34 21 320 Removing And Installing/Replacing Both Brake Discs
Special tools required:
Always replace brake discs in pairs.
New brake pads must always be fitted when replacing the brake discs.
Necessary preliminary tasks:
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 SETPOINT VALUE .
New brake linings may only be installed if the brake disc thickness is greater than or equal to the MINIMUM BRAKE DISC THICKNESS (MIN TH) .
When removing the brake disc: On no account strike the friction ring with a hammer or similar object! If necessary, carefully tap with a rubber hammer against the brake disc nave.
Release retaining screw
Remove brake disc.
Installation:
Replace screw.
Tightening torque 34 21 1AZ
Clean contract face of wheel hub thoroughly and remove any traces of rust if necessary.
Irregularities in the contact surface can cause distortion in the brake disc!