Hesston 70-90
The Hesston 70-90 is a tractor produced by Hesston. It is equipped with a 220.5 ci 3.6 L engine. The listed engine power is Diesel (listed): 70 hp / 52.2 kW. Transmission: 20 forward and 8 reverse. Operating weight: 6798 to 7436 pounds.
Engine Power
Diesel (listed): 70 hp / 52.2 kW
Fuel & Capacities
21.1 gal
79.9 L
Transmission
20 forward and 8 reverse
Operating Weight
6798 to 7436 pounds
Overview
 | 1985
90 SeriesUtility tractorFiat built
90 Series
Utility tractor
Fiat built |
|---|
Production | |
|---|---|
Distributor | Hesston |
Manufacturer | Fiat |
Utility tractor | |
Original price was $31,100 in 1985 | |
Variants | |
|---|---|
70-90DT | 4WD |
Hesston 70-90 Engine | |
|---|---|
Fiat 3.6L 4-cyl diesel | |
Fuel tank | 21.1 gal
79.9 L |
Engine details ...  | |
Hesston 70-90 Power | |
|---|---|
Engine | 70 hp
52.2 kW |
PTO (claimed) | 62 hp
46.2 kW |
Drawbar (tested) | 53.92 hp
40.2 kW |
PTO (tested) | 62.25 hp
46.4 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two- or four-wheel drive | |
Final drives | planetary |
Differential lock | mechanical rear |
Power steering | |
Differential hydraulic wet disc brakes | |
Four-post ROPS. Cab optional. | |
Hydraulics | |
|---|---|
Type | open center |
Pressure | 2702 psi
186.3 bar |
Rear valves | 2 or 3 |
Pump flow | 11 gpm
41.6 lpm |
Tractor hitch | |
|---|---|
Rear Type | II |
Rear lift | 5212 lbs
2364 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540 (1.375) |
Engine RPM | 540@2198 |
Dimensions & Tires | |
|---|---|
2WD Wheelbase | 89.25 inches
226 cm |
4WD Wheelbase | 89.5 inches
227 cm |
Weight | 6798 to 7436 pounds |
Front tire | 7.50-16 |
Rear tire | 16.9-30 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 65 |
Battery volts | 12 |
References | |
|---|---|
 | |
90 Series Tractors published in 1984, by Hesston |
Engine
Engine Detail — 220.5 ci / 3.6 L Diesel
Manufacturer | Fiat 8045.06 |
Fuel Type | Diesel |
Configuration | 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 |
Fuel system | direct injection |
Pre-heating | ether injection |
Compression | 17:1 |
Rated RPM | 2500 |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission options | |
|---|---|
12-speed synchromesh | |
12-speed mechanical shuttle | |
20-speed creeper |
Transmission — 12 forward and 4 reverse synchromesh
Type | synchromesh |
Gears | 12 forward and 4 reverse |
Clutch | 279.4mm dry disc |
Four gears (1-4) in three ranges (I-III) plus reverse range. | |
 | |
Transmission — 12 forward and reverse mechanical shuttle
Type | mechanical shuttle |
Gears | 12 forward and reverse |
With 18.4-30 rear tires. | |
 | |
Transmission | |
Type | creeper |
Gears | 20 forward and 8 reverse |
 | |
Dimensions
Hesston 70-90 Tires | |
|---|---|
2WD Ag front | 7.50-16 |
4WD Ag front | 11.2-24 |
Ag rear | 16.9-30 |
2WD Ag front | 7.50-18 |
2WD Ag front | 9.5L-15 |
4WD Ag front | 13.6-24 |
4WD Ag front | 12.4-24 |
Ag rear | 18.4-30 |
13.6-38 | |
16.9-30 | |
Dimensions | |
|---|---|
2WD Wheelbase | 89.25 inches
226 cm |
4WD Wheelbase | 89.5 inches
227 cm |
2WD Length | 135.25 inches
343 cm |
4WD Length | 140.5 inches
356 cm |
2WD Front tread | 55.5 to 75.25 inches
140 to 191 cm |
4WD Front tread | 64.1 to 77 inches
162 to 195 cm |
Rear tread | 55.1 to 78.75 inches
139 to 200 cm |
Hesston 70-90 Weight | |
|---|---|
2WD | 6798 lbs
3083 kg |
4WD | 7436 lbs
3372 kg |
Operating | 7,100 lbs (2WD)
3220 kg |
Ballasted | 7,775 lbs
3526 kg |
Hesston 70-90 Height | |
|---|---|
2WD Hood | 58.25 inches
147 cm |
4WD Hood | 64.5 inches
163 cm |
ROPS | 101.25 inches
257 cm |
Cab | 99.5 inches
252 cm |
Tests
Nebraska Tractor Test 1562 | |
|---|---|
Diesel 12-speed 2WD
April 22 - May 9, 1985
Link: Nebraska Tractor Test 1562 file | |
PTO performance | |
Power at rated engine speed | 62.25 hp
46.4 kW |
Fuel use | 3.9 gal/hour
14.8 l/hour |
Power at rated PTO speed | 61.94 hp
46.2 kW |
Fuel use | 3.7 gal/hour
14.0 l/hour |
Drawbar performance | |
Max power | 53.92 hp
40.2 kW |
Fuel use | 3.8 gal/hour
14.4 l/hour |
Max pull | 6238 lbs
2829 kg |
Recommended Implements & Sizing Guide
Engineering recommendations for Hesston 70-90 based on its 70 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 | 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 | 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 70-90.
Estimated Continuous Field Runtime: 5.8 hrs
Approximately 5.8 hours of continuous field operation at ~75% rated power on a full tank (21.1 gal / 79.9 L).
Estimated 75% Load Fuel Burn~3.6 gal/hr (13.8 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 70-90 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Hesston 70-90.
Converted Equivalents:
Horsepower (HP)70 hp
Kilowatts (kW)52.2 kW
Metric Horsepower (PS / CV)71 PS
Direct Competitor Comparison
Compare Hesston 70-90 against same-era industry alternatives in the same horsepower class.
Current Model
Hesston
Hesston 70-90
Engine Power:Diesel (listed): 70 hp / 52.2 kW
★ Baseline Reference
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