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 TM 55-1905-219-14-4
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)
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)
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
3-836
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