Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Caliper Piston
4. Using a rubber nosed air nozzle at the brake fluid inlet port, apply low pressure air to force the disc brake caliper pistons out of the disc brake
caliper bores.
WARNING: To avoid damage or injury, use only enough air pressure to expel the piston. Do not attempt to catch the caliper piston as it
is forced out of the disc brake caliper.
5. To encourage the removal of a reluctant caliper piston, tap gently around it. If a caliper piston cannot be removed from the disc brake caliper
replace the disc brake caliper.
6. Using a suitable tool, pry the caliper piston dust boots out of the disc brake caliper bores. Discard the caliper piston dust boots.
7. Remove and discard the disc brake caliper piston seals from the caliper bores.
CAUTION: To avoid damage to the bores or seal seats, use only a non-metallic tool to remove the piston seals.
ASSEMBLY
1. Clean and inspect the disc brake caliper bores for scoring, rust, pitting or other damage. Do not hone a worn or damaged caliper bore. A new disc
brake caliper must be used.
2. Clean and inspect the caliper pistons for cracks or other damage. Do not attempt to repair a worn or damaged caliper piston. A new one must be
installed.
3. Clean and inspect the caliper pin bolt bushings. Replace if worn or damaged.
