46501950 Removing and Installing Front Brake Disc

WM 465019 Removing and installing front brake disc

Tools






Preliminary work

1. Remove wheel. -> 440519 Removing and installing wheel Removal and Replacement

Removing front brake disc

Information

- 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 connector for wear indicator on wheel carrier.
2. Disconnect the speed sensor (ABS sensor).
3. Push brake pads back slightly and evenly with piston resetting fixture (replaces P83) NR.144 , refer to Tools and Equipment -direction arrow-. Make sure that no brake fluid runs out of the supply tank - remove brake fluid by suction if necessary.





4. Remove brake caliper on the wheel carrier and hang it in a suitable place in the wheel well (do not open 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 levelling 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 mechanism - section on "Technical values".





4. Fit the brake caliper. Replace the brake caliper fastening screws following removal. Observe correct tightening torque -> 46 Tightening torques for brake mechanism - section on "Technical values".
5. Fit retainer for connector for wear indicator on wheel carrier.
6. Fit the speed sensor (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 be between the => see figure MIN and MAX markings.






Subsequent work

Mount wheel. -> 440519 Removing and installing wheel Removal and Replacement