I bet that thing ate tires like nothing else, ever! https://www.bigiron.com/Lots/MelroeM870BuffaloWheeledCoalDozer https://www.bigiron.com/Lots/MelroeM870BuffaloWheeledCoalDozer One side had Rockwell hubs, the other had Cat hubs, and one side per engine. Turning would not be its strong suit.
Motor needs a tune up
IT sold in 2017 and one of the two NTC 855 Cummins was " weak and smoked " at that time.