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 TM5-241O-237-34
3-11.
CRANKSHAFT BEARINGS - REPLACE (Cont'd)
(13) Remove plastigage and measure for
(17) Perform cleaning and inspection
procedure outlined on pages 3-52
new bearings; the main bearing
clearance must be 0.0030 to
through 3-55 for main bearings 2,
0.0065 inches. Maximum possible
4, and 6. Disregard STEPS 3 and
clearance with used bearings is
4.
0.010 inches. Replace the upper
and the lower bearing halves if
(18) Install main bearings 2, 4, and 6
measurement is less than 0.010
as described above in STEPS 1
inches. Line bore bearing cap if
through 4, and 8 through 15.
new bearing clearance is under
the specified measurements.
(19) Check crankshaft end play with a
dial indicator. End play is
CAUTION
controlled by the thrust plates
on the No. 7 main bearing.
Be sure cylinder block bearing
bores and backsides of
(20) End play with new thrust plates
bearings are clean and dry.
must be 0.0025 to 0.0145 inches.
Oil on these areas could
cause less heat transfer
(21) Maximum permissible end play with
between the bearings and the
used thrust plates is 0.025
block which, in turn, could
inches. Replace both thrust
cause overheated bearings.
plates if measurement is more
than 0.025 inches.
(14) Put clean lubricating oil on
upper and lower bearing halves
(22) Install engine oil pan plate.
inside surfaces.
See page 3-119.
(15) Perform STEPS 10 and 11 above
(23) Install engine lube oil pump.
for the other bearing caps.
See page 3-111.
(16) See page 3-51 and use the same
e. Place In Service
removal procedures for main
bearings 2, 4, and 6. DO NOT
Run engine and check for proper
REMOVE bearing caps for 1, 3, 5,
operation.
and 7 bearings, and disregard
STEP 2 for thrust plates removal.
3-58
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