TM 5-4320-302-14
6-20. CRANKSHAFT ASSEMBLY (CONT)
Location/Item
Action
Remarks
30. Main bearing
Inspect and replace for excessive wear, over-
bracket
heating, distortion, cracking, high spots, or
other damage.
NOTE
If main bearing bracket is replaced, main bearing support
must also be replaced.
31. Main bearing
Inspect for excessive wear, overheating, distortion,
supports
cracking, or other damage. Measure bearing support
wall thickness, which should not be less than 0.1170
inch (2.973 mm). If measurement is less than tolerance
limit, replace main bearing supports with normal
or oversized wall thickness bearing support.
32. Main bearing
Assemble bearing bracket, clamping bush, washers,
bracket bore
and screws. Make sure matchmarks line up properly
and clamp in vise. Make sure threads and seat areas
are clean. Lightly lubricate them with MIL-L-2104
lubricating oil. Tighten screws alternately and evenly,
in small increments, to 22.13 ft lb (30 N.m) torque.
Using torque gage No. 101910, tighten screws two
additional times in increments of 30 degrees.
6-177
