The Hinomoto HB-501 Combac is a compact utility tractor produced from 1972 to 1977 by Hinomoto. It features a Toyosha TE-150 0.6L 1-cylinder air-cooled gasoline engine producing 17 hp (12.7 kW) gross power. The tractor has a 6-speed gear transmission with 2 reverse gears and a dry disc clutch. It is a two-wheel drive tractor with manual steering and an open operator station. Dimensions include a 43.3 inch (109 cm) wheelbase, 145.1 inch (368 cm) length, 43 inch (109 cm) width, and a weight of 2315 lbs (1050 kg). The HB-501 can be equipped with a Hinomoto backhoe attachment with a digging depth of 84 inches (213 cm).