Tractor · 1983Unverified
Hesston 666
Hesston 666 — Utility tractor · 62 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
62 hp
Max power
39.6 kW
Weight
5689 to 6350 pounds
Hover a source tag to verify
Overview
DistributorHesstonReference
ManufacturerFiatReference
Utility tractorReference
Built in Modena, ItalyReference
Original price$19,600 (1984)Reference
Two- or four-wheel driveReference
Steeringhydrostatic powerReference
Differential mechanical wet disc brakesReference
Four-post ROPS standard. Optional canopy.Reference
Variants
666DT4WDReference
666HChigh-cropReference
666similar Fiat modelReference
Engine
Fiat 3.5L 4-cyl dieselReference
Fuel tank72.7 LReference
Drawbar (claimed)40.5 kWReference
Drawbar (tested)39.6 kWReference
Fiat 8045.02Reference
dieselReference
4-cylinderReference
liquid-cooledReference
Displacement3.5 LReference
Bore/Stroke100 x 110 mmReference
Starter volts12Reference
Power at rated engine speed46.5 kWReference
Max power39.6 kWReference
Transmission
12-speed synchronizedReference
12-speed mechanical shuttleReference
20-speed creeperReference
TypesynchronizedReference
Gears12 forward and 4 reverseReference
Four synchronized gears in three ranges.Reference
Typemechanical shuttleReference
Gears12 forward and reverseReference
TypecreeperReference
Gears20 forward and 8 reverseReference
PTO & Hydraulics
PTO (claimed)46.2 kWReference
PTO (tested)46.5 kWReference
Typeopen centerReference
Pressure186.2 barReference
Valves1 or 2Reference
Pump flow41.6 lpmReference
Rear TypeI/IIReference
Rear PTOindependentReference
Rear PTO Type540Reference
Power at rated PTO speed45.0 kWReference
Dimensions
Wheelbase230 cmReference
Wheelbase224 cmReference
Weight5689 to 6350 poundsReference
Front tire7.50-16Reference
Rear tire14.9-30Reference
Ag front7.50-16 (2WD)Reference
Ag front9.5-24 (4WD)Reference
Ag rear14.9-30Reference
Length353 cmReference
Length363 cmReference
Operating weight2580 kgReference
Operating weight2880 kgReference
Ground clearance58 cmReference
Ground clearance48 cmReference
Ground clearance40 cmReference
Electrical
Charging systemalternatorReference
Charging amps33Reference
Hesston 666 Height
Hood149 cmReference
Exhaust243 cmReference
Exhaust246 cmReference
Test results
Diesel 12-speed 4WDJune 6 - 17, 1983Link: Nebraska Tractor Test 1485 fileReference
PTO performanceReference
Fuel use14.8 l/hourReference
Fuel use13.2 l/hourReference
Drawbar performanceReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.