TM 9-2320-289-34
6-17.
REAR AXLE DRIVE PINION AND BEARINGS MAINTENANCE (ALL EXCEPT
M1009) (Con’t).
7 .
Clamp drive pinion (9) and retainer (1) assembly in soft-jawed vise. Install flange holder (8).
Install new Iockwasher (4) and new flange nut (3). Tighten flange nut to approximately
350 Ib.-ft. (475 Nom). Remove flange holder.
CAUTION
Ensure that flange nut (3) is tightened in small increments as preload is
being reached. Exceeding torque specifications may compress spacer
(13) on drive pinion (9) too far and require replacement of spacer.
NOTE
Proper preload is reached when torque required to turn drive pinion (9) is
25-35 lb.-in. (3-4 N.m) for new bearings, or 5-15 lb.-in. (1-2 N.m) for
reused bearings.
8 .
Measure turning torque. Continue to tighten flange nut (3) in small increments. Check turning
torque after each slight amount of tightening until proper preload is reached.
6-119
