

30±36

 

 

 

24

25±28

34±40

 

 

 

 

 

 

 

7/16

14

35±40

50±56

 

 

 

20

40±45

60±65

 

 

 

 

 

 

1/2

13

55±60

80±90

 

 

 

20

60±70

95±105

 

 

 

 

 

 

9/16

12

75±80

110±123

 

 

 

18

90±100

130±145

 

5/8

11

105±115

152±169

 

 

 

18

125±140

185±205

 

 

 

 

 

 

 

3/4

10

185±205

285±315

 

 

 

16

220±245

340±370

 

 

 

 

 

 

7/8

9

300±330

440±490

 

 

 

14

340±380

510±565

 

1

8

440±490

685±735

 

 

 

12

530±570

790±8665

 

1±1/8

7

620±690

935±1040

 

 

 

12

750±830

1115±1240

 

1±1/4

7

890±990

1250±1360

 

 

 

12

1040±1160

1600±1750

 

 

 

 

 

 

1±3/8

6

1160±1290

1745±1940

 

 

 

12

1420±1580

2125±2360

 

1±1/2

6

1570±1740

2300±2600

 

 

 

12

1800±2000

2600±3020

 

 

 

 

 

E±38274

Diameter

Refer to the DATA section for the Minimum Permissi- ble Commutator Diameter dimension. If the commutator brush±surface diameter will be less than the minimum permissible diameter after resurfacing operations are performed, replace the commutator before the new ar- mature coils are assembled.

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Contents Vertical Drilling Motor Type GE752 ContentsIntroduction General DescriptionGEK±91584D, Vertical Drilling Motor, Type GE752 Model Differences Vertical Drilling Motor, Type GE752, GEK±91584DData Contd Model DifferencesCarbon Brushes Data ContdPole Bore Diameter measured at center of pole Motors Min Max Motor Ratings Continuous Max. HP Shunt UP Grounding Instructions Special Tools EquipmentOverhaul Grounding Procedures FigLubrication Grease Tubes and Pipe PlugsCovers, Seals, Latches Inspection MonthlyBrushholders Fig Brush Spring Pressure Brushholder SleevesCommutator BrushesCreepage Band Flash RingBrushholder Replacement Basic Repairs Brush ReplacementSEMI±ANNUALLY Brushholder Clearance Adjustment InstallationCommutator Resurfacing Hand Stoning Procedure Sanding ProcedureFixture Grinding Grinder InstallationCommutator GRINDER. E±18249 ±19771A GrindingAir Curing Commutator Testing Before DisassemblyBasic Overhaul Megohmmeter Test DisassemblyBar±To±Bar Resistance Test Armature Removal From FrameCOMMUTATOR±END Bearing Pilot Longitudinal D732922 CHG. N. E±28621D Models See , Description Puller Tools 41D731569 CHG . E±14383C Puller TOOLS. E±18155A Models US1, AUT Longitudinal D735357, CHG. A. E±37949B Models See Table Steam Cleaning CleaningAnti±Friction Bearings/Shaft Tapers/Bearing Fits Vapor DegreasingBearing Inspection ArmatureArmature Shaft Inspection CommutatorMotor Frame Armature Insulation 41D731545 CHG. F. E±18156A See Note Lubrication of Bolts BrushholdersConnection Diagram 493A210 CHG . E±39092B Rewinding Armature Creepage Band ReplacementRiser Width DiameterCommutator Tightening ProcedureHydraulic Press Preferred Method Torque Wrench Acceptable MethodCommutator Resurfacing Spin Seasoning Commutator Assembled On ArmatureTo Change Motor Direction TurningConnection Diagram 41A330278, CHG . E±38055B Connection Diagram 41A330179, CHG. A. E±37950A ±4270B RakingTest After Repair Armature High Potential Test Resistance MeasurementUsed Armature Rewound ArmatureCoil Installation ReplacementProcedure for New Coil±Pole Assembly Motor Frame Field CoilCoiled Frame Assembly 41D732353 CHG. N. E±39094A Models See , Coiled Frame Assembly 41D732345 CHG. V. E±39095A BOX Ground A1 and A2 View AT E Cables with P65 Coiled Frame Assembly 41D735440, CHG. A. E±38056B Description Magnet Frame Coiled Frame Assembly 41D735343, CHG. C. E±37951C Hardened Washer 1 1/4 Gas Torch Brazing Brazing Coil TerminalsTest After Repair Flood Dipping Coiled FrameCoiled Frame Without Armature Balancing Armature ReassemblyVarnish Treatment Armature Drive±End Bearing Figs , 35, 36 Armature BearingsCommutator±End Bearing All Models Except US2, UP6, AUT2 and AUP5DRIVE±END Bearing ASSEMBLY. E±18166E Models US2, UP6, AUT2 and AUP5 DRIVE±END Bearing ASSEMBLY. E±39301DRIVE±END Bearing Assembly 41B537821, CHG. B. E±37952B Models UP and AUP Armature Assembly Into FrameCOMMUTATOR±END Bearing Assembly 41B532745 CHG. F. E±39090A COMMUTATOR-END Bearing Assembly 41B538068 CHG . E-39300 Checking Internal Clearance Brush Installation Hub Fitting HUB MountingHub Mounting Testing Series Machines Testing After OverhaulModels 5GE752AUP, AUT Motor Operation Testing Shunt Machines Models 5GE752UP and USVentilated 2300 cfm at 7.6 in. H2O at Commutator Chamber UnventilatedRemoving Armature Locking Arrangement Cleaning and SlushingLocking the Armature For Shipment ShippingProtection SkiddingArmatures Preparation of BOXStorage Placing Into Storage Boxing the ArmatureShipping BOX with Armature Less COVER. E±3784 Removing from StorageVertical Drilling Motor, Type GE752, GEK±91584D OUTLINE, UP and AUP 41E903631 CHG. H. E±28755B Hole Grease Vent Tube Grease Tube Holes REF OUTLINE, US1, AUT 41E903745, CHG. A. E±37954B ºDº ºBº Vertical Drilling Motor, Type GE752, GEK±91584D GE Transportation Systems
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