Attention! In case of serious damage (cylinder leak, piston seizure, etc.) it is recommended to replace the caliper.
1. Loosen the wheel nuts, lift the car and place it on stands. Remove the wheels. Remove the brake caliper from the disc (see description of replacement of disc brake pads), without disconnecting the hose.
2. Mark the relative position of the brake hose fitting and the caliper and unscrew the bolt securing the ring fitting of the hose to the caliper.
3. Remove the caliper and the copper sealing washers of the ring fitting. Clean the caliper with a special liquid.
4. Wrap the caliper with a rag, or place a block under the cylinder and remove the piston from the cylinder using compressed air, feeding it into the hole under the hose fitting (see photo).
5. Inspect the piston surface for scratches, scoring, and coating wear. If surface defects are found, replace the piston. Check the condition of the caliper cylinder. The presence of stains or small traces of corrosion is allowed; these can be removed by manual polishing.
6. If the parts are in good condition, replace the piston seal and dust cover (see photo from repair kit).
7. Clean the piston and cylinder with brake cleaner, clean brake fluid or denatured alcohol.
8. Lubricate the new piston seal with clean brake fluid and fit the seal by hand into the cylinder groove (see photo).
9. Install a new dust boot into the groove on the edge of the piston. Dip the piston into clean brake fluid and insert it straight into the cylinder. Press the piston toward the base of the cylinder (see photo).
10. Install the cover into the caliper (look at the photo).
11. Connect the brake hose to the caliper, replacing the copper washers, align the fitting with the mark applied before disassembly, make sure that the hose is installed along the original route.
12. Install the caliper in reverse order.
[The text of the article was obtained from the website: «ChevyMan.ru»]