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Home >> Audi >> 2019 >> A3 Premium >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Components (Brake System) [Convertible] >> 47 Hydraulic Components >> Front Brake Caliper >> Brake Caliper Piston, Removing And Installing >> Brake Caliper Piston, Removing And Installing, Eight-Piston Brake >> Removing

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

WARNING:

Risk of injury!

  • Wear protective eyewear.
  • When removing the brake caliper piston, never touch the brake caliper chamber with fingers.
  • 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.
  • To prevent skin contact with brake fluid, wear chemical resistant safety gloves.
NOTE:

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

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-.

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

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

-- Block the other 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.

Fig 2: Forcing Pistons Out Individually Of Brake Caliper Housing Using Compressed Air
GWWN47-0216Courtesy of AUDI OF AMERICA, LLC

-- Carefully remove the brake caliper piston with the seal from the brake caliper.

-- Carefully pry the protective cap -1- and the seal out of the brake caliper with the -VAS40338- -2- using gentle lever movements, and do not damage the groove for the protective cap in the brake caliper while doing so.

Fig 3: Prying The Protective Caps
GWWA00-11206Courtesy of AUDI OF AMERICA, LLC