Caution: On vehicles equipped with ABS, disconnect the battery before disconnecting any hydraulic connection of the brake system and reconnect the battery only after all components of the hydraulic system are completely connected.
Removal
1. Raise the front of the car and secure it on stands. Remove the corresponding wheel.
2. Using a G-clamp, clamp the brake hose.
3. Clean the area around the brake hose connector and caliper. Loosen the connection. Disconnect the electrical connector from the brake pad wear sensor (indicated by arrows).
4. Unscrew the upper and lower bolts securing the caliper guide pin. Use a thin wrench to hold the pin from turning.
5. Remove the caliper from the brake disc, unscrew the caliper from the brake hose.
Repair
1. Carefully clean the caliper of brake dust and dirt.
2. Remove the piston from the caliper body and remove the dust seal.
3. Using a small screwdriver, remove the piston seal ring, being very careful not to damage the piston bore in the caliper.
4. Clean all parts thoroughly using methylated spirits (isopropyl) alcohol or a special liquid for cleaning the hydraulic brake system. Do not use gasoline or other solvents that corrode rubber sealing rings. Using compressed air, dry all parts and blow out the channels in the caliper.
5. Check all parts for wear and damage. Pay special attention to the condition of the working surfaces of the cylinder and piston. If they are scratched or have obvious signs of wear, the caliper assembly must be replaced.
6. Rubber sealing rings and protective seals must be replaced.
7. Before assembly, make sure all parts are clean and dry.
8. Lubricate the caliper cylinder, piston and new O-ring with clean brake fluid.
9. Use your fingers to install the new sealing ring into the caliper cylinder.
10. Install the dust boot onto the piston so that the inner diameter of the boot fits into the piston groove.
11. Insert the piston into the caliper and simultaneously insert the outer edge of the dust cover into the caliper until it locks in place. If the guide pins are being replaced, lubricate them with special grease and install the dust covers into the grooves of the guide pins.
12. Insert the guide pins into the caliper and position the outer portion of the boot in the grooves.
Installation
Caution: When reinstalling the caliper, use new guide pin mounting bolts.
Source available here: Peugeotbook.ru
1. Screw the caliper onto the brake hose.
2. Check that the brake pads are correctly positioned in the caliper holder and install the caliper, passing the brake pad wear sensor wire through the hole in the caliper.
3. Coat the threads of the guide pin bolts with a lubricant to prevent loosening (Loctite Frenetanch), screw the bolt into the lower guide pin, press the caliper and screw the bolt into the upper guide pin. Tighten both bolts to the specified torque.
4. Connect the electrical connector to the brake pad wear sensor wire.
5. Remove the clamp from the brake hose and bleed the brake system.
6. Install the wheel and lower the vehicle.