TM 5-1940-277-34
MAIN BEARING INSPECTION AND REPLACEMENT INSTRUCTIONS
(Continued)
LOCATION
ITEM
ACTION
REMARKS
d. Main bearing
Remove.
Use 7/8 in socket
caps (6,7,8,
and 1/2 in drive
9), 14 bolts
ratchet.
(10) and lower
bearing halves
(12,13)
e. Crankshaft
Remove.
(11)
f. Upper bearing
Remove from
halves (14,15)
block (1).
INSPECTION:
2.
Main bearings
a.
Inspect for
(12,13,14,15)
scoring or
grooving.
b.
Replace if
scored or
grooved.
3. Cylinder block
Main bearing
a.
Reinstall after
(1)
caps (6,7,8,9),
crankshaft
main bearing
removal.
halves (12,13,
14,15) and 14
bolts (10)
b.
Torque bolts
Use 5/8 in socket
to 115 - 120
and torque wrench
ft-lb (15.89
(0 - 175 ft-lb).
to 16.58
kfgm).
c.
Measure
Use micrometer
inside dia-
caliper, inside.
meter of each
set of main
bearings.
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