Adjust wheel bearing – Spicer Single Drive Axles Service Manual: S140 Series User Manual

Page 34

Wheel Adjustment Systems

Adjust Wheel Bearing

Do not mix spindle nuts and lock washers from different
systems. Mixing spindle nuts and lock washers can cause
wheel separation.

Note: The lock washer for a four-piece tang/dowel-type wheel

nut system is thinner than the lock washer for a three-
piece tang-type wheel nut system and is not designed to
bear against the inner nut.

Inspect the spindle and nut threads for corrosion
and clean thoroughly or replace as required.

Note: Proper assembly and adjustment is not possible if the

spindle or nut threads are corroded.

Inspect the tang-type washer (if used). Replace the
washer if the tangs are broken, cracked, or dam-
aged.

Install the hub and drum on the spindle with care to
prevent damage or distortion to the wheel seal.

A wheel dolly is recommended during installation to make
sure that the wheel seal is not damaged by the weight of the
hub and drum. Never support the hub on the spindle with
just the inner bearing and seal. This can damage the seal
and cause premature failure.

Completely fill the hub cavity between the inner and
outer bearing races with the same lubricant used in
the axle sump.

Before installation, lubricate the outer bearing with
the same lubricant used in the axle sump.

Note: Lubricate only with clean axle lubricant of the same

type used in the axle sump. Do not pack the bearings
with grease before installation. Grease will prevent the
proper circulation of axle lubricant and may cause wheel
seal failure.

Install the outer bearing on the spindle.

Install the inner nut on the spindle. Tighten the inner
nut to 200 lbs. ft. (271 N•m) while rotating the wheel
hub.

Never use an impact wrench to adjust wheel bearings. A
torque wrench is required to assure the nuts are properly
tightened.

Back off the inner nut one full turn. Rotate the wheel
hub.

Retighten the inner nut to 50 lbs. ft. (68 N•m) while
rotating the wheel hub.

10. Back off the inner nut exactly 1/4 turn.

Note: This adjustment procedure allows the wheel to rotate

freely with 0.001" -.005” (0.025 mm–0.127 mm) end-
play.

11. Install the correct lock washer for the wheel nut sys-

tem being used.

Three-piece Dowel-type Lock Washer System

1 - Inner nut

2 - Dowel pin

3 - Dowel-type lock washer

4 - Outer nut

•

Install the Dowel-type lock washer on the spindle.

Note: If the dowel pin and washer are not aligned, remove

washer, turn it over and reinstall. If required, loosen the
inner nut just enough for alignment.

Never tighten the inner nut for alignment. This can preload
the bearing and cause premature failure.

WARNING

CAUTION

IMPORTANT