In the world of mining trucks, there’s an ongoing dispute about exactly which one is the largest. Many of these beasts are equipped with electromechanical drivetrains, like a locomotive. But not this massive Cat. The 797B uses the same kind of direct mechanical drive as, say, a Chevy Silverado. So in terms of conventional powertrains, this is the largest. “It’s just a big yellow truck,” says Mark Richards, marketing supervisor for Caterpillar’s large mining trucks division. A big yellow truck powered by a V24 diesel that generates 2514 Kw and a mind-boggling 16 500.304 476 newton meters of torque.