Removing Brake Booster

WARNING: Danger of injury and damage from brake fluid!

Poisonous if swallowed!
Irritation and damage to skin
Avoid contact with paint surfaces
→ Store brake fluid in suitable, labelled containers only

→ Wear protective gloves and goggles

→ In the event of contact (eyes or skin), wash immediately with water

→ In the event of contact with paint surfaces, wash off immediately with water - do not wipe off

Information

When carrying out work during which fluids can escape, electric plug connections to be disconnected must remain locked and connected for as long as possible. This prevents fluid from getting onto electric contacts and causing corrosion.

Information

Brake fluid - even thinned brake fluid - causes corrosion on electric contacts, thereby impairing functions.

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The brake booster is removed together with the brake master cylinder and brake fluid reservoir.

Information

Any escaping brake fluid must be removed immediately. If necessary, rinse contacts with water and dry them.

Drain the brake fluid reservoir.
1. 1.1 Unscrew cap on brake fluid reservoir.
2. 1.2 Extract brake fluid from brake fluid reservoir using a syringe.
3. 1.3 Open cap on brake fluid reservoir.
4. 1.4 Remove any emerging brake fluid immediately, clean affected components with water and dry them.
Have stoppers ready for closing off the connection openings.
Place suitable material underneath for catching emerging brake fluid.
Disconnect brake fluid reservoir connections -1 and 2- .
1. 4.1 Release and disconnect electric plug connection -1- .
2. 4.2 Place suitable material underneath the brake fluid reservoir to soak up escaping fluids.
3. 4.3 Release and disconnect brake pressure line -2- .
4. 4.4 Close off brake pressure line -2- using a stopper.
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Electric plug connection and brake pressure line
Disconnect brake lines -1- at the brake master cylinder -2- .
1. 5.1 Place suitable material underneath the brake master cylinder -2- to soak up escaping fluids.
2. 5.2 Unscrew union nuts on brake lines -3- and pull brake lines -1- out of the brake master cylinder -2- .
3. 5.3 Close off line connections using stoppers and move brake lines -1- aside carefully.
4. 5.4 Close off connections using stoppers.
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Brake lines
Release and disconnect electric plug connections for brake booster -1 and 2- .

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Electric plug connections for brake booster
Disconnect brake pedal -1- from brake booster push rod -2- .
1. 7.1 Press the brake pedal -1- towards the brake booster with your hand -arrow A- .
2. 7.2 > 9767 - Release tool must be fitted on the retaining lugs of the ball joint mounting -3- . Also place a plastic block with a height of approx. 5 cm between > 9767 - release tool and bulkhead.
3. 7.3 Release retaining lugs on the ball joint mounting -3- by moving them towards the driver seat using > 9767 - release tool (-arrow B- ) and counter at the brake pedal -1- at the same time (the brake pedal must not move towards the driver seat -arrow B- ).
4. 7.4 Separate the brake pedal -1- together with > 9767 - release tool from the brake booster push rod -2- by moving it towards the driver seat -arrow B- .
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Brake booster push rod on brake pedal
Unscrew nuts -1- from brake booster -2- .

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Nuts on brake booster
Remove brake booster -1- .
1. 9.1 Carefully remove brake booster push rod in direction of -Arrow- .
2. 9.2 Guide brake booster -1- up out of the plenum panel.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Brake booster