Disassemble/Assemble

DISASSEMBLE
1. Remove shoe and lining assemblies.
2. Pad interior of caliper housing with shop towels to prevent damage to pistons during removal.
3. Position shop towel in interior part of caliper, then slowly apply compressed air to inlet port and remove pistons. It is imperative that one piston be partially installed to facilitate removal of second piston from bore. A pad or wooden spacer may be used to prevent complete removal of first piston.
4. Remove dust boots from pistons.
5. Using a small piece of wood or plastic, remove piston seal from bore. Do not use a metal tool of any kind to remove seal as it may damage bore.
6. Remove bleeder valve cap and bleeder valve.
7. Inspect piston for scoring, nicks, corrosion, and wear and replace as needed.
8. Inspect caliper housing and seal groove for corrosion, nicks, scoring and excessive wear, and use crocus cloth to polish away corrosion from housing bore. Replace caliper housing if corrosion in and around seal groove will not clean up with crocus cloth.
9. Clean all parts with denatured alcohol. Dry with unlubricated compressed air. Blow out all passages in housing and bleeder valve.

ASSEMBLE
1. Install cap onto bleeder valve, then install bleeder valve into caliper.
2. Using clean brake fluid, lubricate piston seals, then install seals into caliper bore grooves. Ensure seals are not twisted during installation.
3. Using clean brake fluid, lubricate caliper bores and piston assemblies.
4. Install boot over end of piston. Place piston into caliper bore, then push downward until fully bottomed in bore. Ensure boot is properly seated into groove around piston and into groove in caliper bore.
5. Repeat step 4 for remaining piston.
6. Install shoes and linings as outlined further on, then bleed brake system.