The Allis Chalmers 645 is a wheel loader produced from 1965 to 1971 as part of the 45 Series. It was built in Deerfield, Illinois, USA, with a total production of 3012 units. It features a turbocharged 7.0L 6-cylinder diesel engine producing 165 hp (123 kW) net power, coupled with a 4-speed power shift transmission. The loader has four-wheel drive with planetary final drives and articulated power steering. The operator station is open with an optional cab and heater. Hydraulics include a 71 gpm pump flow and 18 gpm steering flow. Dimensions include a 116 inch (294 cm) wheelbase and a shipping weight of 22930 lbs (10401 kg). Tires are industrial size 17.5-25 front and rear, with other size options available. Attachments include a front-end loader with 40° rollback at ground line.