34 11 667 Precision-turning both front brake discs on both sides
Observe Max. machining dimension per friction ring side, see 34 11 FRONT BRAKE E83 .
Minimum brake disc thickness (MIN TH)
Brake discs of M models (Compound brake discs) must not be machined!
Only one brake pad set may be used up on brake discs which have been lathe-turned to minimum thickness (MIN TH).
Stationary brake disc lathe:
In the case of stationary brake disc lathes, the brake disc must be removed, see 34 11 220 Removing and installing/replacing both front brake discs .
Please refer to the lathe manufacturer's instruction manual for the exact procedure.
Mobile brake disc lathe:
In the case of mobile brake disc lathes, only the brake caliper must be removed, see 34 11 519 Removing and installing/replacing left or right front brake caliper .
The brake discs remain on the car.
Please refer to the lathe manufacturer's instruction manual for the exact procedure.
After fine-grinding the brake discs, measure the thickness difference inside the braking surfaces at 8 points with an external micrometer, see 34 11 FRONT BRAKE E83 .