Hesston 666
The Hesston 666 is a tractor produced by Hesston. It is equipped with a 211 ci 3.5 L engine. The listed engine power is 62.40 hp 46.5 kW. Transmission: 20 forward and 8 reverse. Drive type: 4x2 2WD. Operating weight: 5689 to 6350 pounds.
Engine Power
62.40 hp
46.5 kW
Drive & Traction
4x2 2WD
Fuel & Capacities
19.2 gal
72.7 L
Transmission
20 forward and 8 reverse
Operating Weight
5,689 lbs (2WD)
2580 kg
Overview
 | 1983 - 1984
Utility tractorFiat built
Utility tractor
Fiat built |
|---|
Production | |
|---|---|
Distributor | Hesston |
Manufacturer | Fiat |
Utility tractor | |
Built in Modena, Italy | |
Original price | $19,600 (1984) |
Variants | |
|---|---|
666DT | 4WD |
666HC | high-crop |
Hesston 666 Engine | |
|---|---|
Fiat 3.5L 4-cyl diesel | |
Fuel tank | 19.2 gal
72.7 L |
Engine details ...  | |
Hesston 666 Power | |
|---|---|
Drawbar (claimed) | 54.3 hp
40.5 kW |
PTO (claimed) | 62 hp
46.2 kW |
Drawbar (tested) | 53.13 hp
39.6 kW |
PTO (tested) | 62.40 hp
46.5 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Drive | 4x2 2WD |
4x4 MFWD 4WD (666DT) | |
Steering | hydrostatic power |
Differential mechanical wet disc brakes | |
Four-post ROPS standard. Optional canopy. | |
Hydraulics | |
|---|---|
Type | open center |
Pressure | 2700 psi
186.2 bar |
Valves | 1 or 2 |
Pump flow | 11 gpm
41.6 lpm |
Tractor hitch | |
|---|---|
Rear Type | I/II |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540 |
Dimensions & Tires | |
|---|---|
Wheelbase | 90.7 inches (2WD)
230 cm |
88.5 inches (4WD)
224 cm | |
Weight | 5689 to 6350 pounds |
Front tire | 7.50-16 |
Rear tire | 14.9-30 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Charging system | alternator |
Charging amps | 33 |
Engine
Engine Detail — 211 ci / 3.5 L Diesel
Manufacturer | Fiat 8045.02 |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 211 ci
3.5 L |
Bore/Stroke | 3.94x4.33 inches
100 x 110 mm |
Starter volts | 12 |
Transmission
Transmission options | |
|---|---|
12-speed synchronized | |
12-speed | |
20-speed |
Transmission — 12 forward and 4 reverse synchronized
Type | synchronized |
Gears | 12 forward and 4 reverse |
Four synchronized gears in three ranges. | |
Transmission — 12 forward and reverse
Gears | 12 forward and reverse |
Transmission — 20 forward and 8 reverse
Gears | 20 forward and 8 reverse |
Dimensions
Hesston 666 Tires | |
|---|---|
Ag front | 7.50-16 (2WD) |
9.5-24 (4WD) | |
Ag rear | 14.9-30 |
Dimensions | |
|---|---|
Wheelbase | 90.7 inches (2WD)
230 cm |
88.5 inches (4WD)
224 cm | |
Length | 139 inches (2WD)
353 cm |
143 inches (4WD)
363 cm | |
Operating weight | 5,689 lbs (2WD)
2580 kg |
6,350 lbs (4WD)
2880 kg | |
Ground clearance | 23 inches (2WD front axle)
58 cm |
19 inches (4WD front axle)
48 cm | |
16 inches (4WD front differential)
40 cm | |
Hesston 666 Height | |
|---|---|
Hood | 59 inches
149 cm |
Exhaust | 96 inches (2WD)
243 cm |
97 inches (4WD)
246 cm | |
Tests
Nebraska Tractor Test 1485 | |
|---|---|
Diesel 12-speed 4WD
June 6 - 17, 1983
Link: Nebraska Tractor Test 1485 file | |
PTO performance | |
Power at rated engine speed | 62.40 hp
46.5 kW |
Fuel use | 3.9 gal/hour
14.8 l/hour |
Power at rated PTO speed | 60.33 hp
45.0 kW |
Fuel use | 3.5 gal/hour
13.2 l/hour |
Drawbar performance | |
Max power | 53.13 hp
39.6 kW |
Fuel use | 3.9 gal/hour
14.8 l/hour |
Recommended Implements & Sizing Guide
Engineering recommendations for Hesston 666 based on its 62.4 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 | 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 666.
Estimated Continuous Field Runtime: 5.9 hrs
Approximately 5.9 hours of continuous field operation at ~75% rated power on a full tank (19.2 gal / 72.7 L).
Estimated 75% Load Fuel Burn~3.2 gal/hr (12.3 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 666 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Hesston 666.
Converted Equivalents:
Horsepower (HP)62.4 hp
Kilowatts (kW)46.5 kW
Metric Horsepower (PS / CV)63.3 PS
Direct Competitor Comparison
Compare Hesston 666 against same-era industry alternatives in the same horsepower class.
Current Model
Hesston
Hesston 666
Engine Power:62.40 hp
46.5 kW
★ Baseline Reference
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