Master Brake Cylinder

Master Brake Cylinder

Special tools, testers and auxiliary items required

• Brake Charger/Bleeder Unit (VAS 5234)

• Torque Wrench 5-50 Nm (V.A.G 1331)

Removing

- Note or request radio code on vehicles with coded radio if necessary.

- Disconnect battery.

- Remove and install the battery.

An exception is the V6 Eos; in this case remove the air filter housing.

- Remove the battery casing.

- Place sufficient lint-free cloths in the area of the engine and transmission.

- Extract as much brake fluid as possible from brake fluid reservoir using (VAS 5234) or extraction device (V.A.G 1869/4).

For Vehicles with Manual Transmission

- Disconnect the clutch slave cylinder return hose - B - and secure it out of the way or clamp it off with a commercially available tool such as the Hazet 4590 and then remove it.






All Vehicles

- Disconnect connector - A - from floating warning indicator sensor.

- Disconnect the connector from the brake lamp switch (only on vehicles from calendar week 45/05).

- Remove brake fluid reservoir, press the engagement straps toward outside at reservoir and simultaneously pull brake fluid reservoir out of sealing plugs.






- Disconnect the brake lines - 1 - at the brake master cylinder and seal the lines with sealing plugs from repair kit Part No. 1H0 698 311 A.

- Remove the nuts - 2 - from master brake cylinder.

- If present, remove heat shield.

- Carefully take brake master cylinder out of brake booster.

Installing

- Install in reverse order of removal.

Observe the following points when installing:

- When installing together the brake master cylinder and brake booster, make sure that the push rod is correctly located in the brake master cylinder.

- Bleed brake system, refer to => [ Brake System, Bleeding ] Brake System, Bleeding.