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 TM 55-1905-220-14-7
3-171.2. CONNECTING ROD - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
ASSEMBLY (Cont)
h. Piston
One important function
and
of the piston pin re-
connecting
tainer is to prevent
rod
the oil, which cools
assembled
the underside of the
piston and lubricates
the piston pin bushings,
from reaching the cyl-
linder walls. Check the
retainers for proper
sealing as follows:
1. Place the piston
and connecting
rod assembly upside
down on a bench.
2. Pour clean fuel oil
into the piston to
a level above the
piston pin bosses.
3. Dry the external
surfaces of the
piston in the area
around the retainers
and allow the fuel
oil to set for about
fifteen minutes.
4. Check for seepage
of fuel oil around
the retainers. If
the fuel oil leaks
around the retainers,
install new retainers.
In extreme cases it
may be necessary to
replace the piston.
3-2916
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