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Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Service Information) >> Front Disc Brake Assembly >> Disassembly

Front Disc Brake Assembly: Disassembly

CAUTION:
  • Be careful not to allow foreign matter to enter the brake hose connector.
  • Since the 17-inch & 18-inch (Brembo) caliper bodies are easily scratched and the paint may be stripped, protect them from being contacted with other parts or tools.
  1. Remove mud and foreign matter from the caliper body assembly.
  2. Remove the piston boot.
    NOTE: Remove the 4 piston boots for the opposed 4-POT piston type, and remove the 6 piston boots for the opposed 6-POT piston type.
    G13646594Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the piston - disc brake.
    1. Place a wooden block in the caliper body as shown in the figure to prevent the piston - disc brake from jumping out and being damaged.
    2. Using an air gun, gradually apply compressed air via the brake hose installation hole to push out the piston - disc brake.
    NOTE: Instead of removing the pistons one by one, remove all pistons at once after adjusting the amount of protrusion evenly using a wooden block.
    G13646595Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the piston seal (a).
    CAUTION: Do not damage the cylinder and piston seal groove.
    NOTE: Remove the 4 piston seals for the opposed 4-POT piston type, and remove the 6 piston seals for the opposed 6-POT piston type.
    G13646596Courtesy of SUBARU OF AMERICA, INC.
  5. Remove each part from support - front disc brake. (Floating 2-POT piston type)
G13646597Courtesy of SUBARU OF AMERICA, INC.