TM 5-3820-239-15
81 Spacer plate gasket
100 Screw, cap, hex-hd, 1/2-18 x 1 1/4 in. (8)
82 Spacer housing sleeve
101 Screw, dowel, cap, hex-hd, 1/2-18 x 1 3/8 in. (3)
83 Inner support bracket shim (2)
102 Washer, lock, 1/2 in. (11)
Oil level plug
84
103 Cover gasket
104 Dust shield
85 Magnetic drain plugwr, 1/2 in.
86 Gasket
105 Large oil seal
87 Oil filler plug
106 Cover plate assembly
88 Sprocket stud nut (10)
107 Complete outer bearing
89 Collet (10)
108 Complete inner bearing
90 Sprocket assembly
109 Main drive shaft pinion
Shaft trunnion
91
110 Shaft and spacer housing (lh shown rh opposite)
9 2 Track sprocket bearing shim (as rqr)
111 Oil seal wear plate
93 Screw, cap, hex-hd, 3/8-16 x 1 1/4 in. (2)
112 Small oil seal
94 Screw, cap, hex-hd, 3/8-24 x 1 in. (2)
113 Oil seal retainer
95 Nut, hex, 3/8-24
114 Complete outer ring gear bearing
96 Washer, lock, 3/8 in. (6)
115 Complete inner ring gear bearing
97 Stud, 3/8-24 x 15/16 in.
116 Track sprocket stud (10)
98 Bearing retainer
117 Ring gear and hub assembly
99 Bearing retaining shim (as rqr)
Figure 6-31(3)-Continued.
and spacer housing (110). Install the
cedures:
assembled small oil seal (112) and
oil seal retainer (113) on the shaft.
b. Find Drive Assembly.
(1) Press large oil seal (106, fig. 6-31),
Install shaft trunnion (91) and se-
into cover plate assembly (106), with
cure with nut (36).
the lip facing outward.
Note. If the shim thickness used pre
(2) Press small oil seal (112) into the
viously cannot be determined, start with
deep bore of oil seal retainer (113),
0.125 inch thickness of shims.
with the lip facing the shallow bore
Engage the hook of a spring scale in
(9)
of the retainer.
a tooth of ring gear and hub assem-
(3) Tap or press the outer races of outer
bly (117) as shown in figure 6-32
and inner ring gear bearings (114
and check the pull against rotation of
and 116) into the hub of ring gear
the gear. If the spring scale does not
and hub assembly (117).
read between 6 to 8 pounds, add or
(4) Tap or press the outer race of inner
remove track sprocket bearing shims
bearing (108) into the bore of shaft
(92, fig. 6-31) as required to obtain
and spacer housing (110).
the correct reading.
(5) Using a suitable press and bearing
Carefully install oil seal wear plate
(10)
pusher to bear on the inner races,
(111) on the rim of ring gear and
install bearings (107 and 108) on
hub assembly (117), tapping the
main drive shaft pinion (109).
plate in place with a piece of wood.
(6) Tap or press the inner race and rollers
Be careful not to damage the plate.
of outer and inner ring gear bearings
Install the assembled main drive
(11)
(114 and 116) in place on shaft and
shaft pinion (109) with bearings
spacer housing (110).
(107 and 108), into shaft and spacer
(7) Install ring gear and hub assembly
housing (110).
(117) into shaft and spacer housing
(110).
Align a new cover gasket (103) with
(12)
(8) To check ring gear adjustment, in-
shaft and spacer housing (110). In-
stall the same thickness of track
stall cover plate assembly (106) care-
sprocket bearing shims (92) as was
fully over ring gear and hub assem-
removed during disassembly, on shaft
bly (117) onto the shaft and spacer
6-87
