Test Values And Wear Limits For PCCB Brakes
WARNING: This page is about a different variant/trim than selected.
Information
The following condition criteria can make replacement necessary depending on the wear of the PCCB brake discs (new generation without indicators in the friction surface):
- Too many damaged carbon fibres in the PCCB brake disc (wear caused by the effects of temperature).
- Check PCCB brake discs while complying with the measuring prerequisites using VAS 6813 Tester for PCCB brake discs.
- It is no longer necessary to check the brake disc minimum thickness for this generation of brake discs.
Information
Checking thickness of brake pads
- If brake pad wear is indicated by the warning light, the warning contact (sender including wire and plug connection) must be replaced.
- Replacement of the warning contact can be avoided by replacing the brake pads before a pad thickness -Arrows- of 2.5 mm is reached.
- Warning contacts must be replaced if the core of the wire is worn.
- If only the plastic part of the warning contact is worn, the warning contacts can be re-used.
| Location | Description | Type | Basic value | Tolerance |
|---|---|---|---|---|
| Front brake pad thickness - Turbo/Turbo S | New | Dimension | 10.17 mm | |
| Front brake pad thickness - GT3 | New | Dimension | 10.38 mm | |
| Rear brake pad thickness - Turbo/Turbo S/GT3 | New | Dimension | 11.3 mm | |
| Check wear dimension of front and rear brake pads | Note wear indicator | Display in instrument cluster | Wear indicator | |
| Brake disc wear limit, front and rear | Measure using VAS 6813 Tester. Observe measuring prerequisites. New values/wear values and three measuring points are lasered onto the brake disc hub. If the wear value is reached: Replace PCCB brake discs on each axle. | Measured value | Read off values on the brake disc hub | |
| Thickness tolerance of brake disc | Maximum | Dimension | 0.01 mm | |
| Lateral runout of brake disc | Maximum | Measured value | 0.03 mm | |
| Lateral runout of wheel hub | Maximum | Dimension | 0.03 mm | |
| Lateral runout of brake disc when installed | maximum | Dimension | 0.07 mm |