TM 55-4920-227-15
1
Screw (4 rqr)
25 Washer (4 rqr)
47 Washer, felt, 3/8 in. id x 1.0
2
Washer (4 rqr)
26 Bearing cap (2 rqr)
in. od x 1.8 in. thk
3
Screw (2 rqr)
27 Screw, cap, hex-hd, 5/8-18 x
48 Extension shaft
4
Bushing retainer nut
2 1/2 in. (4 rqr)
49 Gear, increaser
5
End cover
28 Washer (4 rqr)
50 Locknut
6
Ball bearing
29 Locknut (2 rqr)
51 Key, machine
7
Shaft bushing
30 Lockwasher (2 rqr)
52 Bearing cap
8
Bearing cap
31 Ball bearing (2 rqr)
53 Screw (3 rqr)
9
Screw (3 rqr)
32 Pipe plug, slotted headless,
54 Oil slinger
10
Retaining ring
1/4-18
55 Locknut (special)
11
Spring collar retaining ring
33 Screw (4 rqr)
56 Lockwasher
12
Spring collar
34 Washer (4 rqr)
57 Ball bearing
13
Spring
35 Stud (24 rqr)
58 Driven shaft
14
Spring, collar
36 Generator mounting bracket
59 Key, machine
15
Screw, cap, hex-hd 5/16-8 x
37 Screw, cap, he-hd, 3/8-16 x
60 Bottom cover
2 1/2 in. (3 rqr)
2 3/4 in. (10 rqr)
61 Screw, self-tap, rd-hd, No.
16
Washer (3 rqr)
38 Washer (10 rqr)
12 x 1.2 in. (8 rqr)
17
Ball bearing
39 Dowel pin (2 rqr)
62 Washer (8 rqr)
18
Bearing cap
40 Gearcase
63 Case frame
19
Varibelt
41 Ball bearing (2 rqr)
64 Pipe plug
20
Varidisc (movable assembly)
42 Pinion shaft
65 Pipe plug, sq-hd
21
Spline seal
43 Pinion shaft
66 Screw (4 rqr)
22
Retaining ring
44 Bearing cap (2 rqr)
67 Instruction plate
23
Stationary varidisc
45 Extension bushing
68 Eyebolt (5 rqr)
24
Screw (4 rqr)
46 Oil seal
Figure 20 - Continued.
(13) Support the varidisc end of the driven shaft
movable varidisc (20). Remove the ball
(58) and remove three screws (53) that
bearing (17) from the spring collar (14).
secure the boss. Drive the shaft from the
(18) Remove the spline seal (21), and retainer
ball bearing (57) and remove the shaft from
ring (22) from the driven shaft (58). Remove
the rear of the gearcase (40). Remove the
the four screws (24) and washers (25) from
bearing cap (52) and oil slinger (54) from the
the hub of the stationary varidisc (23 and
threaded end of the shaft.
remove the varidisc from the splined end of
(14) Remove the ball bearing (57) and the two
the driven shaft.
ball bearings (41) from the gearcase.
(15) Compress the spring (13 ) and remove the
Note. To facilitate assembly measure
retaining ring (10) and the spring collar
and note the exact distance from the
retaining ring (11) from the driven shaft (58).
end of the varidisc hub to the end of
(16) Slowly release pressure on the spring collar
the driven shaft.
(12) until the spring (13) is fully extended
and remove the spring collar, spring, and
b. Cleaning, Inspection and Repair.
movable varidisc (20) from the driven shaft
(1) Clean all parts, except the ball bearings, in
(58).
an approved cleaning solvent and dry
thoroughly.
Caution: Use extreme care when
(2) Clean the ball bearings in an approved
cleaning solvent and drip dry. Do not use
releasing spring (13) as the spring
compressed air for drying.
tension exceeds 500 pounds.
(3) Inspect the ball bearings for pitted, s ored,
c
(17) Remove three screws (15), washers (16),
overheated or worn condition. Check the fit
and remove the spring collar (14), and
of the bearings to their respective shafts and
bearing cap (18) from the hub of the
housing bores. Replace if unserviceable.
AGO 6729A
41
