Wheel Bearings Diagnosis

WHEEL BEARINGS DIAGNOSIS

TOOLS REQUIRED
J 8001 Dial Indicator

The following procedure describes how to inspect the wheel bearing/hub for excessive looseness. If you are inspecting the wheel bearing/hub for excessive runout, refer to Hub/Axle Flange and Wheel Stud Runout Inspection in Vibration Diagnosis and Correction.

IMPORTANT: If you are inspecting the FRONT wheel bearing/hub, support the front of the vehicle by the lower control arms in order to load the lower ball joint.

1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Remove the wheel and tire.
3. Mount and secure the J 8001 to the steering knuckle.
4. Firmly push the hub flange towards the vehicle.
5. Ensure that the J 8001 contacts the vertical surface of the hub flange as close as possible to the center of the flange.
6. Firmly pull the hub flange away from the vehicle.
7. Inspect the total movement indicated by the J 8001.
8. If the measurement exceeds 0.051 mm (0.002 in), replace the wheel bearing/hub.