463456 Replacing front PCCB brake pads
WM 463456 Replacing front PCCB brake pads
Tools
Information
Note on pictures shown
Information
- The pictures shown in this document may differ from the original.
- However, this does not affect the validity and relevance of the pictures.
Preliminary work
Lift the vehicle.
-> 4X00IN Lifting the vehicle Service and Repair.
Remove wheel. Use assembly aids (assembly pins) -1-.
-> 44051900 Removing and installing wheel.
PCCB brake disc and caliper
Removing front brake pads
NOTICE
Removing/fitting wheels
- Risk of damage to (ceramic) brake discs
-> Use two assembly pins when removing and fitting the wheel.
-> Carefully guide the wheel towards the wheel hub, thereby preventing any heavy impact on the (ceramic) brake disc.
1. Screw the two assembly aids (assembly pins) -1- , instead of two wheel bolts, into the wheel hub before removing/fitting the wheel. During removal, first remove the three remaining wheel bolts and remove the wheel carefully without touching the brake discs.
Front-axle PCCB brake disc with caliper and assembly aids 1 (threaded bolts for fitting wheel)
2. Then (after removing the wheel), remove the two assembly aids (assembly pins) -1- again.
Information
- To gain better access for assembly work, it is a good idea to turn the wheels fully either to the right or left!
3. Release and unclip the connector for the brake pad wear indicator -1 und 2-.
Connector, brake pad wear indicator
4. Detach line for brake pad wear indicator from brake caliper.
5. Disconnect plug connection for speed sensor.
NOTICE
Removal of brake caliper
- Paint defects on brake caliper
-> Proceed with care when setting back the brake pads.
-> Protect brake caliper from paint defects using a suitable cloth.
6. Carefully set the disc brake pads back slightly and uniformly using water pump pliers.
Information
- Do not open the brake system.
- Do not loosen the brake hose from the brake caliper when loosening the brake caliper.
- The core of the warning contact wire must not be left exposed! It does not matter if the insulation is worn.
- 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.
7. Partially remove brake caliper. Use removal/installation aid for brake caliper assembly pin T10439.
Assembly pin for brake caliper
Information
- Never use an impact bolter to loosen and tighten the brake caliper on the wheel carrier.
7.1. Remove upper brake caliper fastening screw -Bewegungspfeil oben- and install assembly pin => Assembly pin for brake caliper fitted.
Brake caliper fastening screws
7.2. Remove lower brake caliper fastening screw -Bewegungspfeil unten- and install assembly pin => Assembly pin for brake caliper fitted.
Assembly pin for brake caliper fitted
7.3. Pull brake caliper out of installation position until brake caliper engages in recesses of assembly pin => Brake caliper tool installed. Carefully guide brake line and brake hose along with caliper in the process.
Brake caliper tool installed
8. Position brake piston with piston resetting fixture (replaces P83) Nr.144, refer to Tools and Equipment, on brake caliper between the disc brake pads. Then press the brake pads evenly => Pressing back brake pads.
Pressing back brake pads
Information
If the disc brake pads are still to be used, mark their installation position.
9. Carefully push a commercially available screwdriver between the disc brake pad/brake caliper and lever the disc brake pad out by turning the screwdriver slightly. When doing this, make sure not to damage the dust boots on the brake pistons -Bewegungspfeile-.
Removing brake pads, brake caliper removed in illustration for the sake of clarity
10. Remove pad retaining springs.
Installing front brake pads
WARNING
Old mounting parts fitted on the brake caliper
- Reduced braking effect
- Risk of damage to the brake caliper
-> Fit new pad retaining springs
-> Fit new fastening screws
WARNING
Installation of brake pads with the wrong brake pad quality
- Longer braking distance
- More wear on brake pads
-> Only use the type-specific brake pads listed in the Porsche Parts Catalogue.
-> Replace the brake pads when the brake pad wear indicator light comes on, but no later than when there is a residual pad thickness of 2 mm on each axle.
-> Replace the brake discs on each axle as soon as the brake pad wear limit is reached.
Information
- The back of the pad backing plates must not be greased.
- Check disc brakes for wear. For details of wear limits see -> 465102 Checking front PCCB brake discs (wear assessment) 465102 Checking front PCCB brake discs (wear assessment).
- Disc brakes must be clean and free of grease.
- The core of the warning contact wire must not be left exposed! It does not matter if the insulation is worn.
- 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.
- Use new repair kit.
- Observe correct tightening torques -> 4X00IN Tightening torques for the brake hydraulic system [1][2]Hydraulic System, Brakes.
1. Fit new pad retaining springs.
2. Place the disc brake pad onto the sealing surfaces of the pad retaining springs -arrows-.
Fitting brake pad
3. Press the brake pad into the brake caliper with slight pressure and slide it onto the pad retaining pins -arrows-.
Positioning brake pad
4. Fit the disc brake pad -direction arrows-.
Fitting brake pad
5. Install the brake caliper in reverse order to removal.
6. Position disc brake pads by operating the brake several times.
7. Check the brake fluid level and correct it if necessary.
-> 470801 Checking brake fluid level
Subsequent work
1. Fit the wheel. Use assembly aids (assembly pins) -1-. -> 44051900 Removing and installing wheel
PCCB brake disc and caliper
Information
Bedding in the brake pads
New brake pads require a bedding-in period of approx. 200 km (125 miles) Only then do they achieve their best friction and wear coefficient! During this period, the brakes should only be subjected to full stress at high speed in emergencies!