Basic Information

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Checking involves the following tasks:

Visual inspection for surface changes in the brake disc friction surfaces and wear indicators. Indication of wear: Connected surface fracture > 1 cm²-arrow- , without adding up smaller fractures → Checking PCCB Brake Discs (Wear Assessment) .

Fig 1: Locating Associated Surface Fracture
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check surface roughness (Rk) of brake discs (max. 80 μm permitted) since this affects braking comfort (noises), braking behavior/pedal pressure and brake pad service life → Checking PCCB Brake Discs (Wear Assessment) .

Fig 2: Identifying Surface Roughness Of PCCB Brake Disc
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check brake discs for minimum thickness -X- . The minimum thickness of the brake disc (example: Min. Th. 37.7 mm) is stamped on the brake disc hub → Checking PCCB Brake Discs (Wear Assessment) .

Fig 3: Locating Minimum Thickness -X- Of PCCB Brake Disc
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check brake discs for edge damage → Edge damage on PCCB brake disc (damage due to improper use) → Checking PCCB Brake Discs (Wear Assessment) .

Fig 4: Locating Edge Damage On PCCB Brake Disc
Courtesy of PORSCHE CARS NORTH AMERICA, INC.