Brake Disc Front, Calibrating

Brake disc front, calibrating
Special tools: 999 7104, 999 5418, 981 4031

Note: The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Preparatory work
Remove:
- the wheel
- the mounting screws for the brake caliper holder.
Hang up the brake caliper in a suitable position.

Installation
Installing the clamp ring





Install: 999 7104, included in test tool kit: 999 5418, on the hub with the wheel nuts. Ensure that mating surfaces on the brake disc and clamp ring are clean. Tighten the studs lightly. Then tighten the screws crosswise. Tighten to 90 Nm. When tightening with impact wrench, use: 981 4031

Installing the bracket





Use the M12 x 40 wing screws and the M12 nuts from: 999 5418.

Measuring lateral run-out





Install the dial gauge in the bracket as illustrated. Position the tip of the dial gauge against the brake disc. Rotate the brake disc. Use a socket to help. Note the test gauge run-out. Brake disc lateral run-out must not exceed 0.075 mm. If lateral run-out exceeds the value, replace the brake disc. To replace the brake disc, see: Brake disc front, replacing To replace the brake disc, turbo Sports wagon, see: Brake disc front, replacing

Finishing
Remove the test equipment.
Install the caliper holder and the brake caliper.
Use new screws on the caliper holder.
Tighten to specification.
Install the wheel.