TM 55-1520-240-23-9
11-121
ADJUST VISCOUS DAMPER (1025-940 OR 1025-930) (AVIM)
11-121
INITIAL SETUP
Applicable Configurations:
All
Tools:
Hydraulic Repairers Tool Kit, NSN 5180-00-323-4891
Soft-Jawed Vise
Spanner Wrench, Viscous Damper (T64)
Materials:
Lockwire (E230)
Personnel Required:
Aircraft Pneudraulic Repairer
Inspector
References:
Task 11-119
Equipment Condition:
Off Helicopter Task
1.
Clamp viscous damper (1) in vise (2).
2.
Remove lockwire from two screws (3).
3.
Remove two screws (3) and end cap (4) from
damper (1).
4.
Hold diaphragm (5). Use spanner wrench (T64).
Loosen nut (6).
5.
Hold diaphragm (5). Use spanner wrench (T64).
Turn socket head screw (7) in valve shaft (8)
about 1/8 turn. Turn screw clockwise for less
damping. Turn screw counterclockwise for more
damping.
6.
Remove damper (1) from vise (2).
7.
Perform damper test (Task 11-119).
8.
Hold diaphragm (5). Use spanner wrench (T64).
Tighten nut (6).
INSPECT
9.
Install cap (4), and two screws (3).
11-565