Front
Front Wheel Bearing/Hub, Replacing
Special Tools: 951 2050, 999 5259, 999 5562, 999 5563
Preparation
Remove
- the wheel
- the ABS sensor.
Detach the ABS sensor cable from the spring strut.
Remove both mounting screws from the brake caliper.
Hang up the brake caliper, on the spring strut for example.
NOTE: Take care not to damage the brake hose while working.
Remove the screw holding the drive shaft.
Counterhold the brake disc. Use a screwdriver.
Remove
- the locating pin for the brake disc
- the brake disc.
Tap the end of the drive shaft into the hub approximately 10 - 15 mm. Use a brass drift.
Remove the upper link for the anti-roll bar from the spring strut.
Remove the steering arm from the wheel spindle.
- Use puller 999 5259.
Blow clean around the ball joint with compressed air.
Spray the area around the ball joint with plenty of rust penetrator. Spray the screw and the nut holding the ball joint with rust penetrator.
If the screw has rusted solid, slacken of the nut a few turns. Knock the screw so that it loosens. Remove the nut and screw.
Spray the ball joint with rust penetrator again.
NOTE: Do not insert a screwdriver or punch between the "ears" on the wheel spindle.
Tap the ball joint off the wheel spindle.
- Use a socket as a spacer.
NOTE: The inner diameter of the sleeve must be larger than the outer diameter of the cover. This is to prevent damage to the cover.
Spray the ball joint with rust penetrator again.
Move the ball joint up and down by hand (alternatively use a jimmy bar) until the ball joint detaches from the wheel spindle.
Install the protective socket 999 5562 on the ball joint.
Secure the control arm in the depressed position using tool 999 5563
Remove the drive shaft from the hub.
Turn the spring strut a half turn and lock it. By positioning the steering arm on the control arm.
NOTE: Take care not to damage the brake hose.
Hang up the drive shaft on the spring strut.
Replacing the Front Wheel Bearing and Hub
Remove the wheel bearing unit.
Check the wheel spindle mating surfaces against the wheel bearing unit.
Also check the screw head mating surfaces on the wheel spindle.
Lubricate all the mating surfaces sparingly.
Install the wheel bearing unit. Use new screws. Lightly lubricate the outer threads and tighten crosswise. Tighten to 65 Nm.
Angle-tighten the screws for the wheel bearing unit crosswise. Tighten to 60 degrees. Use bevel protractor 951 2050.
Finishing
Check the drive shaft for damage to the mating surfaces with the wheel bearing.
Check the splines.
Clean and check the pulse wheel. Check the shape of the cogs.
Lubricate the splines and mating surfaces with the wheel bearing sparingly.
Remove the drive shaft from where it was hung earlier.
Turn the spring strut a half turn to disconnect it from the control arm.
NOTE: Take care not to damage the brake hose.
Install the drive shaft in the hub by hand. It must be possible to move the drive shaft easily backward and forward when it is in position.
Lubricate a new drive shaft screw. Screw it in a few turns by hand.
Clean off any rust from the ball joint and wheel spindle.
Lubricate the ball joint pinion. Lubricate the wheel spindle.
Install the ball joint in the wheel spindle
NOTE: Press the ball joint upwards so that the conical top is visible above the screwed joint on the wheel spindle.
Install the screw and a new nut.
- Tighten to 50 Nm.
Check the dust boot on the anti-roll bar link for damage.
Check the threads on the link for damage. Lubricate the threads.
Install the upper link of the anti-roll bar on the spring strut. Use a new lock nut. Tighten to 50 Nm.
Install the tie rod on the wheel spindle. Use a new lock nut. Tighten to 70 Nm.
Check that the brake disc mating surfaces with the wheel bearing unit are smooth and even.
Install
- the brake disc
- the locating pin for the brake disc. Tighten to 8 Nm.
Check the mating surfaces of the brake caliper and wheel spindle.
Clean and grease the surfaces of the steering limiter.
Install the brake caliper. Use new screws. Tighten to 100 Nm.
Tighten the center screw for the drive shaft.
Counterhold the brake disc. Use a screwdriver.
Clean and check that the ABS sensor mating surface on the wheel spindle is true.
Apply a very small amount of grease to the mating surface.
Install the ABS sensor cable in the holder on the spring strut.
Install the ABS sensor. Lubricate the screw and tighten it. Tighten to 10 Nm.
Install the wheel
- Install the wheel studs lightly. Then tighten crosswise. Tighten to 110 Nm.