TM 5-3895-373-34
2.70
REPAIR SCREED LIFT CYLINDER - Continued.
C.
INSPECT- Continued.
2.
INSPECT PISTON ROD.
a.
Run your finger along piston rod (3),
surface E. Feel for any scratches or sharp
edges
that
may
damage
preformed
packings and seals. Inspect surface of
piston rod for scratches, pits, or wear that
expose base metal through chrome plating.
b.
Remove sharp edges of nicks or scratches
using crocus cloth.
c.
Replace piston rod if scratches or pits can
not be polished out, if scratch exceeds 0.5
in. (12,7 mm) in length, or if base metal is
exposed through chrome plating.
d.
Visually inspect packing groove F and feel
for nicks and sharp edges. Remove sharp
edges using crocus cloth. If packing
groove edge is cracked or chipped replace
piston rod.
e.
Inspect threads G. If threads are distorted,
replace piston rod.
3.
INSPECT CYLINDER HEAD.
a.
Visually inspect cylinder head (1) retaining
ring groove H, preformed packing groove I,
ring wiper groove J, and compression cup
groove K. Check for any raised edges, or
nicks that may damage packings or seals.
Remove raised edges and nicks with
crocus cloth.
b.
Replace cylinder head if raised edges or
nicks cannot be polished out.
c.
Inspect bore surface L, for nicks, pits, or
scratches. Remove nicks, pits, or scratches
of less than 0.5 in. (12,7 mm) in length with
crocus cloth.
d.
Replace cylinder head if nicks, pits, or
scratches cannot be polished out of bore
surface L.
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