Our Ford E-350 van side door (60/40 barn door) was so hard to swing, it felt like the hinges were mounted cockeyed. Actually, closing the door felt like I was pushing it thru molasses.
Not all Econoline hinges are the same; Here’s the ones we’re talking about
Then I sprayed WD40 (only because I didn’t have anything else with a straw) in there while I swung the door back and forth. Cover it with a rag while you do that because it’ll spew out of there with all kinds of black corrosion.
Works like a charm. Door swings like buttah!
See You Down the Road!