W/ 23.81 mm (0.937) Piston Diameter

Brake master cylinder with 23.81 mm (0.937 inch) diameter piston, removing and installing

Special tools and equipment
Sealing plugs from repair kit, Part No. 1H0 698 311A

CAUTION: Part numbers are listed here for reference only. Always check with your Parts department for the latest information.

Removing
- Attach bleeder hose and bleeder bottle to left-front brake caliper bleeder screw and open bleeder screw.
- Operate brake pedal to pump out as much brake fluid as possible.
- Close left-front bleeder screw.
- Cover engine compartment to catch any spilled brake fluid.

CAUTION: Brake fluid must not be allowed to come into contact with paint work because of its caustic effect.





- On vehicles with manual transmission, disconnect clutch master cylinder supply hose -1- and seal with plug.
- Disconnect harness connector from brake fluid level warning switch -2-.





- Disconnect brake lines -1- on brake master cylinder and seal brake lines and threaded holes using plugs from repair kit.
- Remove brake master cylinder mounting nuts -2-.
- Carefully remove brake master cylinder from brake servo.

Installing
When installing, note the following points:
- When installing brake master cylinder onto brake servo, 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 US1116 brake bleeder but do not switch on yet.
- Open bleeder screw on clutch slave cylinder.
- Attach collector bottle hose.
- Switch on bleeder unit and allow approx. 100 cc (6 oz.) of brake fluid to flow out of clutch slave cylinder.
- Close bleeder screw.
- Bleed brake system. Refer to Brake hydraulic system, bleeding and changing brake fluid.