Saw a Fat Allis in a landfill once pushing garbage. I was working on a loader nearby and noticed a really odd racket coming from the machine every time he changed direction. He finally backed out of the hole up close to me and I could see the sprockets were worn down to the point there were no teeth at all just some ripples really. When he started to go forward again it sounded like a ratchet, dit,dit,dit,dit,dit,dit,dit,dit, decel pedal, dit,dit,dit,dit,dit,dit,dit,dit, decel pedal, dit,dit,dit,dit,dit,dit,dit,dit, and then it would kinda start moving and he would skim a couple inches with the blade. From the look on his face it mighta been his last day, LOL. I always wondered what the finals looked like inside.