5
minimum dropping point of 440°F.
Always replace bearings and races as a set. Install races (new
hub/drums should have races already installed) using a mild steel
drift or bar. Do not use hardened steel or brass bars as they may
damage, chip or leave deposits on the races. Final setting of the
race against the shoulder should be checked with feeler gauges and
be within 0.002” of the shoulder in the hub/drum.
After bearings have been packed with grease, place inner bear-
ings into correct position, seated into race or cup. Place a new seal
over bearing (never reuse previous seal). Use a seal driver or hard
rubber mallet and tap gently. Be sure seal is seated fully and com-
pletely.
1. To get the proper “feel” for bearing clearance, the spindle nut
must turn freely on the spindle and the brake must be readjusted
so that there is no drag on the drum.
2. While slowly turning the hub/drum tighten the spindle nut to ap-
proximately 20 ft/lbs then loosen to first notch in nut. This is
especially important if new bearing races have been installed.
3. With drum stationary (do not rotate), retighten the spindle nut to
Over packing the hub results in grease seeping out of the dust cap
and wheel seal.
CAUTION
!
WARNING
!
Improper bearing adjustment can lead to wheel bearing failure which
could cause the hub/drum and wheel to separate from the axle during
operation. This could result in property damage, serious personal
injury, or loss of life.
WARNING
!
Improper seal or bearing installation or adjustment or insufficient
maintenance can lead to wheel bearing failure which could cause the
hub/drum and wheel to separate from the axle during operation re-
sulting in property damage, serious personal injury, or loss of life.
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