GE GE752 manual Turning, To Change Motor Direction

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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.Grind the commutator and check commutator runout with a dial indicator. The maximum com- mutator runout is 0.001 in.

5.Perform the undercutting, raking and polishing operations.

Turning

If the surface of the commutator is badly worn, burned or scarred, turn the commutator in a lathe as fol- lows:

1.True the shaft centers with respect to the bearing fits by scraping. Place the armature in a lathe and check the concentricity of the bearing fits. The TIR should not exceed 0.001 in.

2.Cover the windings to keep out chips.

3.Set the cutting tool for turning copper, and set lathe speed to give a commutator surface speed of 300 feet per minute. Refer to the DATA section for dust groove dimensions.

4.Make clean, smooth cuts to remove just enough copper to renew the commutator surface. Do not allow the cutting tool to chatter.

5.After turning operations have been completed, check commutator runout with a dial indicator. The maximum runout is 0.001 in.

6.Perform the undercutting, raking and polishing operations.

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Contents Contents Vertical Drilling Motor Type GE752Introduction General DescriptionGEK±91584D, Vertical Drilling Motor, Type GE752 Vertical Drilling Motor, Type GE752, GEK±91584D Model DifferencesContd Model Differences DataData Contd Carbon BrushesPole Bore Diameter measured at center of pole Motors Min Max Motor Ratings Continuous Max. HP Shunt UP Special Tools Equipment Grounding InstructionsGrounding Procedures Fig OverhaulLubrication Grease Tubes and Pipe PlugsCovers, Seals, Latches Inspection MonthlyBrushholders Fig Brushholder Sleeves Brush Spring PressureBrushes CommutatorCreepage Band Flash RingBrushholder Replacement Basic Repairs Brush ReplacementSEMI±ANNUALLY Brushholder Clearance Adjustment InstallationCommutator Resurfacing Sanding Procedure Hand Stoning ProcedureGrinder Installation Fixture GrindingCommutator GRINDER. E±18249 Grinding ±19771AAir Curing Commutator Testing Before DisassemblyBasic Overhaul Disassembly Megohmmeter TestBar±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 Cleaning Steam CleaningVapor Degreasing Anti±Friction Bearings/Shaft Tapers/Bearing FitsBearing Inspection ArmatureArmature Shaft Inspection CommutatorMotor Frame Armature Insulation 41D731545 CHG. F. E±18156A See Note Brushholders Lubrication of BoltsConnection Diagram 493A210 CHG . E±39092B Creepage Band Replacement Rewinding ArmatureRiser Width DiameterProcedure Commutator TighteningHydraulic Press Preferred Method Torque Wrench Acceptable MethodSpin Seasoning Commutator Assembled On Armature Commutator ResurfacingTurning To Change Motor DirectionConnection Diagram 41A330278, CHG . E±38055B Connection Diagram 41A330179, CHG. A. E±37950A Raking ±4270BResistance Measurement Test After Repair Armature High Potential TestUsed Armature Rewound ArmatureReplacement Coil InstallationProcedure 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 Brazing Coil Terminals Gas Torch BrazingTest After Repair Flood Dipping Coiled FrameCoiled Frame Without Armature Balancing Armature ReassemblyVarnish Treatment Armature Armature Bearings Drive±End Bearing Figs , 35, 36Commutator±End Bearing All Models Except US2, UP6, AUT2 and AUP5DRIVE±END Bearing ASSEMBLY. E±18166E DRIVE±END Bearing ASSEMBLY. E±39301 Models US2, UP6, AUT2 and AUP5DRIVE±END Bearing Assembly 41B537821, CHG. B. E±37952B Armature Assembly Into Frame Models UP and AUPCOMMUTATOR±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 Testing Shunt Machines Models 5GE752UP and US Motor OperationVentilated 2300 cfm at 7.6 in. H2O at Commutator Chamber UnventilatedCleaning and Slushing Removing Armature Locking ArrangementLocking the Armature For Shipment ShippingSkidding ProtectionArmatures Preparation of BOXBoxing the Armature Storage Placing Into StorageRemoving from Storage Shipping BOX with Armature Less COVER. E±3784Vertical 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