Hesston 55-66
The Hesston 55-66 is a tractor produced by Hesston. It is equipped with a 165 ci 2.7 L engine. The listed engine power is Diesel (listed): 55 hp / 41.0 kW. Transmission: 20 forward and 8 reverse. Operating weight: 4851 to 5402 pounds.
Engine Power
Diesel (listed): 55 hp / 41.0 kW
Fuel & Capacities
19.2 gal
72.7 L
Transmission
20 forward and 8 reverse
Operating Weight
4851 to 5402 pounds
Overview
 | 1985 - 1989
66 SeriesUtility tractor
66 Series
Utility tractor |
|---|
Production | |
|---|---|
Manufacturer | Hesston (a part of Fiat) |
Utility tractor | |
Original price was $17,400 in 1990 | |
Variants | |
|---|---|
55-66 | utility 2WD |
55-66DT | utility 4WD |
Hesston 55-66 Engine | |
|---|---|
Fiat 2.7L 3-cyl diesel | |
Fuel tank | 19.2 gal
72.7 L |
Engine details ...  | |
Hesston 55-66 Power | |
|---|---|
Engine | 55 hp
41.0 kW |
Drawbar (claimed) | 38 hp
28.3 kW |
PTO (claimed) | 45.8 hp
34.2 kW |
Drawbar (tested) | 38.39 hp
28.6 kW |
PTO (tested) | 45.78 hp
34.1 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two- or four-wheel drive | |
Power steering | |
Mechanical wet disc brakes | |
Four-post ROPS. Canopy optional. |
Hydraulics | |
|---|---|
Type | open center |
Pressure | 2700 psi
186.2 bar |
Valves | 0 to 3 |
Total flow | 11 gpm
41.6 lpm |
Tractor hitch | |
|---|---|
Rear Type | I/II |
Control | position and lower-link draft control |
Rear lift | 3920 lbs
1778 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540/ground |
Dimensions & Tires | |
|---|---|
2WD Wheelbase | 85.6 inches
217 cm |
4WD Wheelbase | 83.4 inches
211 cm |
Weight | 4851 to 5402 pounds |
Front tire | 6.50-16 |
2WD Rear tire | 13.6-28 |
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 — 165 ci / 2.7 L Diesel
Manufacturer | Fiat 8035.06 |
Fuel Type | Diesel |
Configuration | 3-cylinder, liquid-cooled |
Displacement | 165 ci
2.7 L |
Bore/Stroke | 3.937x4.528 inches
100 x 115 mm |
Power | 55 hp
41.0 kW |
Compression | 17:1 |
Rated RPM | 2500 |
Starter | electric |
Starter volts | 12 |
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 16.9-28 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 16.9-28 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. | |
 | |
Dimensions
Hesston 55-66 Tires | |
|---|---|
2WD Standard tires (ag) | Front: 6.50-16. Rear: 13.6-28 |
4WD Standard tires (ag) | Front: 9.5-24. Rear: 16.9-28 |
Dimensions | |
|---|---|
2WD Wheelbase | 85.6 inches
217 cm |
4WD Wheelbase | 83.4 inches
211 cm |
2WD Length | 130 inches
330 cm |
4WD Length | 133 inches
337 cm |
2WD Clearance (front axle) | 18.5 inches
46 cm |
4WD Clearance (front axle) | 14.5 inches
36 cm |
2WD Front tread | 55.1 to 74.75 inches
139 to 189 cm |
4WD Front tread | 56.9 to 73.75 inches
144 to 187 cm |
Rear tread | 52.1 to 75.75 inches
132 to 192 cm |
Hesston 55-66 Weight | |
|---|---|
2WD Shipping | 4851 lbs
2200 kg |
4WD Shipping | 5402 lbs
2450 kg |
2WD Operating | 5290 lbs
2399 kg |
Ballasted | 6570 lbs
2980 kg |
Hesston 55-66 Height | |
|---|---|
Steering wheel | 63.5 inches
161 cm |
Hood | 56.5 inches
143 cm |
2WD ROPS | 92.5 inches
234 cm |
4WD ROPS | 95 inches
241 cm |
Tests
Nebraska Tractor Test 1560 | |
|---|---|
Diesel 12-speed 2WD
April 15 - 29, 1985
Link: Nebraska Tractor Test 1560 file | |
PTO performance | |
Power at rated engine speed | 45.78 hp
34.1 kW |
Fuel use | 3.0 gal/hour
11.4 l/hour |
Power at rated PTO speed | 44.84 hp
33.4 kW |
Fuel use | 2.7 gal/hour
10.2 l/hour |
Drawbar performance | |
Max power | 38.39 hp
28.6 kW |
Fuel use | 3.0 gal/hour
11.4 l/hour |
Recommended Implements & Sizing Guide
Engineering recommendations for Hesston 55-66 based on its 55 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 | 6 ft (72 in)1.8 m | Medium Duty | Medium pasture clearing; rear slip-clutch recommended. |
Rotary TillerSeedbed Prep | 66 to 72 in165 - 180 cm | Medium Duty | Standard utility tiller; slip clutch protection required. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | Small Square Baler (14x18")小方捆打捆机 (36x46 cm) | Medium Duty | Classic 2-string baler for horse and small livestock hay. |
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 55-66.
Estimated Continuous Field Runtime: 6.7 hrs
Approximately 6.7 hours of continuous field operation at ~75% rated power on a full tank (19.2 gal / 72.7 L).
Estimated 75% Load Fuel Burn~2.9 gal/hr (10.8 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 55-66 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Hesston 55-66.
Converted Equivalents:
Horsepower (HP)55 hp
Kilowatts (kW)41 kW
Metric Horsepower (PS / CV)55.8 PS
Direct Competitor Comparison
Compare Hesston 55-66 against same-era industry alternatives in the same horsepower class.
Current Model
Hesston
Hesston 55-66
Engine Power:Diesel (listed): 55 hp / 41.0 kW
★ Baseline Reference
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