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 TM 55-1905-220-14-5
3-97.1. CRANKSHAFT BEARINGS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION (Cont)
localized high unit pressures in the center area of the bearing shell will cause pitting of the bearing surface.
Also, damaged bearings may cause bending fatigue and resultant cracks in the crankshaft. Refer to paragraph
Do not replace one main bearing shell alone. If one bearing shell requires replacement, install both new upper
and lower bearing shells. Also, if a new or reground crankshaft is to be used, install all new bearing shells.
5.
Upper
Thrust
Inspect.
If the washers
and
washers
are scored or
lower
(11 and
worn excessive-
thrust
13)
ly or the
washers
crankshaft and
play is excessive,
they must be
replaced. Improper
clutch adjustment can
contribute to
excessive wear
on the thrust
washers. Inspect
the crankshaft
thrust surfaces.
If, after dressing or
regrinding the
thrust surfaces,
new standard
size thrust washers
do not hold the crank-
shaft end play
within the specified
limits, it may
be necessary to
install over-size thrust
washer on one
or both sides
of the rear
main bearing.
3-1703
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