Hesston 80-66
The Hesston 80-66 is a tractor produced by Hesston. It is equipped with a 238.5 ci 3.9 L engine. The listed engine power is Diesel (listed): 80 hp / 59.7 kW. Transmission: 20 forward and 8 reverse. Operating weight: 5800 to 6535 pounds.
Engine Power
Diesel (listed): 80 hp / 59.7 kW
Fuel & Capacities
19.2 gal
72.7 L
Transmission
20 forward and 8 reverse
Operating Weight
5800 to 6535 pounds
Overview
 | 1985 - 1991
66 SeriesUtility tractorFiat built
66 Series
Utility tractor
Fiat built |
|---|
Production | |
|---|---|
Distributor | Hesston |
Manufacturer | Fiat |
Utility tractor | |
Original price was $26,500 in 1990 | |
Variants | |
|---|---|
80-66 | utility 2WD |
80-66DT | utility 4WD |
80-66OR | orchard 2WD |
80-66ORDT | orchard 4WD |
80-66HC | high-crop |
80-66HCDT | high-crop 4WD |
Hesston 80-66 Engine | |
|---|---|
Fiat 3.9L 4-cyl diesel | |
Fuel tank | 19.2 gal
72.7 L |
Engine details ...  | |
Hesston 80-66 Power | |
|---|---|
Engine | 80 hp
59.7 kW |
Drawbar (claimed) | 62 hp
46.2 kW |
PTO (claimed) | 70 hp
52.2 kW |
Drawbar (tested) | 62.21 hp
46.4 kW |
PTO (tested) | 70.43 hp
52.5 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two- or four-wheel drive | |
Power steering | |
Differential mechanical wet disc brakes | |
Four-post ROPS. Canopy optional. |
Hydraulics | |
|---|---|
Type | open center |
Pressure | 2700 psi
186.2 bar |
Valves | 1 to 3 |
Total flow | 11 gpm
41.6 lpm |
Tractor hitch | |
|---|---|
Rear Type | II |
Control | position and lower-link draft control |
Rear lift | 5194 lbs
2355 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540/ground |
540/1000 OptOptional | |
Dimensions & Tires | |
|---|---|
2WD Wheelbase | 90.7 inches
230 cm |
4WD Wheelbase | 88.5 inches
224 cm |
Weight | 5800 to 6535 pounds |
Front tire | 7.50-16 |
2WD Rear tire | 18.4-30 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Charging system | alternator |
Charging amps | 33 |
Battery volts | 12 |
References | |
|---|---|
 | |
66 Series Tractors 45 to 70 PTO HP published in 1985, by Hesston | |
66 Series Tractors Models 55-66, 60-66, 70-66, 80-66 - 45 to 70 PTO HP published in 1985, by Hesston |
Engine
Engine Detail — 238.5 ci / 3.9 L Diesel
Manufacturer | Fiat 8045.05 |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 238.5 ci
3.9 L |
Bore/Stroke | 4.094x4.527 inches
104 x 115 mm |
Power | 80 hp
59.7 kW |
Pre-heating | ether |
Compression | 17:1 |
Rated RPM | 2500 |
Starter | electric |
Starter volts | 12 |
Hesston 80-66 Engine | |
|---|---|
 |
Transmission
Transmission options | |
|---|---|
12-speed partially synchronized | |
12-speed mechanical shuttle | |
20-speed creeper |
Transmission — 12 forward and 4 reverse partially synchronized
Type | partially synchronized |
Gears | 12 forward and 4 reverse |
Four gears (1-4) in three ranges (I-III). Shifts between gears are synchronized. | |
With 18.4-30 rear tires. | |
 | |
Transmission — 12 forward and reverse mechanical shuttle
Type | mechanical shuttle |
Gears | 12 forward and reverse |
Four gears (1-4) in three ranges (I-III) with shuttle. | |
With 18.4-30 rear tires. | |
 | |
Transmission — 20 forward and 8 reverse creeper
Type | creeper |
Gears | 20 forward and 8 reverse |
Four gears (1-4) in three ranges (I-III) with normal and creeper ranges. | |
With 18.4-30 rear tires. | |
 | |
Dimensions
Hesston 80-66 Tires | |
|---|---|
2WD Standard tires (ag) | Front: 7.50-16. Rear: 18.4-30 |
4WD Standard tires (ag) | Front: 12.4-24. Rear: 18.4-30 |
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) | 21.5 inches
54 cm |
4WD Clearance (front axle) | 16 inches
40 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 80-66 Weight | |
|---|---|
2WD Shipping | 5800 lbs
2630 kg |
4WD Shipping | 6450 lbs
2925 kg |
4WD Operating | 6535 lbs
2964 kg |
Ballasted | 9400 lbs
4263 kg |
Hesston 80-66 Height | |
|---|---|
Steering wheel | 67 inches
170 cm |
Hood | 59 inches
149 cm |
ROPS | 100 inches
254 cm |
Tests
Nebraska Tractor Test 1534 | |
|---|---|
Diesel 12-speed 4WD
October 1 - 11, 1984
Link: Nebraska Tractor Test 1534 file | |
PTO performance | |
Power at rated engine speed | 70.43 hp
52.5 kW |
Fuel use | 4.1 gal/hour
15.5 l/hour |
Power at rated PTO speed | 68.91 hp
51.4 kW |
Fuel use | 4.0 gal/hour
15.1 l/hour |
Drawbar performance | |
Max power | 62.21 hp
46.4 kW |
Fuel use | 4.2 gal/hour
15.9 l/hour |
Max pull | 7245 lbs
3286 kg |
Recommended Implements & Sizing Guide
Engineering recommendations for Hesston 80-66 based on its 80 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 3 to 4 Bottom (16")3 - 4 铧 (40 cm) | Heavy Duty | Suitable for medium loam and stubble turnover. |
Rotary Cutter / MowerMowing & Clearing | 7 to 8 ft (84-96 in)2.1 - 2.4 m | Heavy Duty | Heavy-duty twin spindle cutter for overgrown acreage. |
Rotary TillerSeedbed Prep | 78 to 84 in200 - 215 cm | Heavy Duty | Heavy commercial tiller with multi-speed gearbox. |
Disc HarrowSecondary Tillage | 10 to 14 ft Tandem / Offset3.0 - 4.2 m 重型交错耙 | Heavy Duty | Aggressive residue cutting in corn/cotton stubble. |
Hay BalerHay & Forage | 4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机 | Heavy Duty | Silage and dry hay; 540 RPM PTO with slip-clutch. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Hesston 80-66.
Estimated Continuous Field Runtime: 4.6 hrs
Approximately 4.6 hours of continuous field operation at ~75% rated power on a full tank (19.2 gal / 72.7 L).
Estimated 75% Load Fuel Burn~4.2 gal/hr (15.7 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Hesston 80-66 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Hesston 80-66.
Converted Equivalents:
Horsepower (HP)80 hp
Kilowatts (kW)59.7 kW
Metric Horsepower (PS / CV)81.1 PS
Direct Competitor Comparison
Compare Hesston 80-66 against same-era industry alternatives in the same horsepower class.
Current Model
Hesston
Hesston 80-66
Engine Power:Diesel (listed): 80 hp / 59.7 kW
★ Baseline Reference
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