When I rebuilt my door hinges, I needed to recondition the holes that the springs go in to keep them from falling out. Also the slot in the hinge cage needed to be re-formed as well to repair the wear.
As Jerry's video shows, there are TWO holdopen springs on each upper door hinge.
A trick to keep the doors aligned is to drill a 1/16 inch hole thru the door sheet metal into the hinge strap before removing them. When reinstalling, line up the hole with the back end of the drill bit. That assumes that the hinge pins aren't severely worn.
