Introduction
Fiat 666 Utility Tractor
The Fiat 666 is a utility tractor produced between 1983 and 1984 in Modena, Italy, and distributed under the Hesston brand. Part of the 566-766 series, this machine was designed for general agricultural operations, offering a balance of power and mechanical versatility.
Engine and Performance
The tractor is powered by the Fiat 8045.02, a 3.5-liter, 4-cylinder liquid-cooled diesel engine. It delivers 68 horsepower, providing consistent performance for standard field tasks. The electrical system is supported by a 33-amp alternator and a 12-volt starter.
Transmission and Drivetrain
The drivetrain is available in either 4x2 2WD or 4x4 MFWD configurations. It features a synchronized transmission with several gear options, ranging from a 12-forward and 4-reverse setup to a 20-forward and 8-reverse configuration, allowing for precise speed selection during operation. Steering is managed by a hydrostatic power system.
Hydraulics and PTO
The hydraulic system utilizes an open-center design with a pump flow of 11 gpm (41.6 lpm) at a pressure of 2700 psi, supporting one or two valves. The tractor is equipped with an independent rear PTO operating at 540 rpm and a Category I/II rear hitch.
Dimensions and Chassis
The 2WD variant has a wheelbase of 90.7 inches and an operating weight of 5,689 lbs, while the 4WD model features a longer wheelbase of 88.5 inches (measured differently due to front axle configuration) and a weight of 6,350 lbs. The machine comes standard with a four-post ROPS for operator safety, with an optional canopy available.
Conclusion
The Fiat 666 is a reliable, straightforward utility tractor suited for small to medium-sized agricultural operations requiring a versatile machine with multiple transmission configurations and a proven diesel engine.
Production Information of Fiat-Hesston, 666
- Built in Modena, Italy
- Utility tractor
| Distributor | Hesston |
|---|---|
| Original price | $19,600 (1984) |
| Manufacturer | Fiat |
Dimension and Tires Information of Fiat-Hesston, 666
| Ground clearance | 23 inches (2WD front axle) [58 cm] |
|---|---|
| Wheelbase | 90.7 inches (2WD) [230 cm] |
| Operating weight | 5,689 lbs (2WD) [2580 kg] |
| Operating weight(optional) | 143 inches (4WD) [363 cm] |
| Operating weight(optional) | 88.5 inches (4WD) [224 cm] |
| Operating weight(optional) | 19 inches (4WD front axle) [48 cm] |
| Operating weight(optional) | 6,350 lbs (4WD) [2880 kg] |
| Length | 139 inches (2WD) [353 cm] |
| Length(optional) | 16 inches (4WD front differential) [40 cm] |
| Ag front | 7.50-16 (2WD) |
|---|---|
| Ag front(optional) | 9.5-24 (4WD) |
| Ag rear | 14.9-30 |
Engine Specifications of Fiat-Hesston, 666
- Fiat 8045.02
- Liquid-cooled
- Diesel
- 4-cylinder
| Starter volts | 12 |
|---|---|
| Displacement | 211 ci [3.5 L] |
| Bore/Stroke | 3.94x4.33 inches [100 x 110 mm] |
Transmission Information of Fiat-Hesston, 666
Transmission variants 1
- Four synchronized gears in three ranges.
| Type | Synchronized |
|---|---|
| Gears | 12 forward and 4 reverse |
Transmission variants 2
| Gears | 12 forward and reverse |
|---|
Transmission variants 3
| Gears | 20 forward and 8 reverse |
|---|
- 12-speed synchronized
- 12-speed
- 20-speed
Mechanical Specs of Fiat-Hesston, 666
- Four-post ROPS standard. Optional canopy.
- Differential mechanical wet disc brakes
| Drive | 4x2 2WD |
|---|---|
| Drive(optional) | 4x4 MFWD 4WD (666DT) |
| Steering | Hydrostatic power |
Power Information of Fiat-Hesston, 666
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540 |
Hydraulics Specifications of Fiat-Hesston, 666
| Type | Open center |
|---|---|
| Pump flow | 11 gpm [41.6 lpm] |
| Pressure | 2700 psi [186.2 bar] |
| Valves | 1 or 2 |
Three-Point Hitch of Fiat-Hesston, 666
| Rear Type | I/II |
|---|
Electrical System of Fiat-Hesston, 666
| Charging system | Alternator |
|---|---|
| Charging amps | 33 |
Where it sits
With 68 hp[P] HP, the Fiat-Hesston 666 sits between 566 (56 HP) and 766 (77 HP) in Fiat-Hesston's range. Its power puts it in the 50th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the Fiat-Hesston 666 have?
The Fiat-Hesston 666 delivers 68 hp[P] HP.
What years was the Fiat-Hesston 666 produced?
The Fiat-Hesston 666 was produced in 1983-1984.
What engine does the Fiat-Hesston 666 have?
The Fiat-Hesston 666 is powered by a Diesel, 4-cylinder engine.
What transmission does the Fiat-Hesston 666 use?
The Fiat-Hesston 666 uses a Synchronized transmission.
How much does the Fiat-Hesston 666 weigh?
The Fiat-Hesston 666 weighs 5,689 lbs (2WD) [2580 kg].
Is the Fiat-Hesston 666 4WD?
The Fiat-Hesston 666 is available in 2WD/4WD.