They will out load a joy that's for sure, but the new one we had was junk! You'd get 2 shifts out of it before the onboard CPU would overheat and it would be down 3 shifts while Caterpillar ( who had just bought Bucyrus) would send people out to fix it. I called it the " Billy Ray Bucyrus miner". because it was "achy and breaky." 😂