Note: The master cylinder is a unit in a non-separable housing and is not subject to repair. In case of failure of the master cylinder, the unit must be replaced. On models equipped with an anti-lock braking system, follow Chapter 28 before starting work.
1. Remove the filler cap of the reservoir, suck out the liquid using a syringe or flexible plastic bottle. Do not spill the liquid on the painted surface of the car. If the liquid is spilled, immediately rinse the area with plenty of cold water.
2. Install the filler cap, disconnect the signal lamp wiring.
3. Where available, disconnect the clutch hydraulic hose from the side of the reservoir (photo).
4. Place a rag under the cylinder, unscrew the brake line coupling nuts and disconnect the pipes from the master cylinder (photo).
5. Loosen the mounting bolts, remove the master cylinder from the power steering unit. Remove the O-ring. Do not press the brake pedal with the master cylinder removed.
6. Installation is carried out in reverse order, always install a new O-ring. Bleed the hydraulic system as described in Chapter 17.
[The article was copied from the website: AUDImanual.ru]