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Home >> Audi >> 2022 >> S8 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Components (Brakes) >> 47 Hydraulic Components >> Brake Booster/Brake Master Cylinder >> Brake System Pressure Reservoir -VX70-, REMOVING AND INSTALLING >> Removing

Brake System Pressure Reservoir -VX70-, REMOVING AND INSTALLING: Removing

-- If replacing the Brake System Pressure Reservoir -VX70-, select the "Brake system pressure reservoir, replacing" program. Refer to DIAGNOSTIC ENTRIES .

-- Follow the instructions in the Vehicle Diagnostic Tester display.

-- Remove the plenum chamber cover. Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

-- Remove the windshield wiper motor. Refer to WINDSHIELD WIPER MOTOR -V-, REMOVING AND INSTALLING .

-- Insert the Brake Pedal Actuator: VAG1869/2  -item A- between the brake pedal and driver seat. Press the brake pedal down at least 60 mm (2.36 in.).

GWWN46-10557Courtesy of AUDI OF AMERICA, LLC

By doing this, the valves in the brake master cylinder are closed and the brake fluid reservoir does not run empty.

CAUTION:

Leaking brake fluid increases the risk of injury.

Risk of skin irritation and injury.

- Wear protective gloves and eyewear.

-- Remove the protective cap -3- from the bleed screw -1- on the left front caliper.

Fig 1: Identifying Protective Cap, Bleed Screw And Container Bleeder Hose
GWWA46-10203Courtesy of AUDI OF AMERICA, LLC

-- Connect the collection bottle hose -2- as shown.

-- Open the bleed screw to reduce the pressure in the brake system.

-- Close the bleed screw and remove the collection bottle.

-- Repeat the procedure on the left rear brake caliper.

-- To prevent brake fluid from escaping, place enough lint-free cloths in the area under the pressure reservoir.

GWWA47-10124Courtesy of AUDI OF AMERICA, LLC

-- Remove the union bolt -3- and remove the brake line from the pressure reservoir -1-.

-- Immediately close open connection points with a clean plug.

-- Disconnect the connector -2-.

-- Pull the Brake System Pressure Reservoir -VX70- -item 1- upward from the retaining pins and remove it.

-- If the Brake System Pressure Reservoir -VX70- -item 1- needs to be replaced, remove the bolts -arrows- and the bracket -2-.

GWWA47-10348Courtesy of AUDI OF AMERICA, LLC