Front Brake Disc

Brake disc, front, calibrating
Special tools:
115 8147
999 5418
999 5419
999 5s07

Preparations





Remove:
- the wheel
- the mounting screws for the brake caliper holder.

Hang the brake caliper from the spring using a wire.

Install the clamp ring





Install clamp ring 999 5419 (included in measurement tool set 999 5418), on the hub. Secure the clamp ring using the wheel nuts.
Ensure that mating surfaces on the brake disc and clamp ring are clean.
Tighten the studs lightly. Then tighten crosswise. Tighten to 110 Nm. Torque socket 115-8147 must be used when tightening using an impact wrench.

Install the bracket included in the test equipment





Install the bracket for the Upper mounting hole first.
Press the bracket against the constant velocity joint housing.
Then install the lower mounting screw in the hole. At the same time, secure the bracket using the lower screw.
Tighten the nuts.
Use the M12 screws and nuts included in kit 999 5507.

Install the dial gauge





Install the dial gauge in the bracket as illustrated.

Measure the lateral run out





Put the test gauge point against the brake disc as illustrated.
Rotate the brake disc. Use a socket to help.
Note the test gauge run-out. Brake disc lateral run-out must not exceed 0.040 mm.
If lateral run-out exceeds the value, replace the brake disc.

Finishing work

Remove the test equipment





Install the caliper holder and the brake caliper. Use new screws on the caliper holder. Tighten to 100 Nm.

Install the wheel
Installing wheels