Removing and Installing Rear Disc Brake Pads

WM 463820 Removing and installing rear disc brake pads





Preliminary work
Remove wheel.

Removing rear disc brake pads
1. Take off the securing clip and remove the retaining pin by pulling it inwards. -Arrows-





2. Pull out the warning contact wire on the brake calliper and remove the warning contacts from the brake pad plates.
3. Pull out the brake pads using the brake-pad puller. Always observe the following important points:

Press the brake pads back as far as possible using the piston resetting fixture.

Pull out brake pads together with the damping plates. If this is not possible (depending on the amount of wear on the brake pads), use a spatula to detach the damping plates from the brake pad backing plate.

Installing rear disc brake pads

Warning: Risk of accidents if brake pads with the wrong brake pad quality are installed.
^ This can result in longer braking distances and more wear.

-> Use only the type-specific brake pads specified in the Porsche Spare Parts Catalogue.

Caution: Increased risk of accidents if old parts are fitted on brake calliper.
^ This can cause malfunctions.

-> Fit new expanding spring, new retainer pin and new retainer on the brake calliper.

Note: The brake pad backing plates (rear side) must not be greased.

Replace vibration dampers each time the pads are changed.

The vibration dampers have an adhesive protective film. The protective film must be removed before installation.

Replace warning contacts if the core of the wire is worn.

The warning contact can still be used if there are only scrape marks on the plastic part of the warning contact.

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

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 NR.144.
3. Fit new damping plates in the pistons. Always remove the protective film on the damping plates before installation.





4. Insert the brake pads.
5. Fit new expanding spring, new retaining pin and new retainer. These parts are available as a repair kit and must be replaced each time the pads are changed.
6. Insert the warning contact wire and warning contacts.
7. Actuate the brake pedal several times to position the brake pads on the brake discs.
8. Check the brake fluid level and correct it if necessary.





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
Fit wheel.