34 21 320 Removing and installing or replacing both rear brake discs
Special tools required:
Necessary preliminary tasks:
- Remove WHEELS .
- Remove and clean BRAKE PADS
After completing repair work:
- Adjust PARKING BRAKE
- Read and comply with notes on BREAKING IN NEW BRAKE DISCS/BRAKE PADS .
Check minimum brake disc thickness:
- Position special tool 34 1 280 at three measuring points in area (1) and measure.
- Compare measuring result and lowest value with SETPOINT VALUE .
Always replace brake discs in pairs.
Attention!
New brake pads may only be installed if the brake disk thickness is greater than the MINIMUM BRAKE DISC THICKNESS .
Release screws (1). Detach brake-caliper support.
Installation note:
Replace screws.
Tightening torque 34 21 2AZ .
Attention!
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 note:
Replace screw.
Tightening torque 34 21 1AZ .