TM 1-1520-238-23
Change 2
7-359
7.92.
UTILITY HYDRAULIC ACCUMULATOR PISTON PACKING REPLACEMENT (AVIM) – continued
CAUTION
Use extreme care when removing end
cap to prevent it from cocking, or damage
to the barrel bore will occur.
b. Remove piston (6) and end cap (7) from barrel
(2).
(1) Remove sealant from end cap (7) (para
1.47).
(2) Remove lockwire from cap (7).
(3) Push cap (7) thru barrel (2). Remove piston
(6) and cap (7) from barrel (2).
(4) Remove and discard GT ring (8) from piston
(6).
(5) Remove packing (9) and two backup rings
(10) from cap (7). Discard packing (9).
7.92.4. Cleaning
a. Wipe removed and attaching parts. Use cloth
(item 52, App F).
7.92.5. Inspection
a. Check removed and attaching parts for
cracks, dents, nicks, and scratches (para
7.56).
b. Check removed and attaching parts for corro-
sion (para 1.49).
c. Perform penetrant inspection. Inspect the bar-
rel insertion end of manifold, hydraulic fittings on
the manifold, piston, end cap, and both metallic
ends of the barrel inside and out. Use fluorescent
inspection kit (TM 55-1500-335-23).
d. Check barrel inside diameter for 2.7445
0.0005 INCHES maximum. Use caliper.
e. Check piston outside diameter for 2.738
0.001 INCHES minimum. Use caliper set.
f. Check end cap outside diameter for 2.739
0.001 INCHES minimum. Use caliper set.
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