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 TM5-241O-237-34
3-11. CRANKSHAFT BEARINGS - REPLACE (Cont'd)
c. Inspection
(1) Inspect bearings for signs of
excessive wear and other damage.
Replace bearing if:
back of bearing shows that
fretting has taken place.
back of bearing has a
mirror-like (shiny) finish.
This condition is caused by
a loose fit of the bearing
in the bore.
it has scratches in the
bearing surface which do
not disappear after
cleaning.
bearing surface has
material damage such as
cracks or flaking.
there is a hole in the
bearing surface.
bearing shows wear on the
mating face.
bearing oil hole is
distorted.
there are hot spots in
bearing surface.
bearing has damage to the
tab. -
(2) Inspect thrust plates for flange
and bearing surface material
damage. Replace damaged thrust
plates.
(3) Check thickness of thrust plates.
If thickness is less than
0.21500.0015 inches, replace
both thrust plates.
3-53
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