That Cat 613B we have had teeth on it when we got it, but they were worn the fuck out. We tried using it and it wouldn't fill itself up more than halfway on a long pass. Took those teeth shanks off, ground them down to fit some standard twin point backhoe teeth on it and then put them back on, and it went to filling itself over full in like 1/4 of the distance.
Amazing what some fresh teeth will do for something like that!
These are the only two pics I have of it, and they were from the guy that was selling it. Had it trucked in from Oklahoma if I remember right. I think we paid $13,000 or 13,500 for it. The exhaust stack rotted off shortly after we got it and I put a straight pipe and turndown on it and it exits behind the front axle now.
It is a blast to run the damn thing, and you get pretty quick at it. Brakes were pretty crappy, but normally I wouldn't even touch them, just downshit through the gears to slow down and lower the pan and start the paddles to dig. When you get full then you raise the pan and shut your paddles off and haul ass to where you want to dump. Dump on the fly to spread the dirt out or build your road up and turn around and head back for another load.