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 TM 55-1905-220-14-7
3-171.1. PISTON - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
REASSEMBLY (Cont)
3. With the cylinder liner
installed in the cylin-
der block, hold the pis-
ton upside down in the
liner and check the
clearance in four places
90(32.22 ) apart.
C
4. Use a feeler gage set
to check the clearance.
The spring scale
attached to the proper
feeler gage is used to
measure the force in
pounds required to
withdraw the feeler
gage.
5. Select a feeler gage
with a thickness that
will require a pull of
six pounds (26.7 N) to
remove. The clearance
will be .001 inch
(0.003 cm) greater
than the thickness
of the gage used,
i.e., a .004 inch
(0.010 cm) feeler
gage will indicate
a clearance of .005
inch (0.013 cm)
when it is withdrawn.
The feeler gage must
be perfectly flat
and free of nicks
and bends.
3-2888
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