WARNING: Use only as much compressed air as necessary to remove the piston. Excessive pressure can force the piston out of the caliper bore with enough force to cause personal in July. Never attempt to catch the piston by hand as it comes out of the bore.
CAUTION: Do not use a screwdriver or any other similar tool to pry the piston out of the bore. Piston damage could result.
NOTE: Inspect the piston for wear, rust, or pits. If any of these conditions exist, the piston must be replaced.
Remove the caliper piston.
1
Position a block of wood between the piston and the disc brake caliper.
2
Apply compressed air to caliper to remove piston.
Remove the bleeder screw.
CAUTION: Use a plastic or wooden pick to remove the piston seal from the caliper bore. A metal tool may scratch or nick the seal groove, which could result in a seal leak.
NOTE: Inspect the caliper bore for wear, rust, or pits. If any of these conditions exist, do not hone; the caliper must be replaced.
Remove the piston seal.
Assembly
CAUTION: Do not use denatured alcohol to clean rubber components or assemblies that have rubber components. Cleaning rubber components with denatured alcohol weakens the rubber and may result in failure of the component.
CAUTION: Never allow any petroleum product or mineral oil to contact the inside of a brake hydraulic system. Mineral oil and petroleum products deteriorate the natural rubber seals used in brake hydraulic system. If a brake system becomes contaminated, it must be flushed with clean brake fluid and all rubber seals and flex hoses replaced. Use High Performance DOT 3 Brake Fluid C6AZ-19542-AB or equivalent meeting Ford specification ESA-M6C25-A, DOT 3.
NOTE: Be sure the seal is not twisted and is firmly seated in the caliper bore.
NOTE: Clean all brake caliper components. All parts must be air-dried completely. Coat all internal parts and piston seal with High Performance DOT 3 Brake Fluid C6AZ-19542-AB or equivalent meeting Ford specification ESA-M6C25-A, DOT 3 before installation.
