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 TM 55-1905-220-14-7
3-172.1. CRANSHAFT BEARINGS - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION (Cont)
washer on one
or both sides
of the rear
main bearing.
A new standard
size thrust
washer is .1190
to .1220 inch
(0.3023 to
0.3099 cm)
thick. Thrust
washers are
available in
.005 and .010
inch (0.0127
and 0.0254 cm)
oversize.
INSTALLATION
6. Upper
Upper
a. Clean.
bearing
bearing
numbers
shells
b. Lubricate.
Use clean en-
1, 2, 3
(4)
gine oil.
NOTE
The upper and lower main bearing shells are not alike: the upper
bearing shell is grooved and drilled for lubrication - the lower
bearing shell is not. Be sure to install the grooved and drilled
bearing shells in the cylinder block and the plain bearing shells
in the bearing caps. Otherwise, the oil flow to the bearings and
to the upper end of the connecting rods will be blocked off. Used
bearing shells must be reinstalled on the same journal from
which they were removed.
c. Install.
Start the plain
end of bearing
shell around
the crankshaft
journal so that
when the bear-
3-2958
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