CLEAN, INSPECT, AND REPAIR
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 the planetary reduction, planet gears, sun gear, and ring gear assembly for wear or
damage. Gears which are scored, pitted, ridged, or worn should be replaced.
Inspect planetary reduction for the following:
Pitted, scored, or worn thrust washers.
Worn or ridged planet pinion pins.
Worn, scored, or chipped planet pinions.
Inspect axle shafts for signs of torsional fractures or other indications of impending failure.
Replace all worn or damaged parts. Replace all hex nuts with rounded corners, lockwashers, dis-
torted snaprings, oil seals, gaskets, and socket felts at time of overhaul.
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.
Tighten all the nuts and cap- screws to the correct torque. (Refer to Tabulation of Torque Limits
following servicing instructions.)
The burrs caused by lockwashers at the spot face of stud holes of knuckle flanges, spider flange, or
hub cover, should be removed to assure easy reassembly of these parts.