HGV wheel hub replacement: when it is needed and what to check
A wheel hub replacement on an HGV is usually triggered by one of three things: bearing housing wear that has put the bearing running clearance outside tolerance, physical damage to the hub flange from a wheel separation incident or severe road impact, or heat discolouration and metallurgical damage following a bearing seizure.
Before ordering, identify the axle type. Steer axle hubs, drive axle hubs, and trailer axle hubs are different components with different bearing arrangements, stud patterns, and flange configurations. The hub also needs to match the brake system: disc brake hubs and drum brake hubs are not interchangeable. Cross-reference the OE part number from the original unit or call us with the chassis number and axle specification.
When replacing a hub, replace the wheel bearings and bearing seals at the same time. Fitting new bearings in a used hub that is at the limit of its running tolerance is a false economy.
Frequently Asked Questions
How do I know if a wheel hub needs replacing rather than just the bearings?
If the bearing housing bore is worn, scored, or oval, the hub needs replacing. Measure the bore with a dial gauge against the specification. If the hub flange shows cracks, heat discolouration from a previous bearing failure, or is distorted, replace the hub. On standard bearing wear without housing damage, bearings alone can be replaced.
Do I need to replace the ABS tone ring when I replace the hub?
It depends on the design. On hubs where the tone ring is pressed on separately, it can be transferred to the new hub if it is undamaged. On hubs where the tone ring is integral, you get a new ring as part of the hub. Check the tone ring for cracks or missing teeth before refitting.
Can I reuse the wheel studs from the old hub?
Wheel studs that are undamaged, of the correct thread form, and within specification can be reused. On hubs removed due to bearing seizure or heat damage, the studs may have been exposed to significant temperatures and should be replaced. If in doubt, fit new studs.
Do I need to reset the wheel bearing preload after fitting a new hub?
Yes, on conventional tapered roller bearing arrangements. Follow the manufacturer's specified preload procedure for the axle type. Incorrect preload is a leading cause of premature bearing failure on HGVs.