Brake Master Cylinder With Brake Booster

Brake Master Cylinder with Brake Booster

Special tools, testers and auxiliary items required

• Release tool (T40024)

• Sealing plug repair kit (1H0 698 311 A)

Removing

- Remove the glove compartment on driver's side. Refer to

- Rotate the brake light switch - 1 - 45 degrees to left and remove.





- Use release tool (T40024) to separate the brake pedal from the brake booster.





Extracting brake fluid using brake filler/bleeder unit (VAS 5234)

- Remove the plenum chamber cover.

- Lay out sufficient lint free cloths in the area of the plenum chamber.





- Open the brake fluid reservoir.

- Extract the brake fluid.





- Disconnect the connector from the float warning indicator sensor - 1 -.





- Disconnect the vacuum hose - 2 -.

- Remove the bolt - 1 - for the brake fluid reservoir.





• Protect the plenum chamber against any leaking brake fluid.

• The underside of the brake fluid reservoir clips into the brake master cylinder.

- To remove the reservoir, press the locking tab down and at the same time, remove the brake fluid reservoir from the sealing plugs.

- Remove the brake fluid reservoir and lay it to one side.

- Disconnect the brake lines - 1 - and - 2 - and seal with sealing plugs from sealing plug repair kit (1H0 698 311 A).





- Lay out sufficient lint free cloths in the area of the hydraulic control unit.

- Disconnect the brake lines - 1 - and - 2 - and remove together with the rubber grommet.





- Remove the brake booster bolts - 1 - ( (T45 ) Torx).





- Remove the brake booster with brake master cylinder.

On vehicles installed with a cross brace the cross brace must be removed.

- Removing and installing cross brace. Refer to => Steering and Suspension Steering and Suspension

- Remove the nuts for the brake master cylinder - 1 -.





- Carefully remove the brake master cylinder from the brake booster.

Installing

When installing, note the following points:

• Clean any residual brake fluid off the plenum chamber before installing the brake master cylinder.

• When assembling the brake master cylinder with the brake booster unit, make sure the push rod is properly positioned in the brake master cylinder.

- Adjust the brake light switch.

- Bleed the brake system. Refer to => [ Brake System Bleeding ] Brake System Bleeding.