This article is one in a series that have been released in conjunction with Wayne's book, 101 Projects for Your Porsche 911. The book contains 240 pages of full color projects detailing everything from performance mods to changing your brake pads. With more than 650+ full-color glossy photos accompanying extensive step-by-step procedures, this book is required reading in any Porsche 911 owner's collection. See The Official Book Website for more details.
If your parking brake is not functioning properly, then perhaps it's time that you replaced your parking brake shoes. The first step in the process is to make sure that your parking brake cables and handles are adjusted properly. Refer to Project 50 for details on this procedure.
The parking brake shoes can only be inspected after the removal of the rear brake discs. Refer to Project 47 for the procedure for this removal. After you have the brake discs off, you can visually inspect the shoes for wear. The shoes should have some brake lining along the top, and should not have any heavy grooves cut into them. Compare your brake shoes to the new shoes shown installed in the pictures in this project to determine if you need to replace yours.
After the brake disc has been removed from the brake assembly, remove the small parking brake adjuster by prying it out from between the upper and lower parking brake shoe. Make sure that the parking brake handle is all the way down for this procedure. Be careful while you are performing this removal, as the adjuster is spring loaded and the springs may fly out when you are prying it out.
When you have removed the adjuster, take a set of needle nose pliers and remove the long spring that that holds the upper and lower shoes together near where the adjuster was mounted. Again, be careful of the spring, as it may fly off unexpectedly. Make sure that you wear safety glasses during this entire procedure.
Now, remove the washer and conical spring retaining mechanism at the top of the assembly. Press in the spring, and then rotate the special spring washer so that you can slide it out of its retainer. Make sure that you don't lose the parts if they happen to fly out.
Move to the front of the brake assembly (towards the front of the car), and remove the long spring from the two brake shoes. Use the needle nose pliers again, and be careful not to catch your fingers in the process.
After the three springs have been removed from the parking brake assembly, both the top and the bottom shoes should simply lift off of the assembly. The new shoe should be installed in an opposite manner to the removal process. Reassemble the parking brake by attaching the long spring towards the front of the car first, then the upper conical spring, and then the spring towards the rear. When you are finished, test the assembly by operating the emergency brake handle a few times. Carefully check the springs and make sure that they are properly seated in the restraining holes in the brake shoes.
Reinstall the brake disc, and make sure that you recheck and adjust the parking brake mechanism (Pelican Technical Article: Parking Brake Adjustment) before you reinstall the caliper and the brake pads.
Remove the small adjusting cog assembly by using a large screwdriver to push it out from between the two parking brake shoes. With some effort, the cog assembly should pop out, leaving a little bit of slack between the two parking brake shoes.
Using a pair of pliers, grab and unhook the parking brake spring from the brake shoes. Be careful of the spring, as it is under a lot of tension at this point. Also undo the small spring retainer (indicated by the arrow) that secures the brake shoes to the rear trailing arm. Use a pair of vise grips and a pair of needle-nose pliers to twist the spring and unlatch it from the assembly.
The final assembly with the new brake shoe is shown here. Be very careful when installing the new shoe, as the retaining springs have a tendency to snap out of place and fly out. Make sure that you keep your hands out of the way, and use safety glasses when installing or removing the springs.