Removing and Installing the Front Brake Disc

Removing and installing the front brake disc
Tools





Preliminary work
Remove wheel.

Removing front brake disc

Note: In order to gain better access for removal of the brake caliper, it is beneficial to turn the wheels fully either to the right or the left.

1. Release retainer for plug of wear indicator on wheel carrier.
2. Disconnect the speed sensor on the ABS sensor.





3. Push brake pad back slightly and evenly with piston resetting fixture (replaces P83) NR.144, -direction arrow-. Make sure that no brake fluid runs out of the supply tank - if necessary, remove by suction.
4. Undo brake caliper on wheel carrier and hang it in a suitable place in the wheel well (do not open the brake hydraulics!).





5. Remove brake disc after unscrewing the fastening screw. If necessary, remove the brake disc by tapping it gently with a rubber hammer.

Installing front brake disc
Do not confuse right and left brake discs during assembly!
Distinguishing characteristic: Part No.! The flat surface of the brake discs is marked with R = right or L =left.

1. Check that all parts are in perfect condition and replace them if necessary.
2. Clean the leveling and centering surfaces on the brake disc and wheel hub. Then apply a very thin coat of Optimoly TA to the centering surface on the wheel hub.





3. Fit the brake disc. Observe correct tightening torque ->46 Tightening torques for brake mechanics - chapter on Technical values'.
4. Fit the brake caliper. Replace the brake caliper fastening screws after each removal. Observe correct tightening torque for brake mechanics - chapter on Technical values'.
5. Install retainer for plug of wear indicator on wheel carrier.
6. Connect the speed sensor on the ABS sensor.
7. Position disc brake pads by operating the brake several times.





8. Check brake fluid level and correct if necessary. The brake fluid level must lie within the -> see figure MAX - MIN marking.

Subsequent work
Mount wheel.