TM 55-1520-240-23-4
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INSPECT LOWER DRIVE ARM
(Continued)
5-109
7.
Check axial and radial play in lower drive arm
bearing (3) as follows:
a.
Install bolt (4), eight washers (5), and nut (6)
in bearing (3).
b.
Clamp bolt (4) in bench vise (7).
c.
Clamp dial indicator (8) on drive arm (2).
Position contact point (9) against vise (7).
d.
Try to move arm (2) in horizontal direction.
Check dial indicator (8) for movement.
Movement shall not exceed 0.006 inch.
Make sure bolt (4) does not move in vise (7).
e.
Try to move arm (2) in vertical direction. Use
feeler gage between arm and jaws of vise (7)
to measure movement. Movement shall not
exceed 0.003 inch.
f.
Remove arm (2) and bolt (4) from vise (7).
g.
Remove bolt (4), washers (5), and nut (6)
from arm (2).
FOLLOW-ON MAINTENANCE:
None
END OF TASK
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