Wear Limits

Technical data/test values and brake wear limits

















Technical values








Test values and wear limits for 19" brake system (Turbo/Turbo S, model year 2009)

Information
Depending on the extent of wear on cast iron brake discs, two condition criteria can make replacement necessary:
Formation of cracks at advanced stage on the brake disc friction surfaces.
Minimum brake disc thickness is not retained due to wear (material erosion due to friction).

Information
The 2-part brake disc must not be machined.





Possible complaints

Damage due to lack of use (rusting). This causes vibrations in the steering wheel, noises and brake pedal pulsation.
Brake disc becomes distorted as a result of serious driving.
Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.

Procedure

Check brake disc for cracks, minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.

Test values and wear limits for PCCB brake system

Information
The following condition criteria can make replacement necessary depending on the wear of the PCCB brake discs:
Surface changes in the brake disc friction surfaces at an advanced stage.
Minimum brake disc thickness is not retained due to wear (material erosion due to friction).

Information
The PCCB brake disc must not be machined.








Possible complaints

Brake disc becomes distorted as a result of serious driving.
Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.

Procedure

Check brake disc for cracks, minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.