911 Carrera 4S (997) F6-3.8L (2007)
compensated for by increased pressure on the brake pedal. The same also applies after replacing or machining brake discs.
Rear With PCCB
Checking rear PCCB brake discs (wear assessment)
Checking information on PCCB brake discs
Basic information
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.
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.
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.
Minimum thickness (x) of the PCCB brake disc