Problem: diagnosing unitized style wheel bearings
Cause: The sealed design of the wheel bearing sometimes makes identifying which bearing is the source of the complaint difficult.
Solution: There are a number of techniques available that can help pinpoint a failing bearing. They are listed below:
+ Test Drive
+ Vibration Test
+ Stethoscope Test
CAUTION: Extreme care must be taken when working near a rotating wheel.
+ Isolation Test