463620 Removing and installing front brake pads - 6-piston fixed calliper

WM 463620 Removing and installing front brake pads - 6-piston fixed caliper

Tools






Preliminary work

- Remove wheel.
=> 440519 Removing and installing wheel.
=> 440519 Removing and installing wheel with central bolt.

Removing and installing front brake pads - 6-piston fixed caliper

Removing front brake pads - 6-piston fixed caliper

The core of the warning contact wire must not be left exposed. It does not matter if the insulation is worn.

Before removing the brake pads, a small amount of brake fluid must generally be removed by suction (from the reservoir) to prevent an overflow when pressing the brake pads back. This depends on the brake fluid level at the time and the amount of wear on the brake pads.





Brake fluid level

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 fixed 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 - 6-piston fixed caliper

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

- With the introduction of modified brake pads, the brake-piston damping plates (claw plates in the brake pistons) are no longer used. Refer to the Parts Catalogue for details of use/allocation.





Brake-piston damping plates (claw plates in the brake pistons) are no longer used

- The modified brake pads have a damping plate (on the brake-pad mounting plate) -1-. This damping plate -1- is covered with protective paper. Remove the protective paper completely before installing the brake pads.





Damping plate

Information

- Make sure that 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.

- The core of the warning contact wire must not be left exposed. It does not matter if the insulation is worn.

- Use new mounting parts.

- Remove some brake fluid from the brake fluid reservoir by suction if necessary.

1. Before installing the brake pads, check the amount of wear on the brake discs.
For details of minimum brake disc thickness, see => 4600TW Technical data/Brake wear limit - 911 Turbo/GT2/GT3/GT3RS.
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. Remove protective paper completely from the brake-piston damping plate (on the brake pad mounting plate) -1- before installing the brake pads.





Damping plate

4. Fit new disc brake pads.
5. Install expanding spring. Centre 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.).





6. Fit warning contact wire on the disc brake pads, expanding spring and brake caliper -arrows-.





Warning contact wire

7. Position disc brake pads by operating the brake several times.
8. Check the brake fluid level and correct it if necessary. The brake fluid level must be between the MIN/MAX marking.





Brake fluid level

Bedding in the brake pads

New brake pads require a bedding-in period of approx. 200 km. Only then do they achieve their maximum braking effect. The slightly reduced braking effect must be compensated for by increased pressure on the brake pedal. The same also applies after a brake disc change.

Subsequent work

- Install wheel.
=> 440519 Removing and installing wheel.
=> 440519 Removing and installing wheel with central bolt.