The MAZ- 537 is a 12-cylinder diesel engine-powered military truck tractor, originally designed for loads up to 50 tons (using semitrailers such as the ChMZAP-9990 or ChMZAP-5247G, for example) with later versions providing a maximum load of 65 tons. It has been manufactured by the Minsk Automobile Plant (from 1959 to 1965) and the Kurgan Wheel Tractor Plant from 1963 until halt of production in 1990.