46381900 Removing and Installing Rear Disc Brake Pads
WM 463819 Removing and installing rear disc brake pads
Removing rear disc brake pads
1. Remove the safety bracket and extract the retainer pin inwards -arrows-.
Removing retainer pin
2. Pull out the warning contact wire on the brake caliper and remove the warning contacts from the brake pad plates.
Contrary to the illustration, there are no vibration balancers on the brake pads.
3. Remove 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 the brake pads together with the brake-piston damping plates (if present/Boxster S only). If this is not possible (depending on the amount of wear on the brake pads), use a spatula to detach the vibration dampers 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 caliper.
- This can cause malfunctions.
-> Fit new expanding spring, new retainer pin and new retainer on the brake caliper.
Information
The brake pad backing plates (rear side) must not be greased.
Replace the brake-piston damping plates (if present/Boxster S only) each time that you change the brake pads.
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 installation of the brake pads, check the wear of the brake discs. For details of the minimum thickness of the brake discs, see Technical data/Brake wear limit in Repair Group 46.
2. If necessary, reset the brake pistons using the piston resetting fixture.
3. Insert new brake-piston damping plates (if fitted/Boxster S only) into the pistons. Since the brake-piston damping plates are covered by a protective film, the protective film must be removed before installation. => Damping plate
Damping plate
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.
4. Insert brake pads.
CAUTION
Increased risk of accidents if old parts are fitted on brake caliper.
- This can cause malfunctions.
-> Fit new expanding spring, new retainer pin and new retainer on the brake caliper.
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 the warning contacts.
7. Press 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. 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.