Farmall 766

The Farmall 766 is a tractor produced by Farmall. It is equipped with a 360 ci 5.9 L engine. The rated power output is 85.45 hp 63.7 kW. Transmission: Torque Amplifier. Operating weight: 10,300 lbs 4672 kg.

Overview

	66 SeriesRow-Crop tractor
66 Series
Row-Crop tractor

Series map: 76696688.6hp*91.0hp

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

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

Farmall 766 Power
Drawbar (tested)	73.37 hp 54.7 kW
PTO (tested)	85.45 hp 63.7 kW
Performance test details ...

Mechanical
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

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000

Dimensions & Tires
Wheelbase	105 inches 266 cm
Weight	10,300 lbs 4672 kg
Front tire	9.5L-15
Rear tire	18.4-34
Full dimensions and tires ...

Engine

Series map: 76696688.6hp*91.0hp

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

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

Engine Detail — 291 ci / 4.8 L Gasoline

Manufacturer	International Harvester C291
Fuel Type	Gasoline
Configuration	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 — 360 ci / 5.9 L Diesel

Manufacturer	International Harvester D360
Fuel Type	Diesel
Configuration	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

Series map: 76696688.6hp*91.0hp

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

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

Transmission — 8 forward and 4 reverse gear

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

Transmission — Torque Amplifier

Transmission	Torque Amplifier
Type	two-speed power shift
Gears	16 forward and 8 reverse
Clutch	dry disc
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

Series map: 76696688.6hp*91.0hp

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

Tests

Series map: 76696688.6hp*91.0hp

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

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

Nebraska Tractor Test 1094
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
Drawbar performance
Max power	71.32 hp 53.2 kW
Fuel use	7.3 gal/hour 27.6 l/hour
Gear 1-Hi-TA used for power test.
Max pull	8,841 lbs 4010 kg
Gear 2-Lo-Direct used for pull test.

Nebraska Tractor Test 1117
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
Drawbar performance
Max power	73.37 hp 54.7 kW
Fuel use	6.1 gal/hour 23.1 l/hour
Gear 1-Hi-TA used for power test.
Max pull	9,236 lbs 4189 kg
Gear 2-Lo-Direct used for pull test.

Photos

Farmall 766 with four-wheel drive.

Farmall 766 with four-wheel drive.