Production years: 1955–1990 A four-wheel-drive heavy wheeled bulldozer. The first prototypes were developed at the Minsk Automobile Plant in the mid-1950s, and over time these machines were built both at the Minsk Automobile Plant and at the Kurgan Wheeled Tractor Plant (KZKT). Depending on the working unit, the machine was also designated BKT or PKT over the years. These machines were used above all by the army. Technical data: Engine D12A-375, liquid-cooled V12 diesel, 38,800 cm3, 276 kW/375 hp Gearbox: hydromechanical 3-speed, 2-speed transfer case Drive: 4x4 Top speed: 45 km/h Dimensions: 5800*3120*3100 mm Wheelbase: 3000 mm Fuel tank capacity: 2x240 l Kerb weight: 16.5 t Gross weight: up to 19.5 t The PKT is a special version of the MAZ-538 with an angle blade for clearing and maintaining routes for army convoys.