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 TM 55-1905-220-14-4
3-40.1. PISTON - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
e. Compres-
Install starting with the Use tool J8128.
sion
bottom ring.
rings (5)
CAUTION
To avoid breaking or overstressing the rings, do not spread them any more than
necessary to slip them over the piston.
f. Compres-
Install.
Use tool J8128.
sion
fire
rings
(4)
CAUTION
When installing the top compression (fire) ring, be sure the black oxide or copper
color side (also identified by an oval mark) is toward the top of the piston.
g. Compres-
Stagger ring gaps around
Rotate rings
sion
the piston.
or piston.
rings
(4 and 5)
h. Ring
Install in oil control
Install with
expander
ring groove.
the legs of the
(7)
free ends to-
ward the top of
the piston.
With the free
ends pointing
up, a notice-
able resistance
will be encoun-
tered during
installation
of the piston
3-822
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