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Wheel bearing failure diagnosis 6 | 7
Oval deformation
damage
Problem
Cause
Remedy
Problem
Cause
Remedy
The wheel bearing starts to make
One of the two inner rings is damaged:
Replace wheel bearing and hub.
Wheel bearing starts to make
Medium oval deformation in the
Replace steering knuckle and wheel
loud noises (grating sounds)
noises after a certain mileage has
location bore of the steering knuckle,
bearing.
after it has been fitted during the
1. The wheel hub does not fit because
been completed (500-3,000 km);
that is still enough to restrict the radial
subsequent trial run.
the setting is too narrow.
extreme heat development at the
clearance of the wheel bearing and
start of operation
thus cause the damage described in
2. The wrong tool has been used to
Replace complete wheel bearing.
the previous point.
fit the inner ring so that it is canted on
the wheel hub; the wedge or bushing
Extreme heat development at the
1. Axial clearance of wheel bearing
Check settings of the steering knuckle
is not parallel between the plunger
start of operation
between wheel hub and steering
and wheel hub and readjust if neces-
and the side of the bearing ring.
knuckle is extremely restricted. Parts
sary.
incorrectly adjusted or incorrectly fitted.
3. Excessive oval deformation in the
Replace steering knuckle and wheel
location bore with corresponding ex-
bearing.
2. Incorrect installation of the wheel
Remove wheel bearing and check
treme restriction in the bearing
bearing in the location bore (no circlips
whether circlips are present, replace
clearance of the wheel bearing in the
in the location bores) causes gradual
wheel bearing if necessary.
confined areas of the oval deformation.
axial offset of the wheel bearing and
hub. The turning hub rubs against
4. Damaged location bore in the
Rectify minor flaws on the wheel hub
the stationary wheel bearing seat.
steering knuckle.
(e.g. by polishing) or replace wheel hub
This high level of friction increases the
and bearing.
temperature at the wheel bearing. The
5. Deep scratches or dents, both on
grease burns and the component fails.
the bearing seat of the wheel hub
Rectify minor flaws on the wheel hub
and on the wheel bearing, caused by
(e.g. by polishing) or replace wheel hub
incorrect removal.
and bearing.