TM 5-3810-206-35
KEY to fig. 6-3:
1
Bearing, sleeve
8
Bearing, sleeve (2 rqr)
14
Capscrew (2 rqr)
20
Bolt (2 rqr)
2
Sprocket
9
Shaft
15
Gear
21
Cotterpin (4 rqr)
3
Bushing (4 rqr)
10
Nut (2 rqr)
16
Sprocket
22
Pin
4
Fitting (4 rqr)
11
Bearing, sleeve (2 rqr)
17
Shaft
23
Pin (2 rqr)
5
Shaft (2 rqr)
12
Lockwasher (2 rqr)
18
Plate
24
Rod end (2 rqr)
6
Yoke
13
Collar
19
Lockwasher (2 rqr)
25
Nut (4 rqr)
7
Gear and sprocket
Figure 6-3. Crowd and retract mechanism, exploded view.
from left side of boom, removing gear (15) and sprocket
(3) Repair by replacing damaged or defective
(16) as shaft (17) is pulled from them.
parts or mounting hardware.
(8) Press bushings (11) from boom foot.
c. Reassembly and Installation. Reassemble and
(9) Remove fittings (4) from shafts (5), sprocket
install crowd and retract mechanism by reversing
(2), and boom.
procedures in a above.
(10) Remove two bolts (20), lockwasher (19),
keeper plate (18), and pin (9), then drive pin (9) out of
6-5.
Chain Tightener
boom and remove gear and sprocket (7).
(11) Press sleeve bearing (8) out of gear and
a. Removal and Installation.
sprocket (7).
(1) Remove crowd chain (1, fig. 6-5) from
b. Cleaning, Inspection, and Repair.
digging drum sprocket (TM 5-3810-206-12).
(1) Clean all parts and dry thoroughly.
(2) Remove cotterpins (10) and pin (11) from
(2) Inspect pins and shafts for excessive wear,
yoke (15) and revolving frame.
out of round, or other damage. Inspect gears and
(3) Remove two capscrew (9), lockwasher (8),
sprockets for worn. bent, or chipped teeth. Inspect
and lockplate (7) from clevis (14).
mounting hardware for burs or stripped threads.
(4) Remove pin (4) from yoke (15) and clevis
6-4
