| Manufacturer |
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 Hesston 666 tractor is powered by a Fiat 8045.02 diesel engine with a displacement of 211 cubic inches (3.5L), providing a robust torque performance suitable for moderate to heavy-duty agricultural tasks. Its 4-cylinder design, coupled with a bore/stroke ratio of 3.94x4.33 inches (100x110 mm), facilitates efficient combustion and effective power delivery, although potential challenges may include higher maintenance demands for liquid-cooled systems in extreme climates. The 12-volt starter system is standard for many tractors, ensuring consistent starting reliability but may limit compatibility with certain aftermarket electrical accessories.
| 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 Hesston 666 tractor is powered by a Fiat 3.5L 4-cylinder diesel engine, offering a balance between power and fuel efficiency for various agricultural tasks. Its 19.2-gallon (72.7L) fuel tank provides extended operation time, reducing the frequency of refueling during intensive workloads. However, operators should note that the compact engine size may limit performance under heavy loads compared to larger models, making it ideal for moderate applications.
| Description |
Fiat 3.5L 4-cyl diesel |
| Fuel tank |
19.2gal / 72.7L |
TRANSMISSIONS OVERVIEW
The Hesston 666 tractor features a 12-speed synchronized transmission, offering smooth gear shifts for improved operational efficiency. The 20-speed option provides greater versatility for varying field conditions, allowing for optimized power management and fuel efficiency. However, the complexity of the 20-speed system may present maintenance challenges, requiring more expertise to service effectively.
| Description |
12-speed synchronized 12-speed 20-speed |
TRANSMISSION 1
The Hesston 666 tractor features a synchronized transmission with a total of 12 forward and 4 reverse gears, allowing for precise speed control and improved maneuverability in varied field conditions. The four synchronized gears across three ranges facilitate smooth shifting during operation, enhancing productivity. However, operators may need to familiarize themselves with the gear ratios to maximize efficiency, especially in tasks requiring frequent directional changes.
| Type |
synchronized |
| Gears |
12 forward and 4 reverse |
| Description |
Four synchronized gears in three ranges |
TRANSMISSION 2
The Hesston 666 tractor features a 12-speed transmission with both forward and reverse gears, allowing for versatile operation and adaptability across various agricultural tasks. The multiple gear options facilitate efficient speed control, enhancing productivity during fieldwork. However, the complexity of the transmission may pose a learning curve for inexperienced operators, requiring thorough training for optimal use.
| Gears |
12 forward and reverse |
TRANSMISSION 3
The Hesston 666 tractor features a versatile transmission with 20 forward and 8 reverse gears, providing a wide range of speed options and facilitating precise control for various agricultural tasks. This extensive gearing can enhance field efficiency but may present a learning curve for operators unfamiliar with such a range. Ideal for diverse applications from tillage to hauling, the gearing system supports both high-speed transport and low-speed, high-torque operations.
| Gears |
20 forward and 8 reverse |
MECHANICAL
The Hesston 666 tractor offers versatile drivetrain options with 2WD, MFWD, or 4WD configurations, enhancing traction in varied terrains. Its hydrostatic power steering provides superior maneuverability, while the 12 to 20-speed transmission options allow for tailored speed and efficiency based on task requirements. A key consideration is the differential mechanical wet disc braking system, which ensures reliable stopping power under heavy loads, though maintenance may be more complex compared to simpler systems.
| 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 Hesston 666 tractor features front tire options of 7.50-16 for 2WD and 9.5-24 for 4WD, paired with robust 14.9-30 rear tires, providing excellent traction and stability in various agricultural applications. The choice of 4WD enhances maneuverability in challenging terrain but may increase maintenance complexity and operational costs when compared to the 2WD variant. This model is well-suited for mid-sized farms, offering a balance between power and efficiency for tasks like plowing and planting.
| 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 Hesston 666 tractor features a wheelbase of 90.7 inches for 2WD models and 88.5 inches for 4WD models, providing stability in off-road conditions, particularly beneficial for tilling and plowing tasks. Weighing between 5,689 to 6,350 pounds, this tractor offers a solid foundation for pulling heavier implements, though the higher weight may impact mobility on soft or uneven terrain. The specified tire sizes (7.50-16 front and 14.9-30 rear) enhance traction and flotation, but users should consider potential tire wear and replacement costs based on usage and soil conditions.
| 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 |
