Parking Brake Shoe: Service and Repair
Removal
1. Remove the rear wheel. Open the plug connection on the wheel carrier and pull out the plug for the brake pad wear indicator. Unclip the electrical wire on the spring strut.
2. With a screwdriver, turn the adjustment device towards "release" through a wheel bolt threaded hole.
3. Remove the brake caliper from the wheel carrier and suspend it in the wheel arch (do not open brake hydraulics. Undo the holder for the brake hose/brake line on the wheel carrier).
4. Take off the brake disc after removing the countersunk screws (arrows).
5. Remove compression springs, adjustment fixture and return spring. Remove parking brake shoes and return spring.
Installation
Note The brake shoe adjustment device (No. 2) of the Boxster has a finer toothing than the Boxster S. The parking brake shoes and the return springs are also different.
1. Lightly grease the adjustment device (No. 2), pins on the actuating lever (spreading lever) and the sliding surfaces of the parking brake shoes.
2. Install the actuating lever (spreading lever), brake shoes, return springs, compression springs and adjustment device.
Note Ensure that the hooks (curved spring ends) of the compression springs (No. 6) are correctly positioned on the wheel carrier (if necessary, check with the aid of a mirror).
3. Again check to ensure that the parking brake shoes, adjustment device, return springs, compression springs and spreading lever are positioned correctly, and adjust if necessary.
4. Clean the levelling and centering surfaces on the brake disc and wheel hub. Then apply a very thin coat of Optimoly TA to the centering surface on the wheel hub.
5. Fit the brake disc.
Note The right and left brake discs are the same part.
^ Boxster: internally ventilated brake discs ([diameter] 292 mm / new thickness 20 mm)
^ Boxster S: internally ventilated and perforated brake discs ([diameter] 299 mm / new thickness 24 mm)
6. Adjust the parking brake shoes and the parking brake cables. Fit the brake caliper. Tightening torque of the fastening screws: 85 Nm (63 ft. lbs.). Use new fastening screws.