Overview
The Hesston 780 is a utility farm tractor manufactured by Fiat between 1981 and 1984, offered in both 2WD and 4WD variants. It is powered by a 3.7L four-cylinder diesel engine that produced a tested PTO output of 70.57 hp and a maximum drawbar power of 62.88 hp. The machine features an open center hydraulic system with an 11 gpm pump flow and was originally priced at $23,500 in 1984.
Ideal Applications
Tested Engine and PTO Performance:
According to Nebraska Tractor Test 1386, the Fiat 3.7L diesel engine delivered 70.57 hp at the rated engine speed and 66.67 hp at the rated PTO speed while consuming 4.4 gallons of fuel per hour.
Transmission and Drive Configuration:
The model was listed with multiple transmission options including an 8-speed partially synchronized version, a 16-speed variant, and an 8-speed mechanical shuttle to support its two- or four-wheel drive types.
Hydraulic and Hitch Specifications:
The tractor is equipped with a Category II rear hitch and an open center hydraulic system that operates at 2702 psi with two valves and a 11 gpm pump flow.
Production
| Description | Utility tractor / Original price was $23,500 in 1984 |
|---|---|
| Manufacturer | Hesston (a part of Fiat) |
Engine
| Engine type | Fiat 3.7L 4-cyl diesel |
|---|---|
| Fuel tank | 21.1 gal (79.9 L) |
| Bore/Stroke | 4.03x4.33 inches (102 x 110 mm) |
| Compression | 17:1 |
| Description | Fiat 8045 / diesel / 4-cylinder / liquid-cooled |
| Displacement | 224 ci (3.7 L) |
| Rated RPM | 2500 |
| Starter | electric |
| Starter volts | 12 |
| Drawbar (tested) | 62.88 hp (46.9 kW) |
| PTO (claimed) | 70 hp (52.2 kW) |
| PTO (tested) | 70.57 hp (52.6 kW) |
Transmission
| Description | Four gears with high and low ranges provide eight forward speeds. Gears 3/4 are synchronized in both ranges. / Four gears with four ranges provides sixteen forward speeds. |
|---|---|
| Gears | 8 forward and 2 reverse / 16 forward and 4 reverse / 8 forward and reverse |
| Type | partially synchronized / mechanical shuttle |
| Transmission type | 8-speed partially synchronized / 16-speed / 8-speed mechanical shuttle |
| Transmission type | 8-speed partially synchronized / 16-speed / 8-speed mechanical shuttle |
Mechanical
| Description | Power steering / Differential hydraulic wet disc brakes / ROPS standard, Supercomfort cab optional with air conditioning. Optional radio, cassette, and CB radio. |
|---|---|
| Drive type | Two- or four-wheel drive |
Hydraulics
| Pressure | 2702 psi (186.3 bar) |
|---|---|
| Pump flow | 11 gpm (41.6 lpm) |
| Type | open center |
| Valves | 2 |
Hitch
| Rear Type | II |
|---|
PTO
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 540 |
Electrical
| Battery volts | 12 |
|---|---|
| Charging amps | 45 |
| Charging system | alternator |
Dimensions & Tires
| 2WD Length | 135 inches (342 cm) |
|---|---|
| 4WD Length | 144 inches (365 cm) |
| Wheelbase | 89 inches (226 cm) |
| Front tire | 7.50-16 |
| Rear tire | 18.4-30 |
| Weight | 5495 to 6200 pounds |
| Wheelbase | 89 inches (226 cm) |
| Ag front | 7.50-16 (2WD) |
| Ag rear | 18.4-30 |
Hesston 780 Height
| 2WD Hood | 59.5 inches (151 cm) |
|---|---|
| 4WD Hood | 60 inches (152 cm) |
| Cab | 103.5 inches (262 cm) |
| ROPS | 102.5 inches (260 cm) |
Hesston 780 Weight
| 2WD Operating | 5495 lbs (2492 kg) |
|---|---|
| 4WD Operating | 6200 lbs (2812 kg) |
| Ballasted | 10100 lbs (4581 kg) |
Hesston 780 attachments
| Description | front-end loader |
|---|
Nebraska Tractor Test 1294
| Description | Diesel 16-speed 2WDOctober 19 - November 1, 1978Link: Nebraska Tractor Test 1294 file / PTO performance / Drawbar performance / Gear 4N used for power test. |
|---|---|
| Fuel use | 4.7 gal/hour (17.8 l/hour) / 4.3 gal/hour (16.3 l/hour) / 4.5 gal/hour (17.0 l/hour) |
| Max power | 62.88 hp (46.9 kW) |
| Power at rated engine speed | 70.36 hp (52.5 kW) |
| Power at rated PTO speed | 66.30 hp (49.4 kW) |
Nebraska Tractor Test 1386
| Description | Diesel 8-speed 4WDApril 21 - 29, 1981Link: Nebraska Tractor Test 1386 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 4.4 gal/hour (16.7 l/hour) / 4.0 gal/hour (15.1 l/hour) / 4.4 gal/hour (16.7 l/hour) |
| Max power | 59.97 hp (44.7 kW) |
| Power at rated engine speed | 70.57 hp (52.6 kW) |
| Power at rated PTO speed | 66.67 hp (49.7 kW) |
References
| Description | 80 Series Tractors - 50-90 PTO HP published in 1981, by Hesston |
|---|
Speeds
| Description | With 18.4-30 rear tires. / With 18.4-30 rear tires. / With 18.4-30 rear tires. |
|---|
Tractor Tests
| Description | NTTL 1294: diesel 16-speed 2WD / NTTL 1386: diesel 8-speed 4WD |
|---|
Variants
| 780 | 2WD |
|---|---|
| 780DT | 4WD |