Power: 66 hp Date of manufacture : 1968 - 1972
Production Manufacturer: International Harvester Factory: Doncaster, England Total built: 3,848 International Harvester 634 Power Engine: 66 hp 49.2 kW PTO (claimed): 59.3 hp 44.2 kW International Harvester 634 Engine Mechanical Chassis: 4x2 2WD   4x4 4WD*Four-wheel drive conversion by County 2WD Steering: manual 4WD Steering: power Brakes: mechanical disc Cab: Open operator station. Cab optional. Transmission: 8-speed Photos International Harvester 634 photos... Hydraulics Pressure: 2500 psi 172.4 bar Pump flow: 10.4 gpm 39.4 lpm Steering flow: 4.8 gpm 18.2 lpm Steering press.: 1500 psi 103.4 bar Tractor hitch Rear Type: II Control: position and draft control Rear lift: 3360 lbs 1524 kg Power Take-off (PTO) Rear PTO: independent Rear RPM: 540 (1.375) Engine RPM: 540@1458 Dimensions & Tires 2WD Wheelbase: 86.8 inches 220 cm 4WD Wheelbase: 86.8 inches 220 cm AWD Wheelbase: 75 inches 190 cm Weight: 6546 to 9574 pounds Front tire: 7.50-16 2WD Rear tire: 11-38 Full dimensions and tires ... Electrical Charging system: generator Battery volts: 12 Battery AH: 95

International Harvester 600	Power: 57 hp[P]	Date of manufacture : 1956 - 0000

International Harvester 606	Power: 55 hp[P]	Date of manufacture : 1962 - 1967

International Harvester 624	Power: 58 hp	Date of manufacture : 1965 - 1972

International Harvester 633	Power: 52 hp	Date of manufacture : 1975 - 1978

International Harvester 634	Power: 66 hp	Date of manufacture : 1968 - 1972

International Harvester 644	Power: 60 hp	Date of manufacture : 1974 - 1980

International Harvester 645	Power: 0	Date of manufacture : 0000 - 0000

International Harvester 650	Power: 63 hp[P]	Date of manufacture : 1956 - 1958

International Harvester 654	Power: 60 hp	Date of manufacture : 1972 - 1974