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 TM 55-1905-220-14-7
3-171.1. PISTON - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cons)
b. Piston
1. Each piston is fit-
ring
ted with a fire ring,
fitting
three compression
rings and two oil
control rings.
2. The top compression
(fire) ring can be
identified by the
bright chrome on the
bottom side and black
oxide or copper color
on the top. The pre-
stressed fire ring is
further identified by
an oval mark.
3-2890
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