Withdrawal
Raise the rear of the car, put it on stands and remove the wheels.
Knock out the fixing pins of the brake shoes and remove the cruciform springs.
Remove the brake pads. If the pads are to be reused, mark the pads before removing them so that they can be reinstalled in their original positions.
Clean the guide surfaces and windows in the calipers.
Installation
Make sure the spring guide is properly installed.
Install the outer brake shoe and carefully slide the piston into the cylinder with a piece of hardwood.
Install the inner brake shoe while replacing the cruciform spring and shoe retainer pins.
Press the brake pedal several times to set the pistons to the working position.