I bet it's rusted in place or seized from lack of lube try spraying some penetrating oil in all openings ,slots between table . Anywhere you can get some into the shafts , try working it back and forth slowly don't overpower it , or dissemble it .then you can find what's going on with it.Hey if all else fails send it to me I'll try to fixit just pay the freight to me and back to you. With a ph number take a day or so long as it don't need any parts.