TM 5-3825-226-24
CRANKSHAFT MAIN BEARINGS
7.
Check the bearing clearance with tool (B) as
follows: Put cap (3) in position and install the
bolts. Tighten bolt (5) to a torque of 30 ± 3 lb.
ft. (40 ± 4 N-m). Tighten bolt (4) to a torque of
30 + 3 lb. ft. (40 ± 4 N.m). Put a mark on both
bolt heads and the bearing cap. Tighten bolt (4)
120° ± 5° more. Tighten bolt (5) 120° ± 5°
more.
8.
Remove the bearing cap and measure the
thickness of the wire. The main bearing
clearance must be .002 to .005 in. (0.05 to 0.13
mm). The maximum permissible clearance is
.006 in. (0.15 mm).
9.
Put clean SAE 30 oil on the bolt threads, washer
faces and lower half of the main bearing. Put
the bearing cap and lower half of the main
bearing in position on the engine. Install the
bolts. Tighten bolt (5) to a torque of 30 ± 3 lb.
ft. (40 ± 4 N. m). Tighten bolt (4) to a torque of
30 ± 3 Ib. ft. (40 ± 4 N.m). Put a mark on both
bolt heads and the cap. Tighten bolt (4) 120° ±
5° more. Tighten bolt (5) 120° ± 5° more.
10.
Do Steps 1 through 9 for the remainder of the
bearings.
11.
Check the crankshaft end play with tooling (D).
The end play is controlled by the thrust bearing
on No. 4 main bearing. The end play with new
bearings must be .006 ± .003 in. (0.15 ± 0.08
mm). The maximum permissible end play with
used bearings is .014 in. (0.36 mm). end by:
a) install oil pan
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