GE GE752 manual Armature Bearings, Drive±End Bearing Figs. 34, 35, 36 and, Commutator±End Bearing

	Vertical Drilling Motor, Type GE752, GEK±91584D
Armature Bearings	13. Assemble the grease tubes to the inner bearing
	cap:

NOTE: Parts that will be shrink±fitted should be heated in an oven and assembled hot. Make sure shrink±fitted parts are tight against adja- cent parts after they have cooled.

Drive±End Bearing (Figs. 34, 35, 36 and 37)

1.Place the armature in a saddle.

2.If the inner sleeve was removed, heat it to 110￿ C (230￿ F) and shrink it tight on the shaft against the shoulder.

3.Spread 0.5 oz. of grease onto the seals on the inner and outer bearing caps and the inner sleeve.

4.Pack 4.8 oz. of grease in the outer circumference of the inner bearing cap as shown by the shaded area in the bearing cap.

5.Install the inner bearing cap on the sleeve.

6.Heat and install the flinger tight against the sleeve.

7.Heat and install the inner race of the roller bear- ing tight against the flinger.

8.Install the outer race of the bearing in the framehead.

9.Fill the roller bearing completely with 29.0 oz. of grease.

10.Install the gasket onto the inner bearing cap.

11.Install guide pins into the inner bearing cap to guide the framehead into position.

12.Assemble the framehead/bearing assembly onto the shaft, over the guide pins until seated against the bearing cap. Remove the guide pins.

NOTE: Orient the inner bearing cap on UP, AUP, US and AUT models to facilitate grease tube as- sembly.

a.On UP1 and AUP1 models, there are two grease tubes, assembled to the inner bearing cap and protrude through a hole in the frame.

b.On UP2 and AUP2 models, there is one grease tube, assembled to the inner bearing cap and protrudes through a hole in the frame.

c.On all other models, there is one grease tube assembled to the inner bearing cap and pro- trudes through a hole in the framehead.

14.Pack 4.8 oz. of grease in the outer circumference of the outer bearing cap and install the bearing cap to the framehead. Secure the assembly with bolts and lockwashers. Torque to the appropriate value in Table 3, Page 37.

Commutator±End Bearing

(All Models Except US2, UP6, AUT2 and AUP5)

Refer to Fig. 38.

1.Clean and inspect the bearing and the shaft bearing fit. Remove nicks and burrs.

2.If sleeve (16) was removed, heat it to 110￿ C (230￿ F) and shrink it tight onto the shaft against the shoulder.

3.Pack 5.25 oz. grease into the outer circumfer- ence of the cavity of bearing housing (8).

4.Heat bearing housing (8) in an oven to 100￿ C (212￿ F). While hot, assemble ball bearing (3) into the housing firmly against the shoulder at the bottom of the bearing fit.

5.Fill all voids in the ball bearing completely with approximately 20.8 oz. of grease, Fig. 38. Smear 0.5 oz. of grease on the bearing housing and the bearing cap seals.

6.Heat the bearing and housing assembly in an oven to 100￿ C (212￿ F). While hot, assemble it onto the shaft, with the inner race tight against sleeve (16).

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