Quantcast INSPECTION - TM-55-1905-220-14-40638

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TM 55-1905-220-14-4
3-41. CRANKSHAFT BEARINGS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
4. Upper
a. Bearing
1. Clean.
and
shells
lower
(4 and
2. Inspect for scoring,
The lower bear-
bearing
13),
pitting, flaking,
ing shells,
shells
(5 and
etching, loss of bab-
which carry the
(15)
bitt, and signs of
load, will nor-
overheating.
mally show
signs of dis-
tress before
the upper bear-
ing shells.
However, bab-
bitt plated
develop minute
cracks or small
isolated cavi-
ties on the
bearing surface
during engine
operation.
These are char-
acteristics of
and are not
detrimental to
this type of
bearing. They
should not be
replaced for
these minor
surface imper-
fections since
function of the
bearings is in
no way impaired
and they will
give many addi-
tional hours of
trouble-free
operation.
3-881


 


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