It is totally about application! the way dumptrucker used it is an ideal situation, only making one product from an already produced pile perfect application for a tracked machine. Aboslutely no doubt that a wheel mounted plant "operates" cheaper per ton than tracked (this does not include set-up or mobe). In my experience if you are trying to produce a crushed smaller spec rock product the track machines loose there function because you are trying to "fit" multiple screens and crushers together typically with portable conveyors which sit on the ground!!! I have experience with pegson impactors, impactors with screens on them, two sizes of there jaws, cones, powerscreens of multiple sizes, and array of wheel mounted crushing equipment. I have 100's of hours of repair time in the pegson tracked 27x44 jaw plant. The best application I ever saw one used in was a smaller pegson track jaw it was on a steep narrow goat trail of a road an excavator was digging up the road bed which was like 12" minus which had been placed with a dozer many moons ago, on the discharge end a track loader (to steep and narrow for a wheel loader) was knocking down the pile so it didn't build up under the belt, later they came back and graded the road somehow probably a cat with a pat dozer, wasn't there for that part... Again its all about application!!!! TIO