HUB / BEARING
DESCRIPTION
The wheel bearing used on the front of this vehicle
is a unit type combined hub and bearing assembly
(Fig. 1). The hub and bearing is made up of the
wheel mounting hub (flange) and the wheel bearing.
The hub has six wheel mounting studs installed in it.
It is held together using a clamp bolt and nut that is
torqued and crimped in place when assembled. The
clamp bolt is not serviceable and no attempt should
ever be made to remove it from the hub and bearing.
The hub and bearing assembly is mounted to the
steering knuckle and is retained by four mounting
bolts accessible from the back of the knuckle.
The bearing requires no periodic maintenance. The
hub and bearing is serviced as an assembly if the
hub or bearing is determined to be defective. The
wheel mounting studs may be replaced separately if
necessary.
DIAGNOSIS AND TESTING - HUB AND
BEARING (FRONT)
With the wheel, disc brake caliper, and brake rotor
removed, rotate the wheel hub. Any roughness or
resistance to rotation may indicate dirt intrusion or a
failed wheel bearing. If the bearing exhibits any of
these conditions during diagnosis, replace the hub
and bearing. The bearing is not serviceable.
Damaged bearing seals and the resulting excessive
grease loss may also require hub and bearing
replacement. Moderate grease seepage from the bear-
ing is considered normal and should not require
replacement of the hub and bearing.
Stands, Suspension Height 9096
Remover, Ball Joint C-4150A
Handle, Drive C-4171
Remover, Tie Rod End MB991113
Fig. 1 Hub And Bearing
1 - WHEEL MOUNTING HUB
2 - HUB/BEARING ASSEMBLY
3 - CLAMP BOLT/NUT
4 - WHEEL MOUNTING STUD
ZB FRONT SUSPENSION 2 - 5
FRONT SUSPENSION (Continued)
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