Brake Master Cylinder, Removing and Installing

Brake master cylinder, removing and installing

Special tools and equipment
^ Sealing plugs from repair kit, Part No. 1 HO 698 311 A

Removing
- Attach bleeder hose of bleeder bottle to left-front brake caliper bleeder valve and open bleeder valve.
- Operate brake pedal to pump out as much brake fluid as possible.
- Close left-front bleeder screw.

Note: Cover engine compartment to make sure that brake fluid does not flow into it.





- Disconnect clutch master cylinder supply hose -1- and seal with plug.
- Disconnect harness connector for brake fluid level warning switch -2-.





- Disconnect brake lines -1- on brake master cylinder and seal brake lines using plugs from repair kit, Part No. 1 HO 698 311 A.
- Remove brake master cylinder nuts -2-.
- Carefully remove brake master cylinder from brake booster.
When installing, pay particular attention to the following points
- When installing brake master cylinder onto brake booster, make sure push rod is correctly located in brake master cylinder.
- Apply slight pressure to brake pedal to move push rod toward brake master cylinder; this makes it easier to guide brake master cylinder onto push rod.
Bleeding clutch hydraulics:





- Connect VAS 5234 but do not switch on yet.
- Open bleeder valve on clutch slave cylinder.
- Attach collector bottle hose.
- Switch on bleeder unit and allow approximately. 100 cc of brake fluid to flow out of clutch slave cylinder.
- Close bleeder screw.