Test Values And Wear Limits For Pccb (Cayenne Basic Model/Cayenne S/Cayenne Diesel/Cayenne Diesel S/Cayenne Hybrid/Cayenne Turbo/Cayenne Turbo S/Cayenne Gts)
WARNING: This page is about a different variant/trim than selected.
Information
From model year H, the 420-mm PCCB variant for 20-inch wheels (6-piston) will also be available as an option for the Cayenne, Cayenne S, Cayenne Diesel, Cayenne Diesel S and Cayenne Hybrid.
Information
The following condition criteria can make replacement necessary depending on the wear of the PCCB brake discs:
- Surface changes in the brake disc friction surfaces at an advanced stage.
- Minimum brake disc thickness is not retained due to wear (material erosion due to friction).
Information
The PCCB brake disc must not be machined.
| Location | Description | Type | Basic value | Tolerance |
|---|---|---|---|---|
| Pad thickness, front | Wear limit 2 mm | approx. 8.6 mm | ||
| Pad thickness, rear | Wear limit 2 mm | approx. 8.9 mm | ||
| Brake disc thickness, front | New | 40 mm | + 0.1 mm - 0.1 mm |
|
| Brake disc thickness, rear | New | 30 mm | + 0.1 mm - 0.1 mm |
|
| Brake disc wear limit, front | Brake disc minimum thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th. 37.7 mm | (Read value on brake disc hub) XX.X mm | ||
| Brake disc wear limit, rear | Brake disc minimum thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th. 29.7 mm | (Read value on brake disc hub) XX.X mm | ||
| Peak-to-valley surface roughness of brake disc | New | 0.006 mm | ||
| Wear limit: Surface changes in front and rear brake discs | Wear limit: Connected surface fracture > 1 cm2 and/or surface roughness of brake disc > 80 micrometer. Replace PCCB brake discs on both sides of the axle. | Values and procedure for: 46 51 02 Checking front PCCB brake discs/46 54 02 Checking rear PCCB brake discs. | ||
| Lateral runout of brake disc, maximum | 0.03 mm | |||
| Lateral runout of wheel hub, maximum | 0.02 mm | |||
| Lateral runout of brake disc when installed, maximum | 0.07 mm | |||
| Pushrod play | Not adjustable | |||
| Parking brake (foot-operated parking brake) | Drum brake acting mechanically on both rear wheels | |||
| Parking-brake drum Ø | Wear limit 211 mm | 210 mm | ||
| Brake shoe width | 30 mm | |||
| Brake pad thickness | Wear limit 1 mm | 3 mm |
Possible complaints
- Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.
Procedure:
- Check brake disc for minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.