Brake Caliper Piston, Removing And Installing, Six-Piston Brake: Removing

Brake caliper removed and separated from the hydraulic system. Refer to BRAKE CALIPER, REPLACING, STEEL BRAKES 1LJ/1LL/1LM/1LX/1LY/1LZ/1ZA/1ZC/1ZK/1ZX or BRAKE CALIPER, REPLACING, CERAMIC BRAKES .

-- 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

Courtesy 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 Piston Resetting Tool -T10145- -a-.

-- To prevent damage to the brake caliper paint coating, place a piece of rubber between the Piston Resetting Tool -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 Piston Resetting Tool -T10145- -a- so that the brake caliper piston will not be damaged when pressed out.

The bleed screws are closed.

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

TIP:

Courtesy of AUDI OF AMERICA, LLC

If the same protective caps should be re-installed, use the Removal Tool :T40338 to remove them without damaging them.

-- Carefully pry the protective cap -1- and the seal out of the brake caliper with the Removal Tool -T40338- -2- using gentle lifting movements, and do not damage the groove for the protective cap in the brake caliper while doing so.