TM 55-1520-240-23-9
11-115
DISASSEMBLE, INSPECT AND REPAIR THRUST, PITCH OR YAW VISCOUS DAMPER
(1025-930 OR 1025-940) (AVIM)
(Continued)
11-115
10.
Remove retaining ring (14) from abutment (5).
Use retaining ring pliers.
11.
Pull abutment (5) outward. Remove abutment
from case (1).
12.
Remove packing (15) from abutment (5).
13.
Remove bearing (16) from abutment (5). Use
arbor press.
14.
Inspect bearing (16) (TM 55-1500-322-24).
Use care inspecting valve stops and
check valves. Damage to stops
or valves can cause component
malfunction.
15.
Inspect rivets (17), valve stops (18), and check
valves (19) for damage. There shall be no
looseness, distortion or cracks. If damaged, do
step 16. If not, go to step 17.
16.
Remove four rivets (17), four valve stops (18),
and four check valves (19) from abutment (5).
INSPECT
17.
Inspect bearing bore (20) of abutment (5). Blend
out damaged areas by burnishing or sanding.
Use crocus cloth (E123). Bore shall be 0.876
inch dia maximum.
18.
Inspect shaft (21). Blend out damaged areas by
burnishing or sanding. Use crocus cloth (E123).
Outside diameter of shaft shall be 0.249 inch
minimum.
19.
Check oil port (22) in shaft (21) is open. Use
lockwire (E234).
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