Brake Master Cylinder, Removing And Installing: Installing

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Install in reverse order of removal and note the following:

Always replace the self-locking nuts and bolts.

Replace damaged bolts and nuts.

Clean the bolts and nuts before reusing.

Replace the seal after removal.
Do not let any brake fluid run into the brake booster.
The actuator pin -Item 19- for the brake lamp switch must be inserted in the brake master cylinder.

Always replace the self-locking nuts and bolts.

Replace damaged bolts and nuts.

Clean the bolts and nuts before reusing.

-- When inserting the brake master cylinder -1-, make sure that the pressure rod -3- is seated correctly in the brake booster -2-.

Courtesy of AUDI OF AMERICA, LLC

-- If necessary, have a second technician press the brake pedal downward slightly. This allows the brake master cylinder to be guided into the pushrod more easily.

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

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

-- Fill the brake fluid reservoir up to the "MIN" mark.

Fig 1: Brake Fluid Reservoir

Courtesy of AUDI OF AMERICA, LLC

-- Remove all cloths from the vehicle that were previously placed down.

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

CAUTION:

Faulty brakes increase the risk of an accident.

- Make sure the brakes are working correctly before driving the vehicle for the first time.