GE GE752 manual CHECKING INTERNAL CLEARANCE OF BEARING. A-120403, Armature Assembly Into Frame

GEK±91584D, Vertical Drilling Motor, Type GE752

OUTER BEARING

RACE WITH

ROLLERS

BEARING

CAGE

FEELERS

SHAFT

INNER BEARING

RACE

FRAMEHEAD

FIG. 40. CHECKING INTERNAL CLEARANCE OF

BEARING. A-120403.

17.At the commutator end, smear the seals on bear- ing cap (4) and sleeve (42) with grease.

NOTE: Prior to heating sleeve (42), apply NAL- CO RC* ªRail Conditionerº to the inside diame- ter 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 pro- ceeding with Step 18.

18.Heat sleeve (42) to 180￿ C (356￿ F) rise and shrink it onto the shaft tight against the spacer

19.Assemble the grease tubes to the bearing cap

(4)(UP1 and AUP1 models only). Install pipe plugs in tubes and tube fittings as indicated in Fig. 15.

NOTE: Insure that grease tubes are packed full of grease.

Armature Assembly Into Frame

Models US1, AUT

Refer to Fig. 18.

11.The clearance between the rollers and the inner race should measure between 0.0012 and 0.004 in. Try various gauge thicknesses until clearance can be determined by the feel of the gauge as the gauge is slowly pulled from between the roller and the inner race.

12.Pack 4.8 oz. of grease in the outer circumference of outer bearing cap (5).

13.Install a new gasket (54) and bearing cap (5) with bolts and lockwashers (53).

14.Smear seals on bearing cap (5) and sleeve (47) with grease.

15.Heat sleeve (47) to 110￿ C (230￿ F) rise and shrink it onto the shaft tight against the roller bearing inner race (48).

16.Seal the grease tubes which protrude through the hole in the frame with RTV±108.

1.Assemble the brushholders into the frame. Move them well back from the commutator to avoid in- terference when installing the armature. Fasten and insulate the connections and install outgoing cables.

2.Block and level the frame in a vertical position, commutator±end down, on a heavy duty stand. Be sure there is clearance for the commutator± end shaft extension when the armature is low- ered into the frame.

3.Install three guide studs in the commutator±end bearing housing bolt circle to guide the housing into the framehead fit.

4.Pack 5.25 oz. of grease in the outer circumfer- ence of bearing cap (8).

5.Lift the armature with the hoist and lifting bail at the drive end. Line up the hoist directly over the center of the cavity in the frame.

*Product of NALCO Chemical Co.

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