The Twin D8, a monstrous tractor joining two D8 powertrains, was developed by Peterson Tractor, a California Cat dealer. Wm. K. Holt Machinery bought two of the custom tractors as part of a machine solution for the King Ranch’s need to clear large mesquite trees on thousands of acres of cattle production land in South Texas. The massive Holt Root Plow was designed for the Twin D8 to King Ranch specs. The operator would use a Holt Funnel Dozer to knock the large trees down and the Holt Root Plow would cut them below the bud zone, ensuring they did not re-sprout. These custom tools allowed a Twin D8 to plow four acres per hour.
Twin D8
