TM 55-1520-240-23-4
5-99.2
CHECK DRIVE COLLAR AND DRIVE ARM RADIAL PLAY
(Continued)
5-99.2
NOTE
Procedure is same to check forward
or aft drive collar and drive arm for
radial play.
1.
Clamp dial indicator (1) to drive arm collar (2).
2.
Position indicator (1) on lug (3) of upper drive
arm (4), aligned with bolt (4.1). Preload indicator
against lug.
3.
Pull upper drive arm (4) and collar (2) toward
indicator (1). Record indicator reading X.
4.
Hold collar (2) down and push upper drive arm
(4) away from indicator (1). Record indicator
reading Y.
5.
Subtract reading Y from reading X. Result shall
not be more than 0.010 inch.
6.
Remove indicator (1) from drive arm collar (2).
7.
Clamp indicator (1) to upper drive arm (4).
8.
Position indicator on lower drive arm (5), aligned
with bolt (6). Preload indicator against lower
drive arm.
9.
Pull upper drive arm (4) and lower drive arm (5)
away from indicator (1). Record indicator reading
A.
10.
Hold upper drive arm (4) down and push upper
drive arm (5) toward indicator (1). Record
reading B.
11.
Subtract reading A from reading B. Result shall
not be more than 0.010 inch.
12.
Remove indicator (1) from upper drive arm (4).
5-606
