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 TM 55-1905-221-14-3
6-27.1.
PISTON - MAINTENANCE INSTRUCTION ( Continued)
LOCATION/ITEM
ACTION
REMARKS
CLEANING (Cont)
c.
Clean the inside surfaces of
the piston and the oil drain
holes in the piston skirt.
Exercise care to avoid
enlarging the holes while
cleaning them.
INSPECTION
5. Piston
a. If the tin-plate on the piston
and the original grooves in
the piston rings are intact,
it is an indication of very
little wear.
b. Examine the piston for score
marks, cracks, damaged ring
groove lands or indications
of overheating. A piston
with light score marks which
can be cleaned up may be
reused. Any piston that has
been severely scored or over-
heated must be replaced.
Indications of overheating
or burned spots on the piston
may be the result of an
obstruction in the connecting
rod oil passage.
6-426
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