Caliper Disassembly

Fig. 1 Exploded View Of Delco-Moraine 7735 Series Rear Caliper:

Fig. 3 Removing Piston From Caliper:

1. Remove caliper assembly as outlined previously.
2. Secure caliper assembly in vise and drive out sleeves and bolt boots. Insulate interior of caliper with shop towels.
3. Rotate shoe retainer until tabs are aligned with notches in piston, then remove shoe retainer, Fig. 1.
4. Remove locknut, lever, and lever seal, if installed.
5. Remove piston by rotating actuator screw in parking brake apply direction to work piston from caliper bore Fig. 3.
6. Remove balance spring (20), then remove actuator screw by pressing on threaded end, Fig. 1.
7. Remove seal and thrust washer from actuator screw.
8. Pry dust boot from caliper taking care not to damage caliper bore.
9. Remove piston locator retainer, then the locator.
10. 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.
11. Remove bleeder screw. Remove bracket (5) and bolt (4), Fig. 1, if damaged.
12. Inspect piston for scoring, nicks, corrosion, and wear and replace as needed.
13. 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.
14. Clean all parts with denatured alcohol. Dry with unlubricated compressed air. Blow out all passages in housing and bleeder valve.