Front Disc Brake Assembly: Disassembly

WARNING: This page is about a different car, the 2016 Subaru Impreza and 2016 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Be careful not to allow foreign matter to enter the brake hose connector.

Remove mud and foreign matter from the caliper body.
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.
  
  Fig 1: Applying Compressed Air To Piston Disc Brake Using Air Gun
  Courtesy of SUBARU OF AMERICA, INC.
Remove the piston boot (b) and piston seal (c) from the caliper body cylinder (a).
CAUTION: Do not damage the cylinder and piston seal groove.

Fig 2: Removing Piston Boot And Seal From Caliper Body Cylinder
Courtesy of SUBARU OF AMERICA, INC.
Remove the guide pin - front brake, lock pin - front brake, lock pin - sleeve, and pin boot from the support - front disc brake.

Fig 3: Removing Guide Pin - Front Brake
Courtesy of SUBARU OF AMERICA, INC.