4-Ton, 6 x 6 trucks (Diamond T models 968A Cargo, 969A Wrecker, 970A Ponton, and 972 dump) - USA Voorschrift, Technical Manual, 9-811 Truck, Chassis, 5 Ton, 6x6, M39, M40, M40C, M61, M63, M63C, M139, M139C, M139D, M139F; Truck, Cargo, 5 Ton, 6x6 M41, M54, M54A1, M55; Truck, … Technical Bulletin. Load-Testing Vehicles used to Handle Missiles and Rockets Medium Wrecker M 62, Medium Wrecker Truck M 543 Series and M 816; and Wrecket-Truck …