International Harvester

International Harvester 766

The International Harvester 766 is a row-crop tractor produced from 1971 to 1976 as part of the 66 Series. It was built in Rock Island, Illinois, USA, with a total production of 10,799 units. The tractor features two engine options: a 4.8L 6-cylinder gasoline engine and a 5.9L 6-cylinder diesel engine. Transmission options include an 8-speed gear and a 16-speed two-speed power shift with Torque Amplifier. The 766 offers 73.37 hp at the drawbar and 85.45 hp at the PTO. It has two-wheel drive, power steering, hydraulic dry disc brakes, and an open operator station with an optional cab. Hydraulics are open center with a 12 gpm pump flow. The tractor has independent rear PTO with 540/1000 rpm options. Dimensions include a 105 inch wheelbase, 165 inch length, 98 inch width, and 105 inch height. Operating weight is 10,300 lbs, ballasted weight 11,880 lbs. Tires are 9.5L-15 front and 18.4-34 rear. The serial number is located on the left side of the clutch housing.
Power88 hp[P]
Founded1971 - 1976
Model766

Technical Specifications

Detailed specifications and technical data for International Harvester 766

Power
PTO (tested)85.45 hp (63.7 kW)
Drawbar (tested)73.37 hp (54.7 kW)
Engine
C291 type6-cylinder, liquid-cooled
D360 type6-cylinder, liquid-cooled
Fuel tank37 gal (140.0 L)
Rated RPM2400
Air cleanerdual stage dry
Bore/Stroke3.75x4.39 inches (95 x 112 mm)
Compression17:1
Displacement291 ci (4.8 L)
Starter volts12
Engine optionsInternational Harvester 4.8L 6-cyl gasoline, International Harvester 5.9L 6-cyl diesel
Rated RPM diesel2400
Bore/Stroke diesel3.875x5.0625 inches (98 x 129 mm)
Displacement diesel360 ci (5.9 L)
Starter volts diesel12
Hydraulics
Typeopen center
Pump flow12 gpm (45.4 lpm)
Mechanical
DriveTwo-wheel drive
BrakesHydraulic dry disc brakes
SteeringPower steering
Operator stationOpen operator station. Cab optional.
Production
TypeRow-Crop tractor
Series66 Series
Built inRock Island, Illinois, USA
Total built10,799
Original price$13,400 in 1976
Years produced1971 - 1976
Transmission
Gear transmission
Typegear
Gears8 forward and 4 reverse
NotesFour gears (1-4) in low and high ranges.
Clutchdry disc
Transmission options8-speed gear, 16-speed two-speed power shift
Torque Amplifier transmission
Typetwo-speed power shift
Gears16 forward and 8 reverse
NotesFour gears (1-4) in two ranges (low/high) with the Torque Amplifier (TA) power shift. The TA allows a shift-on-the-move between direct drive and a lower speed.
Clutchdry disc
Tractor hitch
Rear Type2
Serial Numbers
19717101
19727416
19739611
197412378
197514630
197616840
Dimensions & Tires
Width98 inches (248 cm)
Length165 inches (419 cm)
Rear tire18.4-34
Wheelbase105 inches (266 cm)
Front tire9.5L-15
Rear tread56 to 100 inches (142 to 254 cm)
Front tread60 to 84 inches (152 to 213 cm)
Ballasted weight11,880 lbs (5388 kg)
Height (exhaust)105 inches (266 cm)
Operating weight10,300 lbs (4672 kg)
Clearance (drawbar)14 inches (35 cm)
Power Take-off (PTO)
Rear PTOindependent
Rear PTO Type540/1000
Serial Number Location
LocationLeft side of clutch housing