If it can still be opened (the rope guide is not stuck, if it is stuck, remove the rope guide), lower the hook, that is, let the wire rope on the drum reach the end, and use an oxygen-acetylene flame to grill it. When the deformed area at the bottom of the casing burns red and becomes soft, you can use a crowbar to insert into the gap between the drum and the casing to pry out some space for the rope guide and wire needle to pass through. Note that the lower opening of the casing should be in a straight line to facilitate the installation of the rope guide. The lower opening of the pressure plate slides evenly when running up and down