TM 5-3805-260-24
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 Ib.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 lb.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 I 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
3-114
