Checking the front brake caliper

1. Check:

• Brake caliper pistons "1" Rust/scratches/wear Replace the
  brake caliper assembly.
• Brake caliper body "2" Cracks/damage Replace the brake
  caliper assembly.
• Brake fluid delivery passages (brake caliper body) Obstruction Blow out with
  compressed air.

Whenever a brake caliper is disassembled, replace the brake caliper piston dust seals and piston seals.

2. Check:

• Brake caliper bracket Cracks/damage Replace.