Caliper Overhaul

Fig. 1 Kelsey-Hayes pin slider disc brake caliper (Typical):

DISASSEMBLE
1. Remove caliper assembly from vehicle as described under ``Caliper, Replace.''
2. Position fiber block and shop towels between caliper piston and caliper housing, then apply compressed air to caliper brake line fitting bore to force piston from caliper.
3. Remove dust boot from caliper assembly, Fig. 1.
4. Remove pistol seal from cylinder and discard.




INSPECTION
Clean all metal parts with isopropyl alcohol, then clean and dry passages and grooves with compressed air. Check caliper and piston for damage and wear and replace as necessary.

Fig. 1 Kelsey-Hayes pin slider disc brake caliper (Typical):

ASSEMBLE
1. Lubricate piston seal with clean brake fluid, then install seal in caliper bore. Ensure seal is firmly seated in groove.
2. Install dust boot in outer groove of caliper bore, Fig. 1.
3. Coat piston with clean brake fluid and install piston in caliper bore. Spread dust boot over piston as it is installed. Seat dust boot in piston groove.
4. Install caliper assembly as described under ``Caliper, Replace.''