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 TM 55-1905-219-14-4
3-40.1. PISTON-MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
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 180from
the gap in the
expander. Then
install the
lower half with
the gap 45
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.
3-838
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