1. Caps; 2. Piston assembly; 3. Piston - clean the piston and brake cylinder with DOT3 or DOT4 brake fluid; 4. Piston seal: - installation position: edge up (not on the piston side); - to avoid deformation or damage to the cuff when installing it on the piston, place it smoothly and evenly; 5. Spring; 6. Bleed valve; 7. Brake cylinder housing
