The M4 high-speed tractor used M5 Stuart tracks, roadwheels, and drive sprocket. The suspension was of the HVSS type, first introduced on a light tank T6 project in 1938. One variant was designed to tow the 90 mm anti-aircraft gun, and another was for the 155 mm gun or 8-inch howitzer. The rear compartment carried the gun crew and other equipment. Later, variants included a crane to assist with heavier projectiles. Two types of ammunition boxes were used on all models: a 90 mm box with side “tailgates” to access 90 mm shells pigeon-holed in the sides, and a combination box for 155 mm or 8-inch ammunition.
The M4 was built by tractor manufacturer Allis-Chalmers of West Allis, Wisconsin, starting in 1943. It remained in U.S. military service until approximately 1960. After WWII, under the US Mutual Defense Assistance Program, M4s was supplied to Greece, the Netherlands, Japan, Brazil, Yugoslavia and Pakistan and other states friendly to the USA. Production of the M4 Tractor ended in 1945 with over 5,800 produced.
From the Count Ferdinand von Galen Collection, donated by his family in memoriam.
