Removing and Installing Front PCCB Brake Pads
WM 463420 Removing and installing front PCCB brake pads
Information on PCCB brake pads
Since the production launch, Pagid P40-2 brake pads with -brake-piston damping plates- have been fitted on the front axle for PCCB brakes.
Damping plates in brake pistons
With the introduction of modified brake pads - Pagid P40-3 - the brake piston damping plates are no longer used (refer to the Parts Catalogue for information on use/allocation).
Some brake-piston damping plates are no longer used
Preliminary work
Remove wheel.
Removing front brake pads - PCCB brakes
The core of the warning contact wire must not be left exposed. Worn insulation is not important.
If necessary, remove a little brake fluid from the reservoir by suction in order to prevent an overflow when the disc brake pads are pushed back!
1. Remove fastening screw at the retaining pin. Then screw the M8 auxiliary screw into the retaining pin. Hold down the expanding spring with a screwdriver and remove retaining pin.
2. Remove warning contact wire at the brake caliper and expanding spring. Remove warning contacts from the disc brake pads.
3. Brake piston resetting fixture 9472 (for 6-piston brake caliper) must be positioned on the brake caliper between the disc brake pads. Then press the pads back evenly -Direction arrows-.
4. Remove disc brake pads.
Removing brake pad
Installing front brake pads - PCCB brakes
Warning
Danger of accidents if brake pads of the wrong quality are installed.
^ This can result in longer braking distances and more wear.
--> Use only the type-specific brake pads in the Porsche Spare Parts Catalogue.
Warning
Danger of accidents if old parts are fitted on brake caliper.
^ This can cause malfunctions.
--> Fit new expanding spring, new retaining pin and new retaining pin screw on the brake caliper.
^ Make sure the retaining pin is inserted at the correct position. The side levelling surfaces prevent the retaining pin from twisting in the brake caliper.
^ Do not grease the back of the disc brake pad.
^ Check disc brakes for wear.
^ The core of the warning contact wire must not be left exposed. Worn insulation is not important.
^ Use a new repair kit.
1. Before fitting the brake pads, check the brake discs for wear.
2. If necessary, push the brake pistons back into their original position using the brake piston resetting fixture 9472 (for 6-piston brake caliper).
Brake piston resetting fixture
3. Fit new disc brake pads.
3.1. If you are using Pagid P40-2 brake pads, fit new brake-piston damping plates in the pistons.
Always remove the protective film on the damping plates before installation. When fitting the damping plates on the small pistons, position the cut-out on the damping plate at the brake pad guide pin because otherwise the damping plate will be deformed.
Damping plates in brake pistons
3.2. If you are using the modified brake pads (Pagid P40-3), do not fit any damping plates!
Brake-piston damping plates no longer used
4. Fit expanding spring. Center the retaining pin in the bore using the M8 auxiliary screw. To do this, push the retaining pin back with the auxiliary screw and then push the retaining pin through. Remove auxiliary screw and tighten new fastening screw at the retaining pin to 30 Nm (22 ftlb.).
5. Fit warning contact wire on the disc brake pads, expanding spring and brake caliper -Arrows-.
6. Position disc brake pads by actuating the brake several times.
7. Check brake fluid level and correct if necessary. The brake fluid level must be between the MAX-MIN marking.
Brake fluid level
Bedding in the brake pads
New brake pads require a slightly longer bedding-in period for PCCB brake discs than cast iron brake discs.
In general, the following applies: New brake pads must be worn in (bedding-in period), their optimum braking effect is not reached until after a few hundred kilometers. The slightly reduced braking effect must be compensated for by increased pressure on the brake pedal. The same also applies after changing brake discs.
Subsequent work
Fit wheel.