463819 Removing and installing rear brake pads
WM 463819 Removing and installing rear brake pads
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Note on pictures shown
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- 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
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- 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.
Lift the vehicle.
-> 4X00IN Lifting the vehicle Service and Repair.
Remove the wheel. Use assembly aids (assembly pins) -1-.
-> 44051900 Removing and installing wheel.
Brake disc and caliper (shown as an example)
Removing rear brake pad
Removing rear disc 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.
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.
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 brake disc with caliper and assembly aids 1 (threaded bolts for fitting wheel), shown as an example
2. Then (after removing the wheel), remove the two assembly aids (assembly pins) -1- again.
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Protect the paintwork on the brake caliper from damage using a suitable cloth.
3. Carefully press the brake pads back using water pump pliers.
4. Release and unclip the connector for the brake pad wear indicator and remove it from the holder -arrow-.
Unclipping cable
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- Never use an impact bolter to loosen and tighten the brake caliper on the wheel carrier.
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- Do not open the brake system.
- Do not loosen the brake hose from the brake caliper when loosening the brake caliper.
5. Get the transmission jack ready for the brake caliper and loosen the brake caliper => see figure.
Removing brake caliper (shown as an example)
6. Place the brake caliper on the transmission jack => Setting down brake caliper (shown as an example).
Setting down brake caliper (shown as an example)
7. Carefully slide a commercially available screwdriver between the brake pad/brake caliper and lever the brake pad out by turning the screwdriver slightly. When doing this, make sure not to damage the dust boots on the brake pistons -arrows-.
Removing rear-axle brake pads (shown as an example)
8. Remove pad retaining springs.
Installing
Installing rear disc brake pads
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.
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
Information
- The back of the pad backing plates must not be greased.
- Check disc brakes for wear. For details of wear limits see -> 465302 Checking rear brake discs (wear assessment) 465302 Checking rear 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.
Installation is performed in reverse order.
1. Fit new pad retaining springs.
2. Place the disc brake pad onto the sealing surfaces of the pad retaining springs.
Fitting brake pad (shown on front axle as an example)
3. Press the brake pad into the brake caliper with slight pressure and slide it onto the pad retaining pins. -arrows-
Positioning brake pad (shown on front axle as an example)
4. Fit the brake pad. -direction arrow-
Fitting brake pad (shown on front axle as an example)
5. Fit the brake caliper and check that the brake hose is routed correctly (do not twist the brake hose!).
-> 474119 Removing and installing rear brake caliper 474119 Removing and installing rear brake calliper
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 Service and Repair
Subsequent work
1. Fit the wheel. Use assembly aids (assembly pins) -1-. -> 44051900 Removing and installing wheel
PCCB brake disc and caliper (shown as an example)
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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!