Introduction
Fiat 70-66 Utility Tractor
The Fiat 70-66 is a utility tractor produced between 1985 and 1991, forming part of the manufacturer's 60-66 and 80-66 series. Engineered for versatile agricultural operations, this model was designed to offer a balance of power and mechanical reliability for farm-scale tasks.
Engine and Power
The tractor is powered by a 3.6-liter (220.5 cubic inch), 4-cylinder liquid-cooled diesel engine. It delivers a rated power output of 70 hp (52.2 kW) at 2500 engine RPM. The engine features a bore/stroke ratio of 100 x 115 mm and a compression ratio of 17:1. Electrical systems include a 12-volt battery and a 33-amp charging alternator.
Transmission and Drivetrain
The 70-66 is available in both two-wheel drive and four-wheel drive configurations. It offers three transmission types: a 12-speed partially synchronized unit, a 12-speed mechanical shuttle, and a 20-speed creeper transmission. All variants utilize a four-gear, three-range layout. The drivetrain is supported by power steering and mechanical wet disc brakes to ensure maneuverability and stopping power.
Hydraulics and Hitch
The hydraulic system utilizes an open-center design with a total flow capacity of 11 gpm (41.6 lpm), supporting between one and three valves for implement operation. The rear hitch is a category I/II system equipped with both position and lower-link draft control, providing a total rear lift capacity of 5194 lbs (2355 kg).
Conclusion
The Fiat 70-66 is a robust utility tractor suited for a wide range of standard field and farm maintenance duties. Its combination of multiple transmission options, flexible hydraulic configurations, and a reliable 70 hp power plant makes it a practical machine for operators requiring consistent performance in varying agricultural environments.
Production Information of Fiat-Hesston, 70-66
- Original price was $23,400 in 1990
- Utility tractor
| Distributor | Hesston |
|---|---|
| Manufacturer | Fiat |
Dimension and Tires Information of Fiat-Hesston, 70-66
| 2WD Front tread | 55.1 to 74.75 inches [139 to 189 cm] |
|---|---|
| 2WD Wheelbase | 90.7 inches [230 cm] |
| 2WD Clearance (front axle) | 20.5 inches [52 cm] |
| 4WD Length | 143 inches [363 cm] |
| 4WD Wheelbase | 88.5 inches [224 cm] |
| 4WD Front tread | 60.25 to 77 inches [153 to 195 cm] |
| 4WD Clearance (front axle) | 16.5 inches [41 cm] |
| 2WD Length | 139 inches [353 cm] |
| Rear tread | 55.1 to 78.75 inches [139 to 200 cm] |
| 2WD Standard tires (ag) | Front: 7.50-16. Rear: 14.9-30 |
|---|---|
| 4WD Standard tires (ag) | Front: 9.5-24. Rear: 14.9-30 |
Engine Specifications of Fiat-Hesston, 70-66
- Liquid-cooled
- Diesel
- 4-cylinder
| Starter volts | 12 |
|---|---|
| Displacement | 220.5 ci [3.6 L] |
| Compression | 17:1 |
| Bore/Stroke | 3.937x4.527 inches [100 x 115 mm] |
| Starter | Electric |
| Rated RPM | 2500 |
| Power | 70 hp [52.2 kW] |
Transmission Information of Fiat-Hesston, 70-66
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, 70-66
- Two- or four-wheel drive
- Four-post ROPS. Canopy optional.
- Power steering
- Mechanical wet disc brakes
Power Information of Fiat-Hesston, 70-66
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540/ground |
Hydraulics Specifications of Fiat-Hesston, 70-66
| Type | Open center |
|---|---|
| Valves | 1 to 3 |
| Total flow | 11 gpm [41.6 lpm] |
Three-Point Hitch of Fiat-Hesston, 70-66
| Rear Type | I/II |
|---|---|
| Control | Position and lower-link draft control |
| Rear lift | 5194 lbs [2355 kg] |
Electrical System of Fiat-Hesston, 70-66
| Charging system | Alternator |
|---|---|
| Charging amps | 33 |
| Battery volts | 12 |
Where it sits
With 70 HP, the Fiat-Hesston 70-66 sits between 60-66 (60 HP) and 80-66 (80 HP) in Fiat-Hesston's range. Its power puts it in the 53th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the Fiat-Hesston 70-66 have?
The Fiat-Hesston 70-66 delivers 70 HP.
What years was the Fiat-Hesston 70-66 produced?
The Fiat-Hesston 70-66 was produced in 1985-1991.
What engine does the Fiat-Hesston 70-66 have?
The Fiat-Hesston 70-66 is powered by a Diesel, 4-cylinder engine.
What transmission does the Fiat-Hesston 70-66 use?
The Fiat-Hesston 70-66 uses a Partially synchronized transmission.
Is the Fiat-Hesston 70-66 4WD?
The Fiat-Hesston 70-66 is available in 2WD/4WD.