Disassembly/Assembly

DISASSEMBLY

Fig. 2 Removing Piston With Compressed Air:

1. Drain brake fluid from caliper.
2. Pad caliper interior with clean shop towels and apply compressed air to remove piston, Fig. 2. Use just enough air pressure to ease piston out of bore. When applying compressed air, do not place fingers in front of piston in an attempt to catch or protect it, as this could result in serious injury.
3. Carefully pry dust boot out of bore.
4. 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.
5. Remove bleeder valve.

ASSEMBLY
1. Lubricate caliper piston bore and new piston seal with clean brake fluid, then position seal in bore groove.
2. Lubricate piston with clean brake fluid, then install a new boot into the groove in the piston with the fold facing the open end of the piston.
3. Using care not to unseat the seal, insert piston into bore and force the piston to the bottom of the bore.
4. Position dust boot in caliper counterbore and install. Check boot installation to be sure the retaining ring molded into the boot is not bent and that the boot is installed below the caliper face and evenly all around. If the boot is not fully installed, dirt and moisture may enter the bore and cause corrosion.