| Manufacturer | Fiat-Hesston |
| Price | 23,400(USD) |
| Model | 70-66 |
| Equipment Type | Utility Tractors |
| Factory | Fiat |
VARIANTS
| 70-66 | utility 2WD[6073] |
| 70-66DT | high-crop 4WD |
NEBRASKA TRACTOR TEST 1561
| Description | Diesel 12-speed 4WD April 17 - May 1, 1985 PTO performance Drawbar performance |
| Power at rated engine speed | 62.72hp / 46.8kW |
| Fuel use | 3.7gal/hour / 14.0l/hour |
| Power at rated PTO speed | 62.71hp / 46.8kW |
| Max power | 54.22hp / 40.4kW |
HESSTON 70-66 POWER
| Engine | 70hp / 52.2kW |
| Drawbar (claimed) | 54hp / 40.3kW |
| PTO (claimed) | 62.7hp / 46.8kW |
| Drawbar (tested) | 54.22hp / 40.4kW |
| PTO (tested) | 62.72hp / 46.8kW |
ENGINE DETAIL
The Fiat-Hesston 70-66 is powered by a 3.6L Fiat 8045.06 diesel engine, delivering 70hp at 2500 RPM with a high compression ratio of 17:1, facilitating efficient fuel combustion and torque generation. The electric starter system operates at 12 volts, ensuring reliable starting under various conditions. Pros include robust performance for light to medium agricultural tasks, while potential challenges could arise from maintenance of the liquid-cooled system and availability of specific parts, due to its unique specifications.
| Description | Fiat 8045.06 diesel 4-cylinder liquid-cooled |
| Displacement | 220.5ci / 3.6L |
| Bore/Stroke | 3.937x4.527inches / 100 x 115mm |
| Power | 70hp / 52.2kW |
| Compression | 17:1 |
| Rated RPM | 2500 |
| Starter | electric |
| Starter volts | 12 |
HESSTON 70-66 ENGINE
The Fiat-Hesston 70-66 tractor is powered by a robust 3.6L 4-cylinder diesel engine, providing a solid balance of power and fuel efficiency for medium-sized agricultural tasks. With a 19.2-gallon fuel tank, operators can expect extended run times between refueling, ideal for larger field operations. However, be mindful of parts availability and possible maintenance challenges given its specific manufacturer model.
| Description | Fiat 3.6L 4-cyl diesel |
| Fuel tank | 19.2gal / 72.7L |
TRANSMISSIONS OVERVIEW
The Fiat-Hesston 70-66 tractor features a 12-speed partially synchronized transmission and a 12-speed mechanical shuttle, providing optimal control for various field operations. With a 20-speed creeper option, it excels in applications requiring low-speed precision, such as planting or tilling. Challenges may arise in maintenance complexity due to the multi-speed transmission system, but its versatility offers significant advantages for diverse agricultural tasks.
| Description | 12-speed partially synchronized / 12-speed mechanical shuttle / 20-speed creeper |
TRANSMISSION 1
The Fiat-Hesston 70-66 features a partially synchronized transmission, providing 12 forward and 4 reverse gears across three ranges, which facilitates smoother gear shifts and enhances operational efficiency, especially in varied terrain. A key advantage is the ability to select the optimal gear for different work scenarios, providing versatility for tasks such as plowing or hauling. However, the partially synchronized system may present challenges in precision shifting under heavy load, potentially affecting performance in demanding operational conditions.
| Type | partially synchronized |
| Gears | 12 forward and 4 reverse |
| Description | Four gears (1-4) in three ranges (I-III). Shifts between gears are synchronized |
SPEEDS 1
| Description | With 16.9-30 rear tires |
TRANSMISSION 2
The Fiat-Hesston 70-66 features a mechanical shuttle with 12 forward and reverse gears, allowing for precise control and rapid direction changes, ideal for tasks requiring frequent stops and starts. The four gears across three ranges offer versatility for various applications, from heavy tillage to transport, though it may present challenges in terms of driver learning curve for optimal use. Consider leveraging its robust gearbox for efficient power distribution, particularly in demanding field scenarios or when operating heavy implements.
| Type | mechanical shuttle |
| Gears | 12 forward and reverse |
| Description | Four gears (1-4) in three ranges (I-III) with shuttle |
SPEEDS 2
| Description | With 16.9-30 rear tires |
TRANSMISSION 3
The Fiat-Hesston 70-66 tractor features a creeper transmission that provides enhanced control for low-speed operations, ideal for tasks requiring precision, such as plowing or cultivating. With 20 forward and 8 reverse gears distributed across four speeds in three ranges, operators benefit from versatile speed management for various agricultural applications. However, the complexity of the gear system may present a learning curve for new operators, particularly when shifting between normal and creeper ranges.
| Type | creeper |
| Gears | 20 forward and 8 reverse |
| Description | Four gears (1-4) in three ranges (I-III) with normal and creeper ranges |
SPEEDS 3
| Description | With 16.9-30 rear tires |
MECHANICAL
The Fiat-Hesston 70-66 tractor features versatile drive options with both 2WD and MFWD configurations, offering enhanced traction and stability depending on terrain conditions. Its 12-speed partially synchronized transmission provides smooth gear transitions, while the 20-speed creeper option allows for precise low-speed operation, ideal for applications like tilling or planting. The power steering and mechanical wet disc brakes contribute to improved maneuverability and safety, though the mechanical braking system may require more maintenance compared to hydraulic alternatives.
| Chassis | 4x2 2WD/4x4 MFWD 4WD |
| Steering | power |
| Brakes | mechanical wet disc |
| Cab | Four-post ROPS. Canopy optional |
| Transmissions | 12-speed partially synchronized / 12-speed mechanical shuttle / 20-speed creeper |
HYDRAULICS
| Type | open center |
| Valves | 1 to 3 |
| Total flow | 11gpm / 41.6lpm |
TRACTOR HITCH
| Rear Type | I/II |
| Control | position and lower-link draft control |
| Rear lift | 5194lbs / 2355kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/ground |
HESSTON 70-66 TIRES
The Fiat-Hesston 70-66 tractor offers flexibility with both 2WD and 4WD configurations, enhancing versatility for various agricultural tasks. The 2WD setup features narrower front tires (7.50-16) for tighter maneuverability, while the 4WD variant with wider front tires (9.5-24) provides improved traction on uneven terrain, making it more suitable for challenging field conditions. However, the 4WD configuration may introduce additional complexity in maintenance and potential higher operational costs compared to the simpler 2WD setup.
| 2WD Standard tires (ag) | Front: 7.50-16. Rear: 14.9-30 |
| 4WD Standard tires (ag) | Front: 9.5-24. Rear: 14.9-30 |
DIMENSIONS
| 2WD Wheelbase | 90.7inches / 230cm |
| 4WD Wheelbase | 88.5inches / 224cm |
| 2WD Length | 139inches / 353cm |
| 4WD Length | 143inches / 363cm |
| 2WD Clearance (front axle) | 20.5inches / 52cm |
| 4WD Clearance (front axle) | 16.5inches / 41cm |
| 2WD Front tread | 55.1 to 74.75inches / 139 to 189cm |
| 4WD Front tread | 60.25 to 77inches / 153 to 195cm |
| Rear tread | 55.1 to 78.75inches / 139 to 200cm |
HESSTON 70-66 WEIGHT
| 2WD Shipping | 5689lbs / 2580kg |
| 4WD Shipping | 6350lbs / 2880kg |
| 4WD Operating | 6510lbs / 2952kg |
| Ballasted | 8705lbs / 3948kg |
HESSTON 70-66 HEIGHT
| Steering wheel | 65inches / 165cm |
| Hood | 59inches / 149cm |
| ROPS | 97.5inches / 247cm |
DIMENSIONS & TIRES
The Fiat-Hesston 70-66 tractor features a robust 90.7-inch wheelbase for 2WD, enhancing stability during field operations, while the 4WD version's shorter wheelbase at 88.5 inches may improve maneuverability in tight spaces. Weighing between 5,689 and 6,510 pounds, it provides significant traction and stability, though the weight may pose challenges in soft or uneven terrain. With front tires sized at 7.50-16 and rear tires at 14.9-30, this tractor is well-suited for various applications, though rear tire size may limit some high-traction performance compared to larger tire options.
| 2WD Wheelbase | 90.7inches / 230cm |
| 4WD Wheelbase | 88.5inches / 224cm |
| Weight | 5689 to 6510 pounds |
| Front tire | 7.50-16 |
| 2WD Rear tire | 14.9-30 |
ELECTRICAL
| Charging system | alternator |
| Charging amps | 33 |
| Battery volts | 12 |