GE GE752 manual Data Contd, Carbon Brushes

Page 5

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.) . . . . . . . . . . . . . . . . . . . . . . . . . 1±3/32 (brush is measured on the longest side)

Spring Pressure on Brush, Preset (lb.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10±12

Brushholder

Clearance to Commutator (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/16±3/32

Clamp Bolt Torque (lb.±ft.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225±250

Commutator

Side Mica Thickness (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.060 Slot Depth (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.047 Undercutting Saw:

Width (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.063 Diameter (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.000

Diameter: (in.)

New . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.625 Worn (minimum permissible) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.375 Riser Width (minimum permissible) (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.625

Dust Groove: (in.)

Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.250

Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.125

Commutator (Cont'd)

Concentricity ± New Commutator (in.)

Total Indicated Runout, TIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.001 Variation of Indicator Runout within (in.)

any Group of 20 Bars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0004 Variation of Indicator Reading between (in.)

any Two Adjacent Bars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0001 Concentricity ± Used Commutator (in.)

(Resurface if runout exceeds 0.010 TIR or 0.003 within any group of 6 bars):

After Resurfacing, TIR (in.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.001 Bar±To±Bar Test (500 v) Voltage

Variation Bar±To±Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/± 5%

Armature Balance

 

 

Commutator End

. . . . . . . .

12 grams (0.42 oz.)

Drive End

. . . . . . . .

10 grams (0.35 oz.)

Armature Bearings

Min.

Max.

Diametral Clearance, Assembled (In.)

 

 

Drive End

0.005

0.009

Commutator End

0.0005

0.0035

Runout Measured from Shaft to Outer Race (in.):

 

 

Drive End

. . . . . . . . .

. . . . . . . . . . . 0.004

Commutator End

. . . . . . . . .

. . . . . . . . . . . 0.003

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Contents Vertical Drilling Motor Type GE752 ContentsGEK±91584D, Vertical Drilling Motor, Type GE752 General DescriptionIntroduction 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 PlugsBrushholders Fig Inspection MonthlyCovers, Seals, Latches Brush Spring Pressure Brushholder SleevesCommutator BrushesCreepage Band Flash RingSEMI±ANNUALLY Basic Repairs Brush ReplacementBrushholder Replacement Commutator Resurfacing InstallationBrushholder Clearance Adjustment Hand Stoning Procedure Sanding ProcedureFixture Grinding Grinder InstallationCommutator GRINDER. E±18249 ±19771A GrindingBasic Overhaul Testing Before DisassemblyAir Curing Commutator 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 ArmatureMotor Frame CommutatorArmature Shaft Inspection 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 TerminalsCoiled Frame Without Armature Flood Dipping Coiled FrameTest After Repair Varnish Treatment Armature ReassemblyBalancing 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 Mounting HUB MountingHub Fitting Models 5GE752AUP, AUT Testing After OverhaulTesting Series Machines 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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