https://www.openlearning.com/u..../bisgaardlarsen-smbz
How to Repair a Bifold Door Top Pivot The top pivot may become loose and scrape along the floor. This can be fixed by loosening the set screw of the top bracket. The top pivot pin is made of a screw made of metal that is inserted into a cap made of plastic which has a rounded edging and stays in the track above the front door. You'll also need a screwdriver, or perhaps two pliers. Take off the pin at the bottom. Bifold doors are ideal to save space i