Fiat-Hesston

Hesston 55-66

The Hesston 55-66 is a utility tractor produced from 1985 to 1989 as part of the 66 Series by Hesston, a part of Fiat. It features a Fiat 2.7L 3-cylinder liquid-cooled diesel engine producing 55 hp, with a fuel tank capacity of 19.2 gallons. Transmission options include 12-speed partially synchronized, 12-speed mechanical shuttle, and 20-speed creeper. The tractor offers two- or four-wheel drive, power steering, mechanical wet disc brakes, and a four-post ROPS with optional canopy. Hydraulics are open center type with up to 2700 psi pressure and up to 3 valves. The rear hitch is category I/II with position and lower-link draft control and a rear lift capacity of 3920 lbs. The PTO is independent with 540/ground speeds. Dimensions vary between 2WD and 4WD models, with wheelbases of 85.6 and 83.4 inches respectively, and weights ranging from 4851 to 5402 lbs shipping weight. Standard tires differ for 2WD and 4WD configurations. Electrical system includes a 12-volt battery and 33 amp alternator. The tractor can be equipped with an L330 front-end loader. Related model includes the Hesston 60-66.
Power55 hp
Founded1985 - 1989
Model55-66

Technical Specifications

Detailed specifications and technical data for Hesston 55-66

Power
Engine power55 hp (41.0 kW)
PTO (tested)45.78 hp (34.1 kW)
PTO (claimed)45.8 hp (34.2 kW)
Drawbar (tested)38.39 hp (28.6 kW)
Drawbar (claimed)38 hp (28.3 kW)
Engine
Typediesel
ModelFiat 8035.06
Power55 hp (41.0 kW)
Coolingliquid-cooled
Starterelectric
Cylinders3-cylinder
Fuel tank19.2 gal (72.7 L)
Rated RPM2500
Bore/Stroke3.937x4.528 inches (100 x 115 mm)
Displacement165 ci (2.7 L)
Starter volts12
Compression ratio17:1
Variants
55-66utility 2WD
55-66DTutility 4WD
Electrical
Battery volts12
Charging amps33
Charging systemalternator
Hydraulics
Typeopen center
Valves0 to 3
Pressure2700 psi (186.2 bar)
Total flow11 gpm (41.6 lpm)
Mechanical
ROPSFour-post ROPS. Canopy optional.
DriveTwo- or four-wheel drive
BrakesMechanical wet disc brakes
SteeringPower steering
Production
TypeUtility tractor
Series66 Series
Years made1985 - 1989
Original price$17,400 in 1990
Attachments
LoaderL330 Loader
Transmission
Creeper20 forward and 8 reverse gears; Four gears (1-4) in three ranges (I-III) with normal and creeper ranges.
Options12-speed partially synchronized, 12-speed mechanical shuttle, 20-speed creeper
Mechanical shuttle12 forward and reverse gears; Four gears (1-4) in three ranges (I-III) with shuttle.
Partially synchronized12 forward and 4 reverse gears; Four gears (1-4) in three ranges (I-III). Shifts between gears are synchronized.
Tractor hitch
Controlposition and lower-link draft control
Rear TypeI/II
Rear lift capacity3920 lbs (1778 kg)
Dimensions & Tires
Weight4851 to 5402 pounds
2WD Length130 inches (330 cm)
4WD Length133 inches (337 cm)
Rear tread52.1 to 75.75 inches (132 to 192 cm)
Hood height56.5 inches (143 cm)
2WD Wheelbase85.6 inches (217 cm)
4WD Wheelbase83.4 inches (211 cm)
2WD Front tread55.1 to 74.75 inches (139 to 189 cm)
2WD ROPS height92.5 inches (234 cm)
4WD Front tread56.9 to 73.75 inches (144 to 187 cm)
4WD ROPS height95 inches (241 cm)
Ballasted weight6570 lbs (2980 kg)
2WD Shipping weight4851 lbs (2200 kg)
4WD Shipping weight5402 lbs (2450 kg)
2WD Operating weight5290 lbs (2399 kg)
Steering wheel height63.5 inches (161 cm)
2WD Standard tires (ag)Front: 6.50-16. Rear: 13.6-28
4WD Standard tires (ag)Front: 9.5-24. Rear: 16.9-28
2WD Clearance (front axle)18.5 inches (46 cm)
4WD Clearance (front axle)14.5 inches (36 cm)
Power Take-off (PTO)
Rear PTOindependent
Rear PTO Type540/ground