PRE-RELEASE
Rear wheel hub (VIN: X3025752-)
| Rear wheel hub (VIN: X3025752-) |
| To remove |
| 1. |
Raise the car and remove the wheel.
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| 2. |
Press back the brake piston using slip-joint pliers.
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| 3. |
Remove the brake caliper and hang it up.
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| 4. |
Back off the parking brake shoe adjustment. It is accessible through a hole in the brake disc.
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| 5. |
Remove the brake disc retaining bolt. Remove the brake disc.
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| 6. |
Remove the air separator.
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| 7. |
Remove the bolt securing the parking brake cable attachment.
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| 8. |
Unplug the connector from the wheel sensor.
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| 9. |
Remove the wheel sensor cable from the holder.
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| 10. |
Remove the attachment for the wheel sensor cable and the brake pipe (2 nuts).
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| 11. |
Remove the hub nuts. Use a long 15mm socket with 3/8 fitting, part no. 30 34 444, and extension with ball fitting.
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| 12. |
Remove the wheel hub from the disc back-plate and leave the disc back-plate and parking brake unit suspended from the wire.
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| To fit |
| 1. |
Clean the contact surfaces using a wire brush.
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| 2. |
Position the wheel hub on the back plate and secure both to the longitudinal link using new nuts. Tighten the nuts alternately.
Tightening torque: 50 Nm +30° (40 lbf ft +30°) |
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| 3. |
Fit the brake disc.
Fit the lock screw with Loctite 242. Tightening torque: 10 Nm (7 lbf ft) |
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| 4. |
Adjust the parking brake, see
Adjusting the parking brake shoes
.
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| 5. |
Fit the brake caliper. Use Loctite 242, part no. 74 96 268, on the bolts.
Tightening torque: 80 Nm (59 lbf ft) |
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| 6. |
Fit the attachment for the wheel sensor cable and the brake pipe.
Tightening torque: 24 Nm (18 lbf ft)
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| 7. |
Fit the wheel sensor cable in the attachment.
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| 8. |
Plug the connector into the wheel sensor.
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| 9. |
Fit the attachment for the parking brake wire.
Tightening torque: 8 Nm (6 lbf ft) |
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| 10. |
Fit the air separator.
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| 11. |
Fit the wheel. See
Wheels
.
Tightening torques aluminium rim 110 Nm (81 lbf ft) pressed steel rim 50 Nm +2x90°, max. 110 Nm (37 lbf ft +2x90°, max. 81 lbf ft) |
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| 12. |
Lower the car.
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| 13. |
Depress the brake pedal to press out the pistons in the brake calipers.
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