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 TM 55-1905-220-14-10
5-19.1. CAMSHAFT ASSEMBLY AND GEAR TRAIN - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
b. Inspect the camns and journals for wear or
scoring. If the camns are scored, inspect the
cam followers. Also, inspect the camshaft
keyways and threads for damage.
c. Runout at the center bearing, when Counted on
end bearing surfaces, should not exceed .002"
maximum.
d. Examine both faces of each car shaft rear end
bearing and thrust washer. Also, examine the
surfaces of each camshaft and camshaft gear
which contact the thrust washers. Replace
excessively worn or scored p arts. Camshaft or
camshaft gear thrust surfaces that are not
scratched too severely may be smoothed down
with an oil stone.
NOTE
If a new camshaft is to be installed, steam clean it to remove the
rust preventive and blow out the oil passages with compressed
air.
e. New standard size thrust washers are .120" to
.122" thick. The clearance between the thrust
washer and the thrust shoulder of the camshaft
is .004" to .012" with new parts, or a maximum
of .018" with used parts. Excessive clearance
may be reduced by using thrust washers which
are .005" or .010" oversize.
5-331
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