TM 55-1520-240-23-9
11-119
TEST VISCOUS DAMPERS (1025-820, 930 OR 940) (AVIM)
(Continued)
11-119
Use minimum force to turn disk.
Excessive force can damage disk and
timing tripper.
5.
Turn disk (7) fully counterclockwise. Hold disk
with weight (10) in full up position.
6.
Set timer (12) to zero. Turn knob (13).
7.
Release disk (7). Check tripper (14) starts and
stops timer (12). Record indicated time from
timer.
8.
Repeat steps 5, 6, and 7, three times. Add
recorded times and divide total by 3. Result must
be within the following time range:
Viscous Damper
Range
(Seconds)
1025-820
0.94 to 1.04
1025-930
4.5 to 5.1
1025-940
9.5 to 13.5
If result is not within range, adjust damper (Task
11-120 or 11-121).
INSPECT
9.
Remove weight (10) from wire (11).
10.
Remove disk (7) from damper shaft (8).
11.
Remove two bolts (5) and washers (6). Remove
damper (4).
12.
Remove two clamps (3) from base plate (1).
Remove support (1) and timer (12).
FOLLOW-ON MAINTENANCE:
None
END OF TASK
11-562