Going out on a limb here...found some more pics. Could one of the studs on the "actuator" or the plate in the middle have broken or come loose??? Looks like from the pics the diaphragms themselves hold the plate in the middle, then the magnets pull back and forth which pushes the two diaphragms. The two diaphragms will try to self center I would think. Maybe one of the diaphragms tore, making the plate loose and get pulled against the magnet? Or the nut that holds the diaphragms tight backed off??


The pics are a parts breakdown of a hiblow hp80, the actuator plate thing in the middle #18, and the diaphragms. I don't know if yours is a hp80, but just going by similarities in the pics. Maybe it will help.