F-53s will not track very well unless the toe-in is set correctly. Loose front end parts also contribute to wander. If the grease boy doesn't understand that kingpins need grease, those will wear quickly. When the toe-in is set properly, tires will wear on the outer edge a little (generally enough to necessitate replacing the front tires before the rear). The price of admission for big truck tracking straight. Front end techs that aren't familiar with long chassis with straight axle adjustment will try taking off some of the toe-in to help with the tire wear. Boom. Wandering motorhome.