Cleveland Tractor Co. Medium M2 Tractor This M2 Tractor, popularly known as a "Cletrac," is an example of one type of vehicle used at AAF bases during World War II for moving aircraft and heavy trailers. The Cletrac was particularly effective for moving vehicles or aircraft that had become bogged down in mud. The M2 has a gross weight of 13,800 pounds and a maximum drawbar pull of 7,000 pounds. It also features an electric generator and an air compressor. This particular tractor was delivered to the Army Ordnance Department in November 1942. The museum acquired it in 1990. Click here to return to the Korean War Gallery.