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2 - 6
FRONT SUSPENSION
FRONT SUSPENSION (Continued)
Remover/Installer Control Arm Clevis Bushing 6877
Installer, Ball Joint Seal Boot Retainer 6875
Remover, Tie Rod
Remover, Lower Ball Joint C-4150A
HUB / BEARING
DESCRIPTION
The bearing used on the front hub of this vehicle is
the combined hub and bearing unit type assembly.
This unit combines the front wheel mounting hub
(flange) and the front wheel bearing into a one piece
unit. The hub and bearing assembly is mounted to
the steering knuckle and is retained by three mount-
ing bolts accessible from the back of the steering
knuckle. The hub and bearing unit is not serviceable
and must be replaced as an assembly if the bearing
or the hub is determined to be defective. The wheel
mounting studs used to mount the tire and wheel to
the vehicle are the only replaceable components of
the hub and bearing assembly.
OPERATION
The hub and bearing has internal bearings that
allow the hub to rotate with the driveshaft and tire
and wheel.
DIAGNOSIS AND TESTING - HUB AND
BEARING
The hub and bearing is designed for the life of the
vehicle and requires no type of periodic maintenance.
The following procedure may be used for diagnosing
the condition of the wheel bearing and hub.
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 hub bearing. If the bearing exhibits any of
these conditions during diagnosis, the hub bearing
will require replacement. The bearing is not service-
able.
Damaged bearing seals and the resulting excessive
grease loss may also require bearing replacement.
Moderate grease weapage from the bearing is consid-
ered normal and should not require replacement of
the wheel bearing.
To diagnose a bent hub, (Refer to 2 - BRAKES/HY-
DRAULIC-MECHANICAL/ROTOR
AND TESTING).
REMOVAL
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/JUMP STARTING - STANDARD
PROCEDURE).
(2) Remove front tire and wheel assembly.
CAUTION: Wheel bearing damage will result if hub
nut is loose, then vehicle is rolled on the ground or
the weight of the vehicle is allowed to be supported
by the tires.
(3) Loosen hub nut with brakes applied. The hub
and driveshaft are splined together through the
knuckle (bearing) and retained by the hub nut.
(4) Remove disc brake caliper, adapter, shoes and
rotor from steering knuckle. (Refer to 5 - BRAKES/
HYDRAULIC/MECHANICAL/ROTOR - REMOVAL)
(5) If equipped with antilock brakes, remove bolt
securing wheel speed sensor cable routing bracket to
steering knuckle (Fig. 3).
(6) Remove nut from upper ball joint stud.
(7) Remove upper ball joint stud from steering
knuckle using Puller, Special Tool, C-3894-A (Fig. 4).
JR
-
DIAGNOSIS
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