The Parking brake didn't work after the purchase. the season rolled back so that while there is time, I want to do it right. The former owner said that he disabled it so that the passenger could not push for the footrest. I disassembled the mechanism today and did not understand what, removed the cable, removed the traction, unscrewed the nut with a key for 30 ( metric system of measures), pull the traction and it turns out to be with the piston together, removed and the brake fluid flowed, put everything back. when turning the rod, the piston is pushed but the disk does not slow down, I do not understand what is missing there or broken. Who disassembled tell me how it should be. The caliper does not understand the spare parts catalogIMG_20201128_211958.jpg