TM 55-1520-240-23-9
11-144
TEST PITCH, ROLL OR YAW SPRING ASSEMBLY (AVIM)
(Continued)
11-144
Do not lubricate any parts of spring
assembly, except as noted; otherwise,
component malfunction can occur.
1.
Clamp bearing end (1) of spring assembly
housing (2) in vise (3).
2.
Install bolt (4) and nut (5) loosely in rod (6).
3.
Hook dial indicating scale (7) on bolt (4) between
lugs (8) of rod (6).
4.
Align scale (7) with rod (6). Pull scale and
measure force as rod just starts to move. Force
must be as follows:
PITCH
Spring
Assembly
ROLL
Spring
Assembly
YAW
Spring
Assembly
7.38
3.37
15.3
to
to
to
9.02
4.13
18.7
pounds
pounds
pounds
If force is correct, go to step 9. If force is more or
less, perform steps 5, 6, 7, and 8.
5.
Repeat step 4, pushing scale (7).
INSPECT
6.
Remove scale (7), nut (5), and bolt (4) from rod
(6).
7.
Adjust spring assembly (Task 11-145).
8.
Repeat steps 1 thru 4.
INSPECT
9.
Remove scale (7), nut (5), and bolt (4) from rod
(6).
10.
Remove housing (2) from vise (3).
FOLLOW-ON MAINTENANCE:
None
END OF TASK
11-614
