1. Lift up the vehicle, and remove the front wheels.
2. Remove the caliper body and the support from housing, and suspend it from the strut using a wire.
3. Remove the disc rotor.
NOTE:
If it is difficult to remove the disc rotor from the hub, drive an 8 mm bolt into the threaded section (B) of the rotor, then remove the rotor.
4. Remove mud and foreign matter from the caliper body assembly and the support.