TM 5-1940-277-34
MAIN BEARING INSPECTION AND REPLACEMENT INSTRUCTIONS
(Continued)
LOCATION
ITEM
ACTION
REMARKS
4.
Crankshaft (11)
Crankshaft main
Measure diameter
Use micrometer
bearing journals
of journals.
caliper, outside.
(16)
5.
Cylinder block
a.
Main bearings
a.
Determine
(1)
(12,13,14,15)
crankshaft to
bearing liner
clearance
(diameter of
step 2c minus
diameter of
step 3).
b.
Replace all
main bearings
if clearance is
out of limits.
Specification:
0.002 to 0.0041
in. (0.051 to
0.104 mm).
b. 7 main bear-
Remove.
Use 5/8 in socket
ing caps
and ratchet.
(6,7,8,9)
and 14 bolts
(10)
3-53
