911 Carrera 4 Cabriolet (997) F6-3.6L (2006)
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Checking involves the following:
1. Visual inspection for any surface changes to the brake disc friction surfaces Indication of wear: Associated surface fracture > 1 cm2 -arrow-, but
no accumulation of smaller fractures -> Visual inspection of the surfaces of the brake disc friction surfaces (indication of wear).
Associated surface fracture
Surface roughness of PCCB brake disc
2. Assess the surface roughness (Sr) of the brake discs (max. 80 microns permitted), since this affects smoothness of braking (noise), braking
performance/pedal pressure and brake pad idle time -> Evaluating surface roughness (Sr) (max. 80 micrometer permitted).
3. Check brake discs for minimum thickness -x-. The minimum thickness of the brake disc (example: Min. Th. 33.7 mm) is stamped on the brake disc
chamber -> Checking brake discs for minimum thickness.
Minimum thickness (x) of the PCCB brake disc
4. Check brake discs for edge damage -see illustration- (damage caused as a result of improper use) -> Checking brake discs for edge damage.
