Fiat-Hesston
Hesston 666
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).
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 |