MOT No. 37
The front wheels run on double row ball bearings. Angular-contact tapered roller bearings are installed at the rear on front-wheel drive models. All-wheel drive vehicles have the same ball bearings at the rear as they do at the front. They are grease lubricated and typically last much longer than 100,000 km. Defective bearings attract attention with noise during movement. While driving, it is difficult to determine which bearing is faulty. You can find a faulty bearing with the car raised by rotating the wheels manually. A wheel with damaged bearings rotates with a crunch and is uneven.
Dust covers are checked in the same way as it is done for the tie rod joints.
Left: Shown here is the front axle pivot at the bottom of the wheel bearing housing.
Right: The illustration shows the rear axle in 4WD vehicles. Here the hinge (arrow) located on the inside of the upper control arm (1).
Try to shake one by one the wheels firmly on the ground about their vertical axis.
With serviceable bearings, there should be practically no play.
If the play is noticeable, press the brake pedal and shake the wheel again: if there is no more play, then the reason is in the bearing.
If there is still play: the wheel suspension needs to be checked.
Now you need to raise the car and turn the wheel: if it moves hard or jerks, then the bearing is too tight. If you can clearly hear the rattle, the bearing needs to be replaced.
Hint: The rear wheel bearings on front wheel drive models can be adjusted. The rear bearings of all-wheel drive models, as well as the bearings of all front wheels, are not adjustable.
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