Power: 51 hp[P] Date of manufacture : 1961 - 1968
Production Manufacturer: Farmall (a part of International Harvester) Type: Row-Crop tractor Factory: Rock Island, Illinois, USA Variants Farmall 504: row-crop IH 504: utility 504HC: high-clearance IH 2504: industrial Farmall 504 Power Drawbar (claimed): 41 hp 30.6 kW PTO (claimed): 46 hp 34.3 kW Plows: 3-4 Drawbar (tested): 40.41 hp 30.1 kW PTO (tested): 46.20 hp 34.5 kW Farmall 504 Engines Mechanical Chassis: 4x2 2WD Steering: manual Steering: power*Optional Brakes: differential mechanical disc Cab: Open operator station. Transmissions: 5-speed unsynchronized gear   10-speed two-speed power shift Photos Farmall 504 photos... Capacity Fuel: 23 gal 87.1 L Hydraulic system: 13 gal 49.2 L Hydraulics Capacity: 13 gal 49.2 L Pump flow: 7 gpm 26.5 lpm (hitch pump)   12 gpm 45.4 lpm (steering/remote pump) Total flow: 19 gpm 71.9 lpm Tractor hitch Rear Type: I   II*Optional Control: position and draft control Type: IH Fast Hitch*Optional Power Take-off (PTO) Rear RPM: 540 Dimensions & Tires Wheelbase: 90 inches 228 cm (tricycle)   96 inches 243 cm (wide-front) Weight: 5430 lbs 2463 kg Front tire: 6.00-16 Rear tire: 12.4-38 504 Serial Numbers Location: Right side of clutch housing photo of 504 serial number 1961: 501 1962: 810 1963: 7000 1964: 7732 1965: 10696 1966: 13596 1967: 15113 1968: 16115 how to read serial numbers...

Farmall 400	Power: 50 hp[P]	Date of manufacture : 1954 - 1956

Farmall 404	Power: 40 hp[P]	Date of manufacture : 1961 - 1968

Farmall 450	Power: 47 hp[P]	Date of manufacture : 1956 - 1958

Farmall 460	Power: 55 hp[P]	Date of manufacture : 1958 - 1963

Farmall 504	Power: 51 hp[P]	Date of manufacture : 1961 - 1968

Farmall 544	Power: 57 hp[P]	Date of manufacture : 1968 - 1973

Farmall 560	Power: 66 hp[P]	Date of manufacture : 1958 - 1963

Farmall 564	Power: 60 hp	Date of manufacture : 1972 - 1974

Farmall 656	Power: 70 hp[P]	Date of manufacture : 1965 - 1973