Test Values And Wear Limits For Macan Brake System
WARNING: This page is about a different variant/trim than selected.
Information
Depending on the wear of grey cast-iron brake discs, two condition criteria can make replacement necessary:
- Advanced stages of cracking on the brake disc friction surfaces.
- Minimum brake disc thickness is not retained due to wear (material erosion due to friction).
> 465002 - CHECKING FRONT BRAKE DISCS (GREY CAST IRON)
| Location | Description | Type | Basic value | Tolerance |
|---|---|---|---|---|
| Pad thickness, front | Wear limit 2 mm | Pad quality, ECE | 9.48 mm | |
| Pad thickness, front | Wear limit 2 mm | Pad quality, NAR | 9.68 mm | |
| Pad thickness, rear | Wear limit 2 mm | 11.6 mm | ||
| Brake disc wear dimension, front | 34 mm | |||
| Brake disc wear dimension, rear | 20 mm | |||
| Lateral runout of brake disc, max. | 0.03 mm | |||
| Lateral runout of wheel hub, max. | 0.03 mm | |||
| Lateral runout of brake disc when installed, max. | 0.06 mm |
- Damage due to lack of use (rusting). This causes vibrations in the steering wheel, noises and brake pedal pulsation.
- 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, minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.
- If necessary, (depending on the actual brake disc thickness and the brake disc wear limit) machine the brake disc using one of the disc brake dressing machines approved by Porsche. For a list of recommended disc brake dressing machines, see appropriate service information.
- The brake disc must only be reworked symmetrically, i.e. evenly from both sides! Read the operating instructions for the disc brake dressing machine!