Fiat-Hesston 666 tractor specifications

1983 - 1984

1983 - 1984 Utility tractorFiat built

Series:

Series:566 ← 666 → 766

1983 - 1984

Utility tractor

Fiat built

Series:

466 ←

566

→ 666

Production

Production
Distributor:	Hesston
Manufacturer:	Fiat
Type:	Utility tractor
Factory:	Modena, Italy
Original price:	$17,720 (1984)

Variants

Variants
566DT:	4WD

Hesston 566 Power

Hesston 566 Power
PTO (claimed):	51 hp 38.0 kW

Hesston 566 Engine

Hesston 566 Engine
Fiat 2.8L 3-cyl diesel
Fuel tank:	19.2 gal 72.7 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
	4x4 MFWD 4WD (566DT)
Steering:	hydrostatic power
Brakes:	mechanical wet disc
Cab:	Four-post ROPS standard. Optional canopy.
Transmissions:	12-speed synchronized
	12-speed
	20-speed
Transmission details ...

Hydraulics

Hydraulics
Type:	open center
Pressure:	2700 psi 186.2 bar
Valves:	1 or 2
Pump flow:	11 gpm 41.6 lpm

Tractor hitch

Tractor hitch
Rear Type:	I/II

Power Take-off (PTO)

Power Take-off (PTO)
Rear PTO:	independent
Rear RPM:	540

Dimensions & Tires

Dimensions & Tires
Wheelbase:	85.6 inches 217 cm (2WD)
	83.4 inches 211 cm (4WD)
Weight:	4901 to 5452 pounds
Front tire:	7.50-16
Rear tire:	14.9-28
Full dimensions and tires ...

Electrical

Electrical
Charging system:	alternator
Charging amps:	33

Production

Production Distributor:Hesston
Manufacturer:Fiat
Type:Utility tractor
Factory:Modena, Italy
Original price:$19,600 (1984)

Variants

Variants 666DT:4WD
666HC:high-crop

1983 - 1984

High-Clearance tractor

Fiat built

Series:

666DT High Crop

→ 766DT High Crop

Production

Production
Distributor:	Hesston
Manufacturer:	Fiat
Type:	High-Clearance tractor

Variants

Variants
766:	utility
766HC:	high-crop

Hesston 666DT High Crop Power

Hesston 666DT High Crop Power
PTO (claimed):	62 hp 46.2 kW

Hesston 666DT High Crop Engine

Hesston 666DT High Crop Engine
Fiat 3.5L 4-cyl diesel
Fuel tank:	19.2 gal 72.7 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x4 MFWD 4WD
Steering:	power
Brakes:	mechanical wet disc
Cab:	ROPS.
Transmission:	12-speed partially synchronized
Transmission details ...

Hydraulics

Hydraulics
Type:	open center
Pressure:	2700 psi 186.2 bar
Valves:	1
Pump flow:	11 gpm 41.6 lpm

Tractor hitch

Tractor hitch
Rear Type:	II
Control:	position and draft control

Power Take-off (PTO)

Power Take-off (PTO)
Rear PTO:	independent
Rear RPM:	540 (1.375)

Dimensions & Tires

Dimensions & Tires
Weight:	7298 lbs 3310 kg
Front tire:	13.6x38
Rear tire:	13.6x38
Full dimensions and tires ...

Electrical

Electrical
Ground:	negative
Charging system:	alternator
Charging amps:	33
Battery volts:	12

Hesston 666 Power

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
power test details ...

1983 - 1984

Utility tractor

Fiat built

Series:

566 ←

666

→ 766

Nebraska Tractor Test 1485

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

Hesston 666 Engine

Hesston 666 Engine Fiat 3.5L 4-cyl diesel Fuel tank:19.2 gal
72.7 L
Engine details ...

1983 - 1984

Utility tractor

Fiat built

Series:

566 ←

666

→ 766

Engine Detail

Engine Detail
Fiat 8045.02
diesel
4-cylinder
liquid-cooled
Displacement:	211 ci 3.5 L
Bore/Stroke:	3.94x4.33 inches 100 x 110 mm
Starter volts:	12

Mechanical

Mechanical Chassis:4x2 2WD
4x4 MFWD 4WD (666DT)
Steering:hydrostatic power
Brakes:differential mechanical wet disc
Cab:Four-post ROPS standard. Optional canopy.
Transmissions:12-speed synchronized
12-speed
20-speed
Transmission details ...

1983 - 1984

Utility tractor

Fiat built

Series:

566 ←

666

→ 766

Transmissions overview

Transmissions overview
12-speed synchronized
12-speed
20-speed

Transmission

Transmission
Type:	synchronized
Gears:	12 forward and 4 reverse
Four synchronized gears in three ranges.

Transmission

Transmission
Gears:	12 forward and reverse

Transmission

Transmission
Gears:	20 forward and 8 reverse

Hydraulics

Hydraulics Type:open center
Pressure:2700 psi
186.2 bar
Valves:1 or 2
Pump flow:11 gpm
41.6 lpm

Tractor hitch

Tractor hitch Rear Type:I/II

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:independent
Rear RPM:540

Dimensions & Tires

Dimensions & Tires Wheelbase:90.7 inches
230 cm (2WD)
88.5 inches
224 cm (4WD)
Weight:5689 to 6350 pounds
Front tire:7.50-16
Rear tire:14.9-30
Full dimensions and tires ...

1983 - 1984

Utility tractor

Fiat built

Series:

566 ←

666

→ 766

Hesston 666 Tires

Hesston 666 Tires
Ag front:	7.50-16 (2WD)
	9.5-24 (4WD)
Ag rear:	14.9-30

Dimensions

Dimensions
Wheelbase:	90.7 inches 230 cm (2WD)
	88.5 inches 224 cm (4WD)
Length:	139 inches 353 cm (2WD)
	143 inches 363 cm (4WD)
Operating weight:	5,689 lbs 2580 kg (2WD)
	6,350 lbs 2880 kg (4WD)
Ground clearance:	23 inches 58 cm (2WD front axle)
	19 inches 48 cm (4WD front axle)
	16 inches 40 cm (4WD front differential)