Fiat-Hesston 80-66 tractor specifications

1985 - 1991

1985 - 1991 66 SeriesUtility tractorFiat built

Series:

Series:70-66 ← 80-66

1985 - 1991

66 Series

Utility tractor

Fiat built

Series:

60-66 ←

70-66

→ 80-66

Production

Production
Distributor:	Hesston
Manufacturer:	Fiat
Type:	Utility tractor
Original price:	$23,400 (1990 )

Variants

Variants
70-66:	utility 2WD[6073]
70-66DT:	utility 4WD[6073]
70-66ORDT:	orchard 4WD
70-66HC:	high-crop
70-66HCDT:	high-crop 4WD

Hesston 70-66 Power

Hesston 70-66 Power
Engine:	70 hp 52.2 kW
Drawbar (claimed):	54 hp 40.3 kW
PTO (claimed):	62.7 hp 46.8 kW
Drawbar (tested):	54.22 hp 40.4 kW
PTO (tested):	62.72 hp 46.8 kW
power test details ...

Hesston 70-66 Engine

Hesston 70-66 Engine
Fiat 3.6L 4-cyl diesel
Fuel tank:	19.2 gal 72.7 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
	4x4 MFWD 4WD
Steering:	power
Brakes:	mechanical wet disc
Cab:	Four-post ROPS. Canopy optional.
Transmissions:	12-speed partially synchronized
	12-speed mechanical shuttle
	20-speed creeper
Transmission details ...

Hydraulics

Hydraulics
Type:	open center
Valves:	1 to 3
Total flow:	11 gpm 41.6 lpm

Tractor hitch

Tractor hitch
Rear Type:	I/II
Control:	position and lower-link draft control
Rear lift:	5194 lbs 2355 kg

Power Take-off (PTO)

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

Dimensions & Tires

Dimensions & Tires
2WD Wheelbase:	90.7 inches 230 cm
4WD Wheelbase:	88.5 inches 224 cm
Weight:	5689 to 6510 pounds
Front tire:	7.50-16
2WD Rear tire:	14.9-30
Full dimensions and tires ...

Hesston 70-66 attachments

Hesston 70-66 attachments
front-end loader
Attachment details ...

Electrical

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

Production

Production Distributor:Hesston
Manufacturer:Fiat
Type:Utility tractor
Original price:$26,500 (1990 )

Variants

Variants 80-66:utility 2WD
80-66DT:utility 4WD
80-66OR:orchard 2WD
80-66ORDT:orchard 4WD
80-66HC:high-crop
80-66HCDT:high-crop 4WD

1985 - 1991

66 Series

Utility tractor

Fiat built

Series:

70-66 ←

80-66

Production

Production
Distributor:	Hesston
Manufacturer:	Fiat
Type:	Utility tractor
Original price:	$26,500 (1990 )

Variants

Variants
80-66:	utility 2WD
80-66DT:	utility 4WD
80-66OR:	orchard 2WD
80-66ORDT:	orchard 4WD
80-66HC:	high-crop
80-66HCDT:	high-crop 4WD

Hesston 80-66 Power

Hesston 80-66 Power
Engine:	80 hp 59.7 kW
Drawbar (claimed):	62 hp 46.2 kW
PTO (claimed):	70 hp 52.2 kW
Drawbar (tested):	62.21 hp 46.4 kW
PTO (tested):	70.43 hp 52.5 kW
power test details ...

Hesston 80-66 Engine

Hesston 80-66 Engine
Fiat 3.9L 4-cyl diesel
Fuel tank:	19.2 gal 72.7 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
	4x4 MFWD 4WD
Steering:	power
Brakes:	differential mechanical wet disc
Cab:	Four-post ROPS. Canopy optional.
Transmissions:	12-speed partially synchronized
	12-speed mechanical shuttle
	20-speed creeper
Transmission details ...

Hydraulics

Hydraulics
Type:	open center
Pressure:	2700 psi 186.2 bar
Valves:	1 to 3
Total flow:	11 gpm 41.6 lpm

Tractor hitch

Tractor hitch
Rear Type:	II
Control:	position and lower-link draft control
Rear lift:	5194 lbs 2355 kg

Power Take-off (PTO)

Power Take-off (PTO)
Rear PTO:	independent
Rear RPM:	540/ground
	540/1000*Optional

Dimensions & Tires

Dimensions & Tires
2WD Wheelbase:	90.7 inches 230 cm
4WD Wheelbase:	88.5 inches 224 cm
Weight:	5800 to 6535 pounds
Front tire:	7.50-16
2WD Rear tire:	18.4-30
Full dimensions and tires ...

Hesston 80-66 attachments

Hesston 80-66 attachments
front-end loader
Attachment details ...

Electrical

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

Hesston 80-66 Power

Hesston 80-66 Power Engine:80 hp
59.7 kW
Drawbar (claimed):62 hp
46.2 kW
PTO (claimed):70 hp
52.2 kW
Drawbar (tested):62.21 hp
46.4 kW
PTO (tested):70.43 hp
52.5 kW
power test details ...

1985 - 1991

66 Series

Utility tractor

Fiat built

Series:

70-66 ←

80-66

Nebraska Tractor Test 1534

Nebraska Tractor Test 1534
Diesel 12-speed 4WD October 1 - 11, 1984 Link: Nebraska Tractor Test 1534 file
PTO performance
Power at rated engine speed:	70.43 hp 52.5 kW
Fuel use:	4.1 gal/hour 15.5 l/hour
Power at rated PTO speed:	68.91 hp 51.4 kW
Fuel use:	4.0 gal/hour 15.1 l/hour
Drawbar performance
Max power:	62.21 hp 46.4 kW
Fuel use:	4.2 gal/hour 15.9 l/hour
Max pull:	7245 lbs 3286 kg

Hesston 80-66 Engine

Hesston 80-66 Engine Fiat 3.9L 4-cyl diesel Fuel tank:19.2 gal
72.7 L
Engine details ...

1985 - 1991

66 Series

Utility tractor

Fiat built

Series:

70-66 ←

80-66

Engine Detail

Engine Detail
Fiat 8045.05
diesel
4-cylinder
liquid-cooled
Displacement:	238.5 ci 3.9 L
Bore/Stroke:	4.094x4.527 inches 104 x 115 mm
Power:	80 hp 59.7 kW
Pre-heating:	ether
Compression:	17:1
Rated RPM:	2500
Starter:	electric
Starter volts:	12

Mechanical

Mechanical Chassis:4x2 2WD
4x4 MFWD 4WD
Steering:power
Brakes:differential mechanical wet disc
Cab:Four-post ROPS. Canopy optional.
Transmissions:12-speed partially synchronized
12-speed mechanical shuttle
20-speed creeper
Transmission details ...

1985 - 1991

66 Series

Utility tractor

Fiat built

Series:

70-66 ←

80-66

Transmissions overview

Transmissions overview
12-speed partially synchronized
12-speed mechanical shuttle
20-speed creeper

Transmission

Transmission
Type:	partially synchronized
Gears:	12 forward and 4 reverse
Four gears (1-4) in three ranges (I-III). Shifts between gears are synchronized.

Speeds

Speeds
With 18.4-30 rear tires.

Transmission

Transmission
Type:	mechanical shuttle
Gears:	12 forward and reverse
Four gears (1-4) in three ranges (I-III) with shuttle.

Speeds

Speeds
With 18.4-30 rear tires.

Transmission

Transmission
Type:	creeper
Gears:	20 forward and 8 reverse
Four gears (1-4) in three ranges (I-III) with normal and creeper ranges.

Speeds

Speeds
With 18.4-30 rear tires.

Hydraulics

Hydraulics Type:open center
Pressure:2700 psi
186.2 bar
Valves:1 to 3
Total flow:11 gpm
41.6 lpm

Tractor hitch

Tractor hitch Rear Type:II
Control:position and lower-link draft control
Rear lift:5194 lbs
2355 kg

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:independent
Rear RPM:540/ground
540/1000*Optional

Dimensions & Tires

Dimensions & Tires 2WD Wheelbase:90.7 inches
230 cm
4WD Wheelbase:88.5 inches
224 cm
Weight:5800 to 6535 pounds
Front tire:7.50-16
2WD Rear tire:18.4-30
Full dimensions and tires ...

1985 - 1991

66 Series

Utility tractor

Fiat built

Series:

70-66 ←

80-66

Hesston 80-66 Tires

Hesston 80-66 Tires
2WD Standard tires (ag):	Front: 7.50-16. Rear: 18.4-30
4WD Standard tires (ag):	Front: 12.4-24. Rear: 18.4-30

Dimensions

Dimensions
2WD Wheelbase:	90.7 inches 230 cm
4WD Wheelbase:	88.5 inches 224 cm
2WD Length:	139 inches 353 cm
4WD Length:	143 inches 363 cm
2WD Clearance (front axle):	21.5 inches 54 cm
4WD Clearance (front axle):	16 inches 40 cm
2WD Front tread:	55.1 to 74.75 inches 139 to 189 cm
4WD Front tread:	60.25 to 77 inches 153 to 195 cm
Rear tread:	55.1 to 78.75 inches 139 to 200 cm