changing pins on barn doors was a pain in the ass, at least for me. tried to knock them out but did nothing but agrivate myself, and hit my thumb. then cut pin with die grinder, heated hinge with a welding torch with a friend as he knocked them out with hammer and punch, they do make a tool to remove these pins with but after talking to a buddy at a body shop found the way i did it is how they normally do it. how ever you do it its a pain. but i only had to replace passenger side door hinges. it did only take 45 min. tho with the torches, spent 15 min beating on the pins without torches to no good.