Overview
The Hesston 666 is a versatile Italian-built utility tractor featuring a robust 3.5L 4-cylinder Fiat diesel engine and a 12-speed synchronized transmission. Offering a tested 62.40 PTO horsepower and a Category I/II rear hitch, this 1980s-era machine is designed for reliable performance in a variety of farm applications.
Ideal Applications
Field Work:
Utilizing a tested drawbar power of 53.13 hp and a 12-speed synchronized transmission, this tractor provides the mechanical efficiency needed for various soil-based tasks.
PTO-Driven Operations:
With an independent 540 RPM rear PTO delivering a tested 62.40 hp at rated engine speed, it is well-suited for powering specialized implements and machinery.
Maneuvering and Utility:
Equipped with hydrostatic power steering and a 90.7-inch wheelbase, this model offers the control required for navigating farmyards and handling utility chores.
Production
| Description | Utility tractor / Built in Modena, Italy |
|---|---|
| Distributor | Hesston |
| Manufacturer | Fiat |
| Original price | $19,600 (1984) |
Engine
| Engine type | Fiat 3.5L 4-cyl diesel |
|---|---|
| Fuel tank | 19.2 gal (72.7 L) |
| Bore/Stroke | 3.94x4.33 inches (100 x 110 mm) |
| Description | Fiat 8045.02 / diesel / 4-cylinder / liquid-cooled |
| Displacement | 211 ci (3.5 L) |
| Starter volts | 12 |
| Drawbar (claimed) | 54.3 hp (40.5 kW) |
| Drawbar (tested) | 53.13 hp (39.6 kW) |
| PTO (claimed) | 62 hp (46.2 kW) |
| PTO (tested) | 62.40 hp (46.5 kW) |
Transmission
| Description | Four synchronized gears in three ranges. |
|---|---|
| Gears | 12 forward and 4 reverse / 12 forward and reverse / 20 forward and 8 reverse |
| Type | synchronized |
| Transmission type | 12-speed synchronized / 12-speed / 20-speed |
| Transmission type | 12-speed synchronized / 12-speed / 20-speed |
Mechanical
| Description | Differential mechanical wet disc brakes / Four-post ROPS standard. Optional canopy. |
|---|---|
| Drive | 4x2 2WD |
| Steering | hydrostatic power |
Hydraulics
| Pressure | 2700 psi (186.2 bar) |
|---|---|
| Pump flow | 11 gpm (41.6 lpm) |
| Type | open center |
| Valves | 1 or 2 |
Hitch
| Rear Type | I/II |
|---|
PTO
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 540 |
Electrical
| Charging amps | 33 |
|---|---|
| Charging system | alternator |
Dimensions & Tires
| Ground clearance | 23 inches (2WD front axle) (58 cm) |
|---|---|
| Length | 139 inches (2WD) (353 cm) |
| Operating weight | 5,689 lbs (2WD) (2580 kg) |
| Wheelbase | 90.7 inches (2WD) (230 cm) |
| Front tire | 7.50-16 |
| Rear tire | 14.9-30 |
| Weight | 5689 to 6350 pounds |
| Wheelbase | 90.7 inches (2WD) (230 cm) |
| Ag front | 7.50-16 (2WD) |
| Ag rear | 14.9-30 |
Hesston 666 Height
| Exhaust | 96 inches (2WD) (243 cm) |
|---|---|
| Hood | 59 inches (149 cm) |
Nebraska Tractor Test 1485
| Description | Diesel 12-speed 4WDJune 6 - 17, 1983Link: Nebraska Tractor Test 1485 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 3.9 gal/hour (14.8 l/hour) / 3.5 gal/hour (13.2 l/hour) / 3.9 gal/hour (14.8 l/hour) |
| Max power | 53.13 hp (39.6 kW) |
| Power at rated engine speed | 62.40 hp (46.5 kW) |
| Power at rated PTO speed | 60.33 hp (45.0 kW) |
Variants
| 666DT | 4WD |
|---|---|
| 666HC | high-crop |