GE GE752 manual Inspection Monthly, Covers, Seals, Latches, Brushholders Fig

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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 in- spection covers. Use clean, dry compressed air and blow the dirt and carbon dust from the interior of the ma- chine.

WARNING: When using compressed air for clean- ing 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 equip- ment as specified by applicable federal or state safety regulations.

Check exterior covers to be sure felt seals are intact. If seals are missing or covers are damaged, replace seals or covers as necessary. Make sure covers fit prop- erly and cover latches work properly.

Brushholders (Fig. 5)

Satisfactory operation of the drilling motor requires the brushholders to be in good condition. Of particular importance is the inside dimension of the carbonways. Operation may also be impaired by brushholders which have been mechanically damaged or sustained dam- age as the result of motor flashovers.

Inspect the brushholders for damage. If they require replacement, refer to BASIC REPAIRS, Brushholder Replacement section for instructions.

When new, brushholder carbonways should mea- sure 0.753 +/±0.002 in x 2.2575 +/±0.0025 in. If or when the 0.753 in. dimension exceeds 0.765 in., the brushhol- der should be scrapped. If it falls between 0.758 and 0.765 in., the carbonway can be restored to its proper dimension according to the following instructions:

1.Remove the brushholder. Position it as shown in Fig. 3 and tap the metal ridge with a hammer.

FIG. 3. RESIZING BRUSHHOLDER

CARBONWAYS. E±11281.

Start at one end and work along the ridge to the other end.

2.Check progress frequently by means of a ªGo/ No±Goº gage made to the dimensions shown in Fig. 4.

FIG. 4. BRUSHHOLDER CARBONWAY

GAGE. E±11283A.

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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 InstructionsLubrication Grounding Procedures FigOverhaul Grease Tubes and Pipe PlugsCovers, Seals, Latches Inspection MonthlyBrushholders Fig Brushholder Sleeves Brush Spring PressureCreepage Band BrushesCommutator 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 Bar±To±Bar Resistance Test DisassemblyMegohmmeter 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 CleaningBearing Inspection Vapor DegreasingAnti±Friction Bearings/Shaft Tapers/Bearing Fits ArmatureArmature Shaft Inspection CommutatorMotor Frame Armature Insulation 41D731545 CHG. F. E±18156A See Note Brushholders Lubrication of BoltsConnection Diagram 493A210 CHG . E±39092B Riser Width Creepage Band ReplacementRewinding Armature DiameterHydraulic Press Preferred Method ProcedureCommutator Tightening 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 ±4270BUsed Armature Resistance MeasurementTest After Repair Armature High Potential Test Rewound ArmatureProcedure for New Coil±Pole Assembly ReplacementCoil Installation 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 Commutator±End Bearing Armature BearingsDrive±End Bearing Figs , 35, 36 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 Ventilated 2300 cfm at 7.6 in. H2O at Commutator Chamber Testing Shunt Machines Models 5GE752UP and USMotor Operation UnventilatedLocking the Armature For Shipment Cleaning and SlushingRemoving Armature Locking Arrangement ShippingArmatures SkiddingProtection 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