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Home >> Porsche >> 2017 >> Macan GTS >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (46 - Brakes - Brake Mechanics -- PANAMERA (970)) >> WM 465102 Checking Front PCCB Brake Discs (Wear Assessment) (Except PANAMERA GTS, PANAMERA Turbo S, PANAMERA 4 Executive, PANAMERA Platinum Ed., PANAMERA 4 Platinum Ed.) >> Information On Checking PCCB Brake Discs >> Basic Information

Basic Information

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Checking involves the following tasks: 

  1. 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
    G09808026Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  2. 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
    G09808027Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  3. 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
    G09808028Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  4. 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
    G09808029Courtesy of PORSCHE CARS NORTH AMERICA, INC.