463520 Removing and installing rear PCCB brake pads
WM 463520 Removing and installing rear PCCB brake pads
Tools
Information on PCCB brake pads
Since the production launch, Pagid P40-2 brake pads with -brake-piston damping plates- have been fitted on the rear 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 -> 44051900 Removing and installing wheel 44051900 Removing and installing wheel.
Removing rear 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 retainer (securing clip) -Arrow- at the top of the retaining pin and move retaining pin -Direction arrow- inwards.
2. Remove warning contact wire (on the brake calipers, expanding spring and from the disc brake pads).
3. Remove expanding spring.
4. Brake piston resetting fixture NR.144, refer to Tools and Equipment, must be positioned on the brake caliper between the disc brake pads. Then push pads back evenly -Direction arrows-.
5. Remove disc brake pads.
Installing rear 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 retainer (securing clip) on the brake caliper.
- Do not grease the back of the disc brake pad.
- Check disc brakes for wear. For details of wear limits, see -> 4600TW Technical data/Brake wear limit.
- 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. -> 4600TW Technical data/Brake wear limit.
2. If necessary, push the brake pistons back into their original position using the brake piston resetting fixture NR.144, refer to Tools and Equipment.
3. Insert disc brake pads.
3.1. If you are using Pagid P40-2 brake pads, insert new damping plates into the pistons. Always remove the protective film on the damping plates before installation.
Damping plates in brake pistons
3.2. If you are using the modified brake pads (Pagid P40-3), do not fit any damping plates!
Damping plates no longer used
4. Fit expanding spring, retaining pin -Direction arrow- and new retainer (securing clip) -Arrow- at the top of the retaining pin.
Fit warning contact wire on the brake calipers -Arrow- , disc brake pads and expanding spring.
5. Position disc brake pads by actuating the brake several times.
6. 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 kilometres. 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 -> 44051900 Removing and installing wheel 44051900 Removing and installing wheel.