Grinding Down Parking-Brake Shoes

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2019 Porsche 911, 2018 Porsche 911, 2017 Porsche 911, 2016 Porsche 911, and 2015 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Information

Grinding down applies only to grey cast-iron brakes with one-piece brake discs.
Grinding of grey cast-iron brakes on 911 Turbo (991) and 911 GT3 (991) vehicles 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 grinded 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 grinded 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 (911 Turbo and 911 GT3).
The electric parking brake will only function fully after it has been grinded 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 grinded down correctly, the EPB must be calibrated. → 468316 ADJUSTING PARKING-BRAKE SHOES