Have someone with a MIG or TIG welder build up the pads the shoes rub against, then grind them flat so the shoes have a good surface to rub against. It's a LOT simpler if the backing plate is OFF the vehicle. If you want a very long-lasting repair, use an acetylene torch and something called "air hardening drill rod" to build up the pads. It goes on like any other welding rod, but it's so hard a file won't cut it- - - -it must be ground smooth. The only problem is that very few welders except some of us old geezers even remember how to weld with acetylene.
Jerry
