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Tractor data for over 20,000 different models.

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TractorSpex

Tractor data for over 20,000 different models.

Home > Farmall > 766

Farmall 766

Engine:

Farmall Standard

Power:

88 HP (Engine) / HP (PTO)

Fuel Type:

Diesel

Production:

1971 - 1976

Detailed Specifications

Overview


Overview
Summary	x66 Series Row-Crop tractor


Production
Manufacturer	Farmall (a part of International Harvester)
Summary	Row-Crop tractor / Built in Rock Island, Illinois, USA
Total built	10,799
Summary	Original price was $13,400 in 1976


Mechanical
Summary	Two-wheel drive / Power steering / Hydraulic dry disc brakes / Open operator station. Cab optional.


Hydraulics
Type	open center
Pump flow	12 gpm 45.4 lpm


Tractor hitch
Rear Type	2

Engine Specifications


Note: the Farmall model 766 is the same as the International Harvester 766. The following data is from the 766 listing.


Engine options
Summary	International Harvester 4.8L 6-cyl gasoline / International Harvester 5.9L 6-cyl diesel


Engine Detail
Summary	International Harvester C291 / gasoline / 6-cylinder / liquid-cooled
Displacement	291 ci 4.8 L
Bore/Stroke	3.75x4.39 inches 95 x 112 mm
Air cleaner	dual stage dry
Rated RPM	2400
Starter volts	12


Engine Detail
Summary	International Harvester D360 / diesel / 6-cylinder / liquid-cooled
Displacement	360 ci 5.9 L
Bore/Stroke	3.875x5.0625 inches 98 x 129 mm
Compression	17:1
Rated RPM	2400
Starter volts	12

Transmission & PTO


Note: the Farmall model 766 is the same as the International Harvester 766. The following data is from the 766 listing.


Transmission options
Summary	8-speed gear / 16-speed two-speed power shift


Transmission
Type	gear
Gears	8 forward and 4 reverse
Clutch	dry disc
Summary	Four gears (1-4) in low and high ranges.


Transmission
Transmission	Torque Amplifier
Type	two-speed power shift
Gears	16 forward and 8 reverse
Clutch	dry disc
Summary	Four gears (1-4) in two ranges (low/high) with the Torque Amplifer (TA) power shift. The TA allows a shift-on-the-move between direct drive and a lower speed.

Dimensions & Weight


Note: the Farmall model 766 is the same as the International Harvester 766. The following data is from the 766 listing.


Farmall 766 Tires
Ag front	9.5L-15
Ag rear	18.4-34


Dimensions
Wheelbase	105 inches 266 cm
Length	165 inches 419 cm
Width	98 inches 248 cm
Height (exhaust)	105 inches 266 cm
Operating weight	10,300 lbs 4672 kg
Ballasted weight	11,880 lbs 5388 kg
Clearance (drawbar)	14 inches 35 cm
Front tread	60 to 84 inches 152 to 213 cm
Rear tread	56 to 100 inches 142 to 254 cm

Performance Tests


Note: the Farmall model 766 is the same as the International Harvester 766. The following data is from the 766 listing.


Tractor Tests
Summary	NTTL 1094: gasoline Torque Amplifier 2WD / NTTL 1117: diesel Torque Amplifier 2WD


Nebraska Tractor Test 1094
Summary	Gasoline Torque Amplifier 2WD 4/20/1972 Link: Nebraska Tractor Test 1094 file / PTO performance
Power at rated engine speed	79.73 hp 59.5 kW
Fuel use	7.1 gal/hour 26.9 l/hour
Power at rated PTO speed	73.96 hp 55.2 kW
Fuel use	6.3 gal/hour 23.8 l/hour
Summary	Drawbar performance
Max power	71.32 hp 53.2 kW
Fuel use	7.3 gal/hour 27.6 l/hour
Summary	Gear 1-Hi-TA used for power test.
Max pull	8,841 lbs 4010 kg
Summary	Gear 2-Lo-Direct used for pull test.


Nebraska Tractor Test 1117
Summary	Diesel Torque Amplifier 2WD November 10 - December 5, 1972 Link: Nebraska Tractor Test 1117 file / PTO performance
Power at rated engine speed	85.45 hp 63.7 kW
Fuel use	6.2 gal/hour 23.5 l/hour
Power at rated PTO speed	85.66 hp 63.9 kW
Fuel use	5.8 gal/hour 22.0 l/hour
Summary	Drawbar performance
Max power	73.37 hp 54.7 kW
Fuel use	6.1 gal/hour 23.1 l/hour
Summary	Gear 1-Hi-TA used for power test.
Max pull	9,236 lbs 4189 kg
Summary	Gear 2-Lo-Direct used for pull test.

Last Database Update: 12/7/2025