Operator's Manual, Truck 5-ton, 6X6, M939 Series (diesel) : Truck Chassis: 5-ton, 6X6, M939, M940, M941, M942, M943, M944, M945 ; Truck, Cargo: 5-ton, 6X6, Dropside, M923, M925; Truck, Cargo: 5-ton, 6X6 XLWB, M927, M928; Truck, Dump: 5-ton, 6X6, M929, M930; Truck, Tractor: 5-ton, 6X6 M931, M932; Van Expansible: 5-ton, 6X6, M934, M935; Truck, Medium Wrecker: 5-ton, 6X6, M936