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Home >> Audi >> 2022 >> S6 Premium Plus >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Components (Brake System) (1 Of 3) >> 47 Hydraulic Components >> Front Brake Caliper >> Dust Cap, Removing And Installing >> Removing

Dust Cap, Removing And Installing: Removing

-- Tension the brake caliper in a vise with protective covers over the jaws.

TIP:

Make sure that the paint coat on the brake caliper is not damaged when removing the brake caliper pistons and the protective caps.

CAUTION:

Leaking brake fluid increases the risk of injury.

Irritation and injury to skin and eyes possible.

- Wear protective eyewear.

- Wear safety gloves.

-- Place a cloth over the brake caliper chamber to catch any spraying brake fluid. Place another cloth tightly around the compressed air gun nozzle on the brake caliper.

CAUTION:

Risk of injury due to sudden release of the brake caliper piston when pressing out.

- Never reach with the fingers into the brake caliper opening.

TIP:

Fig 1: Forcing Pistons Out Individually Of Brake Caliper Housing Using Compressed Air
GWWN47-0216Courtesy of AUDI OF AMERICA, LLC

Only one brake caliper piston can be pressed out at a time.

-- Hold the opposite brake caliper piston firmly in the brake caliper using the :T10145  -a-.

-- To prevent damage to the brake caliper paint coating, place a piece of rubber between the :T10145  and the brake caliper.

-- Block the other brake caliper pistons, for example, using wooden blocks -b-. In addition, place a wooden board -c- in front of the :T10145  so that the brake caliper piston will not be damaged when pressed out.

-- Position the compressed air gun nozzle on the hole for the brake hose and press the brake caliper piston out of the brake caliper.

-- Carefully remove the protective cap -1- with a screwdriver -2- with light hammer strokes -arrow- from the brake caliper, while doing this do not damage the brake caliper coating.

Fig 2: Remove Protective Cap With A Screwdriver
GWWA47-10163Courtesy of AUDI OF AMERICA, LLC