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Hesston 666

Hesston 666 tractor
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The Hesston 666 is a utility tractor built by Fiat and distributed by Hesston from 1983 to 1984. It was manufactured in Modena, Italy. The tractor features a Fiat 3.5L 4-cylinder liquid-cooled diesel engine producing an estimated 68.9 hp. It offers multiple transmission options including 12-speed synchronized and 20-speed variants. The 666 model is available in 2WD and 4WD (666DT) configurations, with hydrostatic power steering and differential mechanical wet disc brakes. It has a rear independent PTO with 540 rpm and an open center hydraulic system with 2700 psi pressure. The tractor's dimensions vary slightly between 2WD and 4WD models, with wheelbases of 90.7 inches and 88.5 inches respectively, and operating weights ranging from 5,689 to 6,350 pounds. The 666 also comes in a high-crop variant (666HC).
Hesston 666Fiat tractorutility tractor3.5L diesel engine12-speed transmission4WDtractor specifications
Power68 hp[P]
Founded1983 - 1984
Model666

Technical Specifications

Detailed specifications and technical data for Hesston 666

Power

PTO (tested):62.40 hp (46.5 kW)
PTO (claimed):62 hp (46.2 kW)
Drawbar (tested):53.13 hp (39.6 kW)
Drawbar (claimed):54.3 hp (40.5 kW)

Engine

Type:diesel
Model:Fiat 8045.02
Cooling:liquid-cooled
Cylinders:4-cylinder
Fuel tank:19.2 gal (72.7 L)
Bore/Stroke:3.94x4.33 inches (100 x 110 mm)
Displacement:211 ci (3.5 L)
Starter volts:12

Height

Hood:59 inches (149 cm)
Exhaust:96 inches (2WD) (243 cm), 97 inches (4WD) (246 cm)

Variants

666DT:4WD
666HC:high-crop

Electrical

Charging amps:33
Charging system:alternator

Hydraulics

Type:open center
Valves:1 or 2
Pressure:2700 psi (186.2 bar)
Pump flow:11 gpm (41.6 lpm)

Mechanical

ROPS:Four-post ROPS standard. Optional canopy.
Drive:4x2 2WD, 4x4 MFWD 4WD (666DT)
Brakes:Differential mechanical wet disc brakes
Steering:hydrostatic power

Production

Type:Utility tractor
Built in:Modena, Italy
Distributor:Hesston
Manufacturer:Fiat
Original price:$19,600 (1984)
Production years:1983 - 1984

Transmission

Type:synchronized
Gears:12 forward and 4 reverse
Options:12-speed synchronized, 12-speed, 20-speed
Additional info:Four synchronized gears in three ranges.

Tractor hitch

Rear Type:I/II

Dimensions & Tires

Length:139 inches (2WD) (353 cm), 143 inches (4WD) (363 cm)
Rear tire:14.9-30
Wheelbase:90.7 inches (2WD) (230 cm), 88.5 inches (4WD) (224 cm)
Front tire:7.50-16 (2WD), 9.5-24 (4WD)
Ground clearance:23 inches (2WD front axle) (58 cm), 19 inches (4WD front axle) (48 cm), 16 inches (4WD front differential) (40 cm)
Operating weight:5,689 lbs (2WD) (2580 kg), 6,350 lbs (4WD) (2880 kg)

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:540

Related Models

Hesston 566

Model:566

Hesston 766

Model:766