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Home >> Audi >> 2011 >> S4 Standard >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System - Hydraulic Components (Sedan) (As Of 09.2011) >> 47 Hydraulic Components >> Removal And Installation >> Master Brake Cylinder >> Installing

Master Brake Cylinder: Installing

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
GWWA47-0186Courtesy of AUDI OF AMERICA, LLC

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

Fig 2: Identifying Brake Master Cylinder Components
GWWA47-10054Courtesy 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.