Master Brake Cylinder: Installing

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Audi S4, 2013 Audi A4, 2012 Audi S4, 2012 Audi A4, and 2011 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

Install in reverse order of removal.

CAUTION:

Do not let any brake fluid run into the brake booster.

Use new nuts.

-- Replace sealing ring between brake master cylinder and brake booster.

-- When replacing brake master cylinder, ensure pressure rod in brake booster is seated correctly.

-- Press brake pedal down slightly. This makes it easier to guide the push rod into the brake master cylinder.

-- Install new nuts -3- and tighten. Note torque.

Fig 1: Brake Booster Bolts, Brake Lines & Brake Master Cylinder Bolts

Courtesy of AUDI OF AMERICA, LLC

-- Install brake lines -2- on brake master cylinder. Note torque.

Fig 2: Identifying Brake Master Cylinder Components

Courtesy of AUDI OF AMERICA, LLC

-- Install the brake fluid reservoir -1-, refer to BRAKE FLUID RESERVOIR .

-- With manual transmissions, insert the clutch hydraulic line -5- into the brake fluid reservoir.

-- Fill the brake fluid up to the marking.

-- Bleed the brake system.

-- With manual transmissions, bleed the clutch, refer to CLUTCH MECHANISM, BLEEDING for 0B2, or CLUTCH MECHANISM, BLEEDING for 0B4 .

-- Install the plenum chamber bulkhead, refer to OVERVIEW - BULKHEAD .

-- Install the tower brace, refer to TOWER BRACE, REMOVING AND INSTALLING .

-- Install the engine cover.

-- Install plenum chamber cover, refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

-- Perform ESP driving and system test.