Road-test techniques to diagnose hub bearing failure before wheel-off inspection on CV fleets.
What you will gain from this guide
- Bearing noise often changes on cornering load
- Tyre hum is usually speed-stable across turns
- Do not delay bearing replacement once play is felt
Misdiagnosed wheel bearing noise leads to wrong tyre replacements and eventual hub damage. A structured road test saves workshops time and fleet money.
Road test method
- Note whether noise shifts on gentle left/right curves
- Compare sound with tyre tread wear pattern
- Feel for hub play at 12 and 6 o'clock
Replacement
- Replace hub assembly or bearings per manual
- Use new hub seals every time
- Torque wheel nuts to specification
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