Test Values And Wear Limits For Pccb Brake System
WARNING: This page is about a different car, the 2021 Porsche Macan, 2020 Porsche Macan, and 2019 Porsche Macan. However, it is still accessible from the selected car via links, so may be relevant.
Information
Depending on the wear of PCCB brake discs, the following condition criteria can make replacement necessary:
- Advanced stages of surface changes in the brake disc friction surfaces.
- Minimum brake disc thickness is not retained due to wear (material erosion due to friction).
- Check the friction surfaces using> VAS 6813 - PCCB brake disc tester .
Information
The PCCB brake disc must not be machined.
| Location | Description | Type | Basic value | Tolerance |
|---|---|---|---|---|
| Pad thickness, front | Wear limit 2 mm | Dimension | 8.4 mm | |
| Pad thickness, rear | Wear limit 2 mm | Dimension | 11.3 mm | |
| Maximum lateral runout of brake disc | Control value | 0.03 mm | ||
| Maximum lateral runout of wheel hub | Control value | 0.03 mm | ||
| Maximum lateral runout of brake disc when installed | Control value | 0.06 mm |
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, lateral failure, thickness tolerance, flatness and surface roughness using > VAS 6813 - PCCB brake disc tester .
- Replacing brake disc