Adjusting The Parking-Brake Shoes: Notes

Information 

• The electric parking brake with asbestos-free brake pads must never be adjusted in such a way that the pad has to grind free during operation.  → 468350 GRINDING DOWN PARKING-BRAKE SHOES 
• Adjustments must only be carried out at the two rear wheel adjustment devices  .
• Make sure that the EPB cables are routed and guided correctly  .

The rear wheels must be removed in order to access the adjustment device. → 440519 REMOVING AND INSTALLING WHEEL

In the event of unfavorable tolerances, the brake pads may prevent the brake disc from turning freely. If this happens, the brake pads must be pressed back slightly and uniformly using a water pump pliers.

1. Raise the vehicle. → 4X00IN LIFTING THE VEHICLE
2. Release the EPB so that the wheels and brake discs can turn freely.
3. Move the brake shoes into installation position using PIWIS Tester II 9818  . Select >>Parking brake<< in the control unit overview. Select >>Drive links/checks>>All<< >>Move to installation position<<.
4. Adjust brake shoes (on both wheels). To do this, turn the relevant rear wheel with the opening to the adjustment device position. Using a screwdriver, adjust the adjustment device until the wheel can no longer be turned. The subsequent torque of the wheel must be greater than 100 Nm (74 ftlb.). Then loosen the adjustment device by 14 clicks (wheels must be able to turn freely).
5. Using PIWIS Tester II, select >>Parking brake<< in the control unit overview. Select >>Maintenance/repairs<< >>Check parking brake basic setting<<.

It may be necessary to fine-tune the adjustment device after selecting >>Check parking brake basic setting<<.

Adjustment dimension = required dimension - actual dimension  (required dimension minus actual dimension)

Fig 1: Adjusting Parking-Brake Shoes Using Left Adjustment Device

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 2: Adjusting Parking-Brake Shoes Using Right Adjustment Device

Courtesy of PORSCHE CARS NORTH AMERICA, INC.