TM 5-3820-239-l5
2 5 Brake cylinder cover
Note. This figure applies to both the left-hand
2 6 Brake cylinder gasket
and right-hand traction drive assemblies, which are
2 7 Brake piston
identical except for orientation. Quantities specified
2 8 O-ring
are for one assembly (either left-hand or right-hand
29 Brake shaft setscrew, 1/2-13 x 1 1/4 in.
drive).
30 Jam nut, hex, 1/2-18
1 Magnetic plug, 3/4-16
31 Brake band anchor pin
2 Gasket
32 Bolt, machine, hex-hd, 3/4-10 x 8 l/2 in.
3 Pipe plug, sq-hd, 1/2 in.
3 3 Brake spring washer
4 Nut, heat, 5/8-11 (6)
3 4 Brake spring
5 Washer, lock, 5/8 in. (6)
36 Screw, cap, hex-hd, 1/2-13 x 1 1/4 in. (3)
6 Stud, 5/8-11 x 3 in. (8)
3 6 Washer, lock, 1/2 in. (8)
7 Screw, cap, hex-hd, 1/2-13 x 2 1/2 in. (9)
37 Brake cylinder
8 Nut, hex, 1/2-18 (9)
38 Brake cylinder case gasket
9 Washer, lock, 1/2 in. (9)
10 Propelling air motor
39 Brake band assembly
40 Retaining ring
11 Motor pinion gear spacer
4 1 Motor pinion ball hearing
12 Motor pinion gear
4 2 Drive shaft
13 Motor case gasket (2)
4 3 Retaining ring
14 Casing cover
4 4 Drive shaft ball hearing
15 Retaining ring (2)
4 5 Roll pin
16 Retaining ring (4)
4 6 Clutch lock pin handle
17 Ball bearing (2)
47 Roll pin
18 Planet gear (2)
4 8 Clutch spring cap
19 Internal gear
4 9 Clutch lock pin
20 Setscrew, hex-hd, 1/2-13 x 2 in.
50 Spring
21 Jam nut, hex, 1/2-18
51 Spring washer
2 2 Screw, cap, hex-hd, 5/811 x 2 in. (4)
23 Nut, hex, 5/8-11 (4)
5 2 O-ring
53 Gear housing
24 Washer, lock, 5/8 in. (4)
Note. Pin end crank (87) and valve
pusher to bear on the inner races of
end crank (80) are matched parts and
must not be intermixed. Make sure that
(7) Only if the rotary valve bushing (41)
both pieces have identical identification
was removed, install bushing key
marks.
(42) in valve chest (40). Aline the
Install connecting rod bushing (32)
(2)
slot in the rotary valve bushing with
over crank pin sleeve (81).
the key, and press in the bushing
Install connecting rod rings (33) and
(3)
with the valve chest supported, until
connecting rods (34) so that the rods
the bushing is flush with the outer
fit between the bushing and rings.
(valve chest cover) supported face.
Join the valve end crank (30) with
(4)
Note. If the rotary valve bushing is
pin end crank (37), inserting the tang
carefully insalled, it will not be neces-
on crank pin sleeve (31) in. the crank
sary to ream out the inside diameter.
slot.
(8) Check the fit of rotary valve (24) in
Aline lock pin holes in the crank sec-
(5)
rotary valve bushing (41). If tighter
tions, and drive crank lock pin (29)
than a good running fit, lap the valve
into position from the larger end of
to a proper fit, using a fine grain
the tapered hole. Strike the larger
lapping compound with an abrasive
end of the lock pin to make sure that
that will not break up rapidly. If the
it is seated properly, and install cas-
valve is too tight to lap, ream the
tellated nut (28) securely. Install cot-
bushing to a diameter of 2.375 inches
ter pin (27) and bend the ends over.
and then lap if necessary. Blow out
(6)
all reamer cuttings and wash the
the crank, using a suitable bearing
6-71