International Harvester 633

The International Harvester 633 is a utility tractor produced from 1975 to 1978 as part of the 33 Series. Built in Neuss, Germany, it features a 2.9L 3-cylinder liquid-cooled diesel engine producing 52 hp (38.8 kW). The tractor offers 8-speed and 16-speed synchron transmissions with multiple forward and reverse gears. It is available in two- or four-wheel drive configurations with disc brakes and an open operator station, with an optional cab and heater. Fuel capacity is 15.85 gallons (60.0 L) and hydraulic system capacity is 3.2 gallons (12.1 L) with a pump flow of 8.6 gpm (32.6 lpm). The rear hitch is category II with a lift capacity of 3969 lbs (1800 kg) and an independent 540 rpm rear PTO. Dimensions vary by configuration, with wheelbases of 81.5 inches (2WD) and 79.9 inches (4WD), and shipping weights from 5158 to 5589 lbs. Standard and optional tire sizes are available for both 2WD and 4WD models.