Diagnose humming, play and heat in CV wheel bearings – when to replace bearings vs full hub units, torque specs and grease selection.
What you will gain from this guide
- Bearing hum increases with speed – different from tyre noise
- Axle nut torque sets bearing preload on adjustable hubs
- Replace seals with every bearing service
- Sealed hub units should be replaced whole – not repacked
Wheel bearing failure on a loaded commercial vehicle is a safety emergency. The gradual hum that drivers ignore for weeks can become wheel lock-up under gross vehicle weight.
Warning signs
- Rising road noise correlating with speed
- Wheel play felt at 12 and 6 o'clock
- ABS fault after bearing play disturbs tone ring
- Hub overheating smell after a run
Bearing noise on your vehicle? Search bearings and hubs or speak to our parts team.
