GE VERTICAL DRILLING MOTOR GE752 - Manual (Page 62)

GEK–91584D, Vertical Drilling Motor, Type GE752
62
FIG. 38. COMMUTATOR–END BEARING ASSEMBLY (41B532745 CHG. F). E–39090A.
MODELS
SEE TABLE 2, PAGE 20
8. Install framehead bolts (10) and lockwashers
(12). Torque to 440–495 lb.–ft.
CAUTION: Alternate tightening of commu-
tator–end bearing housing and drive–end
framehead bolts. Uneven tightening of bolts
could damage bearings or related fitted sur-
faces.
NOTE: Be sure framehead bolt holes are
aligned with bolt holes in inner bearing cap be-
fore assembling bolts (10) and lockwashers
(12).
9. Install grease tubes at the drive end:
a. On UP1 and AUP1 models, two grease tubes
are required. Clean all residual sealing RTV
from the grease tube clearance hole in the
frame. Then, reach into the cavity of the ma-
chine, around the drive–end inner bearing
cap (51), and install these tubes to the bear-
ing cap so that they protrude through a hole in
the frame. Seal around the grease tubes at
their hole in the frame with RTV.
b. On UP2 and AUP2 models, one grease tube
is required. The procedure is the same as in-
dicated in Step 9a.
c. On all other models, one grease tube is re-
quired. This tube connects the inner bearing
cap with the framehead, and should have
been assembled with the drive–end bearing
assembly.
NOTE: Insure that all grease tubes are packed
full of grease.
10. Use a feeler gauge and check the radial clear-
ance on the drive–end bearing between each
bearing roller and the inner race, at the top of the
bearing, Fig. 40. Place the feeler gauge between
the top roller and the inner race.