Brake Master Cylinder, Removing And Installing: Installing

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2016 Audi S4, 2016 Audi A4 Quattro, 2016 Audi A4, 2015 Audi S4, and 2015 Audi A4 Quattro. 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 and tighten new nuts -3-. Pay attention to the tightening specification.

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

Courtesy of AUDI OF AMERICA, LLC

-- Attach the brake lines -2- to the brake master cylinder. Note the tightening specification.

-- Install the brake fluid reservoir. Refer to BRAKE FLUID RESERVOIR, REMOVING AND INSTALLING .

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

Fig 2: Identifying Brake Master Cylinder Components

Courtesy of AUDI OF AMERICA, LLC

-- Fill the brake fluid up to the marking.

-- Bleed the brake system. Refer to HYDRAULIC SYSTEM .

-- For manual vehicles, 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 the plenum chamber cover. Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

-- Perform the ESP driving and system test.