DISASSEMBLE, INSPECT AND REPAIR THRUST, PITCH OR YAW VISCOUS DAMPER
(1025-930 OR 1025-940) (AVIM)
This task must be performed in a
clean area. Dirt on parts can cause
General inspection criteria apply
unless otherwise stated (Task 1-92).
The thrust, pitch or yaw viscous
dampers are temperature
Inspection steps cover parts that are
subject to wear.
Install damper case (1) in vise (2).
Remove lockwire from screw (3). Remove screw
and packing (4) from abutment (5).
Remove case (1) from vise (2). Drain damping
fluid through port (6). Use container and cloths
(E120) for spilled fluid.
Install case (1) in vise (2).
Remove lockwire from four screws (7). Remove
screws, cover (8), and end cover (9) from
Do not tear diaphragm; otherwise,
damper will malfunction.
Lift diaphragm (10) outer edge. Remove
diaphragm and valve assembly (11) from
Remove valve (11) from diaphragm (10) and
packing (12) from valve assembly (11).
Inspect diaphragm (10) for damage. There shall
be no cracks, tears, or nicks. Check retainer is
bonded to diaphragm. Gently pull diaphragm at
90º to retainer.
Check vent hole (13) in cover (9) is open.