Power: 68 hp Date of manufacture : 1983 - 1984
Production Distributor: Hesston Manufacturer: Fiat Type: Utility tractor Factory: Modena, Italy Original price: $19,600 (1984) Variants 666DT: 4WD 666HC: high-crop Hesston 666 Power Drawbar (claimed): 54.3 hp 40.5 kW PTO (claimed): 62 hp 46.2 kW Drawbar (tested): 53.13 hp 39.6 kW PTO (tested): 62.40 hp 46.5 kW Hesston 666 Engine Mechanical Chassis: 4x2 2WD   4x4 MFWD 4WD (666DT) Steering: hydrostatic power Brakes: differential mechanical wet disc Cab: Four-post ROPS standard. Optional canopy. Transmissions: 12-speed synchronized   12-speed   20-speed Hydraulics Type: open center Pressure: 2700 psi 186.2 bar Valves: 1 or 2 Pump flow: 11 gpm 41.6 lpm Tractor hitch Rear Type: I/II Power Take-off (PTO) Rear PTO: independent Rear RPM: 540 Dimensions & Tires Wheelbase: 90.7 inches 230 cm (2WD)   88.5 inches 224 cm (4WD) Weight: 5689 to 6350 pounds Front tire: 7.50-16 Rear tire: 14.9-30 Full dimensions and tires ... Electrical Charging system: alternator Charging amps: 33

Hesston 566	Power: 56 hp	Date of manufacture : 1983 - 1984

Hesston 580	Power: 55 hp	Date of manufacture : 1981 - 1984

Hesston 586	Power: 56 hp	Date of manufacture : 0000 - 0000

Hesston 640	Power: 70 hp	Date of manufacture : 1981 - 1984

Hesston 666	Power: 68 hp	Date of manufacture : 1983 - 1984

Hesston 680	Power: 68 hp	Date of manufacture : 1981 - 1984

Hesston 766	Power: 77 hp	Date of manufacture : 1983 - 1984

Hesston 780	Power: 77 hp	Date of manufacture : 1981 - 1984

Hesston 880-5	Power: 88 hp	Date of manufacture : 1981 - 1984