TM 5-3810-300-24 & P2
be stored for any length of time, they should be treated with a good RUST PREVENTIVE and wrapped in special paper
or other material designed to prevent corrosion.
It is impossible to overstress the importance of careful and thorough inspection of drive unit parts prior to reassembly.
Thorough visual inspection for indications of wear or stress, and the replacement of such parts as are necessary will
eliminate costly and avoidable drive unit failure.
Inspect all bearings, cups and cones, including those not removed from parts of the drive unit, and replace if rollers
or cups are worn, pitted or damaged in any way. Remove parts needing replacement with a suitable puller or in a
press with sleeves. Avoid the use of drifts and hammers. They may easily mutilate or distort component parts.
Inspect hypoid or spiral bevel gears for wear or damage. Gears which are worn, ridged, pitted or scored, should be
replaced. When necessary to replace either the pinion or gear of hypoid set, the entire gear set should be replaced.
Inspect the differential assembly for the following:
A. Pitted, scored or worn thrust surfaces of differential case halves, thrust washers, spider trunnions and differential
gears. Thrust washers must be replaced in sets. The use of a combination of old and new washers will result in
B. Wear or damage to the differential pinion and side gear tooth. Always replace differential pinions and side gear
teeth. Always replace differential pinions and side gears in sets.
Inspect axle shafts for signs of torsional fractures or other indication of impending failure.
Replace all worn or damaged parts. Hex nuts with rounded corners, all lock washers, oil seals and gaskets should
be replaced at the time of overhaul.
Use only genuine Rockwell-Standard replacement parts for satisfactory service. For example, using gaskets of
foreign material generally leads to mechanical trouble due to variations in thickness and the inability of certain
materials to withstand compression, oil, etc.
Remove nicks, mars and burrs from machined or ground surfaces. Threads must be clean and free to obtain
accurate adjustment and correct torque. A fine mill file or India stone is suitable for this purpose. Studs must be
tight prior to reassembling the parts.
All Rockwell-Standard bronze bushed differential pinions should be ball burnished after bushing installation. Install
the bushing with a small stepped drift, The small O.D. should be .010" smaller than the bushing burnished I.D. and
1 1/2 times bushing length. Always install bushings so end is even with the I.D. chamfer or about 1/16" below the