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 TM 55-1905-220-14-7
3-171.3. CONNECTING ROD - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION (Cont)
cracks or small
isolated cav-
ities on the
bearing surface
during engine
operation.
These are char-
acteristics of,
and are NOT
detrimental to,
this type of
bearing. The
bearings should
not be replaced
for these minor
surface imper-
fections. The
upper bearing
shells, which
carry the load,
will normally
show signs of
distress before
the lower bear-
ing shells do.
2.
Inspect the backs
If such spots
of the bearing shells
are present,
for bright spots
discard the
which indicate they
bearing shells.
have been shifting
in their supports.
3. Measure the thickness
The minimum
of the bearing shells,
thickness of a
using a micrometer
worn standard
and ball attachment.
connecting rod
bearing shell
should not be
less than .1230
inch (.3124 cm)
and, if either
bearing
3-2922
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