| Manufacturer |
Fiat-Hesston |
| Price |
19,600(USD) |
| Model |
666 |
| Equipment Type |
Utility Tractors |
| Factory |
Modena, Italy |
VARIANTS
NEBRASKA TRACTOR TEST 1485
| Description |
Diesel 12-speed 4WD June 6 - 17, 1983 Link: Nebraska Tractor Test 1485 file PTO performance Drawbar performance |
| Power at rated engine speed |
62.40hp / 46.5kW |
| Fuel use |
3.9gal/hour / 14.8l/hour |
| Power at rated PTO speed |
60.33hp / 45.0kW |
| Max power |
53.13hp / 39.6kW |
HESSTON 666 POWER
| Drawbar (claimed) |
54.3hp / 40.5kW |
| PTO (claimed) |
62hp / 46.2kW |
| Drawbar (tested) |
53.13hp / 39.6kW |
| PTO (tested) |
62.40hp / 46.5kW |
ENGINE DETAIL
The Fiat-Hesston 666 features a 4-cylinder, 3.5L Fiat 8045.02 diesel engine, providing a robust power-to-weight ratio ideal for medium-duty agricultural applications. With a bore and stroke of 3.94x4.33 inches, the engine design promotes efficient fuel combustion and torque delivery but may face challenges in longevity under prolonged heavy loads. A 12-volt starter enhances cold cranking efficiency, crucial for reliable operation in various weather conditions; however, the system may require careful maintenance to prevent starter failures.
| Description |
Fiat 8045.02 diesel 4-cylinder liquid-cooled |
| Displacement |
211ci / 3.5L |
| Bore/Stroke |
3.94x4.33inches / 100x 110 mm |
| Starter volts |
12 |
HESSTON 666 ENGINE
The Fiat-Hesston 666 tractor is powered by a reliable 3.5L 4-cylinder diesel engine, offering adequate torque for moderate agricultural tasks while maintaining fuel efficiency. Its 19.2-gallon (72.7L) fuel tank allows for extended operational hours on the field, making it suitable for longer agricultural operations between refueling. However, the limited horsepower might challenge its performance in heavy-duty applications, requiring careful consideration of the workload and attachment compatibility.
| Description |
Fiat 3.5L 4-cyl diesel |
| Fuel tank |
19.2gal / 72.7L |
TRANSMISSIONS OVERVIEW
The Fiat-Hesston 666 tractor features a robust 12-speed synchronized transmission, allowing for smooth gear shifts and versatility across various terrains. The possibility of a 20-speed option enhances its adaptability for different agricultural applications, providing increased torque management and efficiency during operations. However, the complexity of the gear system may present maintenance challenges that require skilled technicians for optimal performance.
| Description |
12-speed synchronized 12-speed 20-speed |
TRANSMISSION 1
The Fiat-Hesston 666 tractor features a synchronized transmission with 12 forward and 4 reverse gears, allowing for smooth gear shifting and versatility in various field applications. Its design of four synchronized gears across three ranges provides improved operational efficiency, particularly in tasks requiring frequent speed adjustments, such as plowing or hauling. However, the complexity of the gear system may pose a challenge for novice operators who are unfamiliar with synchronized transmissions.
| Type |
synchronized |
| Gears |
12 forward and 4 reverse |
| Description |
Four synchronized gears in three ranges. |
TRANSMISSION 2
The Fiat-Hesston 666 tractor features a 12-speed transmission providing both forward and reverse gears, enhancing maneuverability for varied agricultural tasks. The wide gear selection allows for precise speed control, which is advantageous for applications requiring delicate operation, such as planting or tilling. However, operators must also consider potential challenges in mastering gear shifting for optimal performance across different tasks.
| Gears |
12 forward and reverse |
TRANSMISSION 3
The Fiat-Hesston 666 tractor features a gear range of 20 forward and 8 reverse, providing versatile options for varying field tasks and conditions. The extensive forward gears facilitate efficient speed selection for both heavy-duty and precision operations, while the reverse gears enhance maneuverability in tight spaces. However, the complexity of the transmission system may require additional operator training to optimize gear selection and prevent potential shifting issues.
| Gears |
20 forward and 8 reverse |
MECHANICAL
The Fiat-Hesston 666 tractor features a robust chassis available in both 2WD and 4WD configurations, providing versatility for various terrain types; the 4WD option (666DT) enhances traction and stability in challenging conditions. It is equipped with hydrostatic power steering for ease of maneuverability, and differential mechanical wet disc brakes offer reliable stopping power, especially useful during heavy operations. The optional canopy enhances operator safety, while the choice of 12-speed synchronized, 12-speed, or 20-speed transmissions allows for tailored speed control, crucial for optimizing performance in field applications.
| Chassis |
4x2 2WD/4x4 MFWD 4WD (666DT) |
| Steering |
hydrostatic power |
| Brakes |
differential mechanical wet disc |
| Cab |
Four-post ROPS standard. Optional canopy. |
| Transmissions |
12-speed synchronized/12-speed/20-speed |
HYDRAULICS
| Type |
open center |
| Pressure |
2700psi / 186.2bar |
| Valves |
1 or 2 |
| Pump flow |
11gpm / 41.6lpm |
TRACTOR HITCH
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540 |
HESSTON 666 TIRES
The Fiat-Hesston 666 tractor, equipped with 7.50-16 front tires (2WD) or 9.5-24 (4WD) and 14.9-30 rear tires, showcases versatility in both two-wheel and four-wheel drive configurations. The larger rear tires provide enhanced traction and stability for field operations, while the optional 4WD setup allows for improved performance in challenging terrains and wetter conditions. However, the 2WD variant may lack the traction needed on inclines or muddy fields, making it less suitable for intensive agricultural tasks.
| Ag front |
7.50-16 (2WD)/9.5-24 (4WD) |
| Ag rear |
14.9-30 |
DIMENSIONS
| Wheelbase |
90.7inches / 230cm (2WD)/88.5inches / 224cm (4WD) |
| Length |
139inches / 353cm (2WD)/143inches / 363cm (4WD) |
| Operating weight |
5,689lbs / 2580kg (2WD)/6,350lbs / 2880kg (4WD) |
| Ground clearance |
23inches / 58cm (2WD front axle)/19inches / 48cm (4WD front axle)/16inches / 40cm (4WD front differential) |
HESSTON 666 HEIGHT
| Hood |
59inches / 149cm |
| Exhaust |
96inches / 243cm (2WD)/97inches / 246cm (4WD) |
DIMENSIONS & TIRES
The Fiat-Hesston 666 tractor features a wheelbase of 90.7 inches for 2WD and 88.5 inches for 4WD, offering stability and maneuverability in various field operations. Weighing between 5,689 to 6,350 pounds, this tractor provides good traction but may limit mobility on softer terrain. The front and rear tire sizes (7.50-16 and 14.9-30 respectively) enhance overall grip and support heavy loads, making it suitable for both plowing and transporting tasks.
| Wheelbase |
90.7inches / 230cm (2WD)/88.5inches / 224cm (4WD) |
| Weight |
5689 to 6350 pounds |
| Front tire |
7.50-16 |
| Rear tire |
14.9-30 |
ELECTRICAL
| Charging system |
alternator |
| Charging amps |
33 |
