Power: 74 hp[B] Date of manufacture : 1956 - 1958
Production Manufacturer: John Deere Type: Standard-tread tractor Factory: Waterloo, Iowa, USA Total built: 7,080 Mechanical Chassis: 4x2 2WD Steering: manual   power optional Cab: Open operator station. Steel cab optional. Transmission: 6-speed unsynchronized gear Photos John Deere 820 photos... Hydraulics Type: Powr-Trol Valves: 1 Power Take-off (PTO) Rear PTO: independent Rear RPM: 540 Dimensions & Tires Wheelbase: 85.25 inches 216 cm Weight: 7850 to 8600 pounds Front tire: 7.50-18 Rear tire: 15-34 Full dimensions and tires ... 820 Serial Numbers photo of 820 serial number 1956: 8000000 (green-dash) 1957: 8200565 (green-dash) 1957: 8203100 (black-dash) 1958: 8203850 (black-dash) Final: 8207080 (black-dash) how to read serial numbers... Belt Pulley Diameter: 12.2 inches 30 cm Width: 9 inches 22 cm RPM: 1125 Speed: 3,600 ft/min 1097.28 meters/min Electrical Ground: positive Battery volts: 6

Deere 755	Power: 20 hp	Date of manufacture : 1986 - 1998

Deere 770	Power: 23 hp	Date of manufacture : 1989 - 1998

Deere 790	Power: 30 hp	Date of manufacture : 2000 - 2007

Deere 818	Power: 58 hp	Date of manufacture : 1966 - 1976

Deere 820	Power: 74 hp[B]	Date of manufacture : 1956 - 1958

Deere 820	Power: 32 hp	Date of manufacture : 1968 - 1973

Deere 830	Power: 84 hp[B]	Date of manufacture : 1958 - 1961

Deere 830	Power: 38 hp[P]	Date of manufacture : 1973 - 1975

Deere 830	Power: 35 hp	Date of manufacture : 1974 - 1979