34 11 220 Removing and Installing/Replacing Both Front Brake Discs

34 11 220 Removing and installing or replacing both front brake discs

Special tools required:





Necessary preliminary tasks:
^ Remove wheels.
^ Remove and clean brake pads

Check minimum brake disc thickness:





- Position special tool 34 1 280 at three measuring points in area (1) and measure.
- Compare measurement result and lowest value with set point value.

If the brake discs are replaced, you must also fit new brake pads.

Brake discs may only be replaced in pairs (on each axle).





Important!
New brake pads may only be fitted if the brake disc thickness is greater than the minimum brake disc thickness (MIN TH).





Release screws (1), remove brake calliper (2) with brake console (3) and tie back.

Installation:
Tightening torque 34 11 2AZ.

Check that brake hose is correctly seated in holder.

Important!
To release brake disc: Do not under any circumstances strike friction ring with a hammer or similar!





If necessary, carefully tap on base of brake disc chamber with a rubber mallet.
Clean contact surface of brake disc at wheel hub thoroughly and remove traces of corrosion.
Unevenness on contact surface may result in distortion of brake disc!

Release screw (1) and remove brake disc (2).

Installation:
Replace screw.

Tightening torque 34 11 1AZ.





After installation:
^ Read and comply with notes on braking in new brake discs / brake pads.