Grinding Down Parking-Brake Shoes
Information
- Grinding down applies only to grey cast-iron brakes with one-piece brake discs .
- Grinding of grey cast-iron brakes on the Cayman GT4 (981) is not permitted because compound brake discs with aluminum brake disc hubs are installed .
- Grinding of PCCB brake discs/brake shoes is not permitted .
- Grinding must be performed after setting the brake shoes to the basic setting .
- The brake shoes must be ground down prior to calibration .
- It is not necessary to grind down the parking-brake shoes when you are removing/installing the brake discs and/or parking-brake shoes .
Information
- Each time the brake discs and/or parking-brake shoes (grey cast-iron brakes only) are replaced, the electric parking brake (EPB) must be ground down after first setting the brake shoes to the basic setting → 468316 ADJUSTING PARKING-BRAKE SHOES . This does not apply to compound brake discs with aluminum brake disc hubs (Cayman GT4) .
- The electric parking brake will only function fully after it has been ground down and calibrated. This involves driving the vehicle eight times from standstill to 10 km/h (6 mph) up to max. 20 km/h (12 mph) for a distance of 20 meters. If the distance in meters is not sufficient for several consecutive cycles, you can perform a reset with the vehicle after every cycle and drive on the same stretch of road several times!
- The >>Grind brake shoes<< routine is initiated using PIWIS Tester II 9818 .
- Select >>Parking brake<< in the control unit overview. Select >>Maintenance/repairs<< >>Grinding<<. Follow the instructions on PIWIS Tester II.
- Once the brake shoes have been ground down correctly, the electronic parking brake must be calibrated. → 468316 ADJUSTING PARKING-BRAKE SHOES