Introduction
Fiat 55-66 Utility Tractor
The Fiat 55-66 is a utility tractor produced between 1985 and 1989 as part of the 60-66 series. Manufactured by Hesston under the Fiat brand, this model was designed to serve as a versatile machine for general agricultural operations.
Engine and Performance
The tractor is powered by the Fiat 8035.06 diesel engine, a 3-cylinder liquid-cooled unit with a 2.7-liter displacement. It produces a rated output of 55 hp (41.0 kW) at 2500 RPM. The engine features a 17:1 compression ratio and utilizes an electric starter with a 12-volt system.
Transmission and Drivetrain
Multiple transmission configurations were offered to accommodate different operational needs: a 12-speed partially synchronized version, a 12-speed mechanical shuttle, and a 20-speed creeper transmission. All configurations utilize a three-range system. The tractor is available in both two-wheel drive and four-wheel drive variants, featuring power steering and mechanical wet disc brakes for operator control.
Hydraulics and Hitch
The hydraulic system is an open-center type providing a total flow of 11 gpm (41.6 lpm) at a pressure of 2700 psi (186.2 bar). It supports up to three valves. The rear hitch is a Category I/II type equipped with both position and lower-link draft control, offering a lift capacity of 3920 lbs (1778 kg).
PTO and Dimensions
The 55-66 is equipped with an independent rear PTO featuring 540 and ground-speed capabilities. Regarding physical dimensions, the 2WD model features an 85.6-inch wheelbase, while the 4WD version has an 83.4-inch wheelbase. The tractor is typically configured with standard agricultural tires suited to its drive configuration.
Conclusion
The Fiat 55-66 is a mid-sized utility tractor engineered for standard field and farmstead tasks. With its range of transmission options and dual-drive configurations, it provides a stable platform for operators requiring a balance of power and maneuverability in a compact agricultural package.
Production Information of Fiat-Hesston, 55-66
- Utility tractor
- Original price was $17,400 in 1990
| Manufacturer | Hesston (a part of Fiat) |
|---|
Dimension and Tires Information of Fiat-Hesston, 55-66
| 2WD Front tread | 55.1 to 74.75 inches [139 to 189 cm] |
|---|---|
| 2WD Wheelbase | 85.6 inches [217 cm] |
| 2WD Clearance (front axle) | 18.5 inches [46 cm] |
| 4WD Length | 133 inches [337 cm] |
| 4WD Wheelbase | 83.4 inches [211 cm] |
| 4WD Front tread | 56.9 to 73.75 inches [144 to 187 cm] |
| 4WD Clearance (front axle) | 14.5 inches [36 cm] |
| 2WD Length | 130 inches [330 cm] |
| Rear tread | 52.1 to 75.75 inches [132 to 192 cm] |
| 2WD Standard tires (ag) | Front: 6.50-16. Rear: 13.6-28 |
|---|---|
| 4WD Standard tires (ag) | Front: 9.5-24. Rear: 16.9-28 |
Engine Specifications of Fiat-Hesston, 55-66
- Fiat 8035.06
- Liquid-cooled
- Diesel
- 3-cylinder
| Starter volts | 12 |
|---|---|
| Displacement | 165 ci [2.7 L] |
| Compression | 17:1 |
| Bore/Stroke | 3.937x4.528 inches [100 x 115 mm] |
| Starter | Electric |
| Rated RPM | 2500 |
| Power | 55 hp [41.0 kW] |
Transmission Information of Fiat-Hesston, 55-66
Transmission variants 1
- Four gears (1-4) in three ranges (I-III). Shifts between gears are synchronized.
| Type | Partially synchronized |
|---|---|
| Gears | 12 forward and 4 reverse |
Transmission variants 2
- Four gears (1-4) in three ranges (I-III) with shuttle.
| Type | Mechanical shuttle |
|---|---|
| Gears | 12 forward and reverse |
Transmission variants 3
- Four gears (1-4) in three ranges (I-III) with normal and creeper ranges.
| Type | Creeper |
|---|---|
| Gears | 20 forward and 8 reverse |
- 12-speed partially synchronized
- 12-speed mechanical shuttle
- 20-speed creeper
Mechanical Specs of Fiat-Hesston, 55-66
- Two- or four-wheel drive
- Four-post ROPS. Canopy optional.
- Power steering
- Mechanical wet disc brakes
Power Information of Fiat-Hesston, 55-66
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540/ground |
Hydraulics Specifications of Fiat-Hesston, 55-66
| Type | Open center |
|---|---|
| Total flow | 11 gpm [41.6 lpm] |
| Pressure | 2700 psi [186.2 bar] |
| Valves | 0 to 3 |
Three-Point Hitch of Fiat-Hesston, 55-66
| Rear Type | I/II |
|---|---|
| Control | Position and lower-link draft control |
| Rear lift | 3920 lbs [1778 kg] |
Electrical System of Fiat-Hesston, 55-66
| Charging system | Alternator |
|---|---|
| Charging amps | 33 |
| Battery volts | 12 |
Where it sits
With 55 HP, the Fiat-Hesston 55-66 sits just below 60-66 (60 HP) in Fiat-Hesston's range. Its power puts it in the 39th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the Fiat-Hesston 55-66 have?
The Fiat-Hesston 55-66 delivers 55 HP.
What years was the Fiat-Hesston 55-66 produced?
The Fiat-Hesston 55-66 was produced in 1985-1989.
What engine does the Fiat-Hesston 55-66 have?
The Fiat-Hesston 55-66 is powered by a Diesel, 3-cylinder engine.
What transmission does the Fiat-Hesston 55-66 use?
The Fiat-Hesston 55-66 uses a Partially synchronized transmission.
Is the Fiat-Hesston 55-66 4WD?
The Fiat-Hesston 55-66 is available in 2WD/4WD.