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 TM 55-1905-220-14-4
3-40.1. PISTON - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
CAUTION
When installing the oil control rings, use care to prevent overlapping the ends of
the ring expanders. An overlapped expander will cause the oil ring to protrude
beyond allowable limits and will result in breakage when the piston is inserted in
the ring compressor during installation in the cylinder liner. Do not cut or grind the
ends of the expanders to prevent overlapping. Cutting or grinding the ends will
decrease the expanding force on the oil control rings and result in high lubricating
oil consumption.
i. Oil
Install the upper and
Install by hand
control
lower halves.
Do not use tool.
rings
Install upper
(8)
half with the
gap 1800 from
the gap in the
expander. Then
install the
lower half with
the gap 450
from the gap in
the upper half
of the ring.
Make sure the
scraper edges
are facing down
(toward bottom
of the piston).
NOTE
The face of the top half of the upper oil control ring used on V-71N engines is
chrome-plated.
3-824
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