463619 Removing and Installing Front Disc Brake Pads
WM 463619 Removing and installing front disc brake pads
Tools
Removing front brake pads
1. Remove wheel. -> 44051900 Removing and installing wheel 44051900 Removing and installing wheel.
2. Remove the safety bracket and extract the retaining pin inwards.
Removing retaining pin
3. Pull out the warning contact wire on the brake caliper and remove the warning contacts from the brake pad plates.
4. Remove brake pads using the brake pad puller. Always observe the following important points:
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.
Press the brake pads back as far as possible using the piston reset tool. Piston reset tool Nr.144.
Pull out brake pads together with the vibration dampers. 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 before removing the pads.
Installing front disc brake pads
Information
- 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.
- Brake pad wear indicator: Replace warning contacts if the core of the warning contact wire is worn. Worn insulation is not important.
- The warning contact can still be used if there are only scrape marks on the plastic part of the warning contact.
- There are two types of warning contacts (integrated differently in the brake pad). Distinguishing feature: Wear pill (wear sensor) of warning contact is either shaped like a pin or is flat with a spring clip attachment.
1. Check the following before installing the brake pads:
- Check the amount of wear on the brake discs (minimum brake disc thickness). -> 4600TW Technical data/Brake wear limit.
- The warning contacts must also be replaced in some cases (when installing a different type of brake pad for the first time). This relates to warning contacts with pin-shaped wear pills or switching to flat wear pills with a spring clip attachment for the Boxster S and Cayman S.
2. Reset the brake pistons using the piston reset tool No. 144 if necessary. Remove a little brake fluid from the reservoir by suction if necessary in order to prevent an overflow.
3. Fit new vibration dampers in the pistons. Remove protective film from the vibration dampers before installation.
Vibration damper
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.
WARNING
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
9. Install wheel. -> 44051900 Removing and installing wheel 44051900 Removing and installing wheel.
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.