| Manufacturer | Hesston |
| Price | 23,400(USD) |
| Model | 70-66 |
| Equipment Type | Utility Tractors |
| Factory |
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 | 62.72 hp/46.8 kW |
| Fuel use | 3.7 gal/hour/14.0 l/hour |
| Power at rated PTO speed | 62.71 hp/46.8 kW |
| Max power | 54.22 hp/40.4 kW |
HESSTON 70-66 POWER
| Engine | 70 hp/52.2 kW |
| Drawbar (claimed) | 54 hp/40.3 kW |
| PTO (claimed) | 62.7 hp/46.8 kW |
| Drawbar (tested) | 54.22 hp/40.4 kW |
| PTO (tested) | 62.72 hp/46.8 kW |
ENGINE DETAIL
The Hesston 70-66 tractor, powered by a Fiat 8045.06 diesel engine with a 220.5 ci (3.6 L) displacement, offers a robust 70 hp (52.2 kW) at a rated RPM of 2500, making it suitable for various agricultural tasks. The 17:1 compression ratio enhances fuel efficiency and torque delivery, beneficial for heavy-duty applications. However, potential challenges include maintenance of the liquid-cooled system and ensuring the electrical starter's reliability in cold weather scenarios.
| Description | Fiat 8045.06/diesel/4-cylinder/liquid-cooled |
| Displacement | 220.5 ci/3.6 L |
| Bore/Stroke | 3.937x4.527 inches/100 x 115 mm |
| Power | 70 hp/52.2 kW |
| Compression | 17:1 |
| Rated RPM | 2500 |
| Starter | electric |
| Starter volts | 12 |
HESSTON 70-66 ENGINE
The Hesston 70-66 tractor features a Fiat 3.6L 4-cylinder diesel engine, which provides robust torque and fuel efficiency ideal for medium to heavy-duty agricultural tasks. Its 19.2-gallon (72.7 L) fuel tank capacity allows for extended operation without frequent refueling, making it suitable for prolonged fieldwork. However, potential challenges may include sourcing specific Fiat engine parts and technical support, common in vintage models.
| Description | Fiat 3.6L 4-cyl diesel |
| Fuel tank | 19.2 gal/72.7 L |
TRANSMISSIONS OVERVIEW
The Hesston 70-66 tractor features a versatile 12-speed partially synchronized transmission, allowing for smooth gear shifts and efficient speed adjustment in varied conditions. The mechanical shuttle adds operational convenience for quick direction changes, ideal for tasks like baling or loader work. However, while the 20-speed creeper option enhances low-speed control for precision tasks, it may reduce top-end speed and require more frequent shifts in certain applications.
| Description | 12-speed partially synchronized/12-speed mechanical shuttle/20-speed creeper |
TRANSMISSION 1
The Hesston 70-66 features a partially synchronized transmission with 12 forward and 4 reverse gears, allowing for smooth shifts between gears within its three ranges (I-III). The synchronization aids in minimizing gear grinding during shifts, which can be advantageous for operators seeking enhanced control and efficiency. However, the limited range of gears may pose challenges in specific applications requiring rapid speed changes or high torque.
| 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 Hesston 70-66 features a mechanical shuttle transmission, providing operators with enhanced control for quick direction changes, ideal for tasks like loader work. With a total of 12 forward and reverse gears distributed across three ranges (I-III), it enables efficient speed adjustments and adaptability for various field conditions. However, the mechanical nature of the shuttle may require more operator skill compared to modern electronic systems, which might limit ease of use for less experienced operators.
| 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 Hesston 70-66 tractor features a sophisticated transmission system with 20 forward gears and 8 reverse gears, allowing for fine-tuned speed control, which is particularly advantageous in tasks requiring precision, such as planting or tilling. The presence of a creeper gear enhances its capability for low-speed operations, making it ideal for maneuvering in tight spaces or handling delicate tasks without risking damage to the ground or equipment. However, operators must be aware of the potential complexity in gear selection, which may lead to a steeper learning curve for new users.
| 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 Hesston 70-66 tractor features a versatile 4x2 2WD/4x4 MFWD configuration, allowing for enhanced traction in varied terrain but may increase complexity and cost of maintenance compared to simpler 2WD models. Its power steering provides improved maneuverability, while the mechanical wet disc brakes offer reliable stopping power, albeit requiring proper maintenance to prevent wear. With options for a 12-speed partially synchronized or a 20-speed creeper transmission, this tractor is well-suited for both standard farming applications and tasks requiring precise control at low speeds, making it ideal for close-quarters work such as cultivating or planting.
| 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 | 11 gpm/41.6 lpm |
TRACTOR HITCH
| Rear Type | I/II |
| Control | position and lower-link draft control |
| Rear lift | 5194 lbs/2355 kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/ground |
HESSTON 70-66 TIRES
The Hesston 70-66 tractor offers options for both 2WD and 4WD configurations, with standard agricultural tires that cater to various terrain requirements. The 4WD variant, equipped with larger front tires (9.5-24), provides enhanced traction and stability, making it ideal for loose or uneven ground where increased pulling power is essential. However, the 2WD model may be more cost-effective for flat terrain, though it could experience limitations in traction and maneuverability under challenging conditions.
| 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 | 90.7 inches/230 cm |
| 4WD Wheelbase | 88.5 inches/224 cm |
| 2WD Length | 139 inches/353 cm |
| 4WD Length | 143 inches/363 cm |
| 2WD Clearance (front axle) | 20.5 inches/52 cm |
| 4WD Clearance (front axle) | 16.5 inches/41 cm |
| 2WD Front tread | 55.1 to 74.75 inches/139 to 189 cm |
| 4WD Front tread | 60.25 to 77 inches/153 to 195 cm |
| Rear tread | 55.1 to 78.75 inches/139 to 200 cm |
HESSTON 70-66 WEIGHT
| 2WD Shipping | 5689 lbs/2580 kg |
| 4WD Shipping | 6350 lbs/2880 kg |
| 4WD Operating | 6510 lbs/2952 kg |
| Ballasted | 8705 lbs/3948 kg |
HESSTON 70-66 HEIGHT
| Steering wheel | 65 inches/165 cm |
| Hood | 59 inches/149 cm |
| ROPS | 97.5 inches/247 cm |
DIMENSIONS & TIRES
The Hesston 70-66 tractor, available in both 2WD and 4WD configurations, features a relatively agile wheelbase, with 2WD at 90.7 inches and 4WD at 88.5 inches, enhancing maneuverability in tight spaces. Its weight range of 5,689 to 6,510 pounds provides stability during operation, but may limit transportability without proper trailers. The tire specifications (7.50-16 front and 14.9-30 rear) indicate a strong traction capability for fieldwork, although rear tire size could restrict its usability in softer soil conditions.
| 2WD Wheelbase | 90.7 inches/230 cm |
| 4WD Wheelbase | 88.5 inches/224 cm |
| 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 |