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 type | 6-cylinder, liquid-cooled |
|---|---|
| D360 type | 6-cylinder, liquid-cooled |
| Fuel tank | 37 gal (140.0 L) |
| Rated RPM | 2400 |
| Air cleaner | dual stage dry |
| Bore/Stroke | 3.75x4.39 inches (95 x 112 mm) |
| Compression | 17:1 |
| Displacement | 291 ci (4.8 L) |
| Starter volts | 12 |
| Engine options | International Harvester 4.8L 6-cyl gasoline, International Harvester 5.9L 6-cyl diesel |
| Rated RPM diesel | 2400 |
| Bore/Stroke diesel | 3.875x5.0625 inches (98 x 129 mm) |
| Displacement diesel | 360 ci (5.9 L) |
| Starter volts diesel | 12 |
Hydraulics
| Type | open center |
|---|---|
| Pump flow | 12 gpm (45.4 lpm) |
Mechanical
| Drive | Two-wheel drive |
|---|---|
| Brakes | Hydraulic dry disc brakes |
| Steering | Power steering |
| Operator station | Open operator station. Cab optional. |
Production
| Type | Row-Crop tractor |
|---|---|
| Series | 66 Series |
| Built in | Rock Island, Illinois, USA |
| Total built | 10,799 |
| Original price | $13,400 in 1976 |
| Years produced | 1971 - 1976 |
Transmission
| Gear transmission | Typegear Gears8 forward and 4 reverse NotesFour gears (1-4) in low and high ranges. Clutchdry disc |
|---|---|
| Transmission options | 8-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 Type | 2 |
|---|
Serial Numbers
| 1971 | 7101 |
|---|---|
| 1972 | 7416 |
| 1973 | 9611 |
| 1974 | 12378 |
| 1975 | 14630 |
| 1976 | 16840 |
Dimensions & Tires
| Width | 98 inches (248 cm) |
|---|---|
| Length | 165 inches (419 cm) |
| Rear tire | 18.4-34 |
| Wheelbase | 105 inches (266 cm) |
| Front tire | 9.5L-15 |
| Rear tread | 56 to 100 inches (142 to 254 cm) |
| Front tread | 60 to 84 inches (152 to 213 cm) |
| Ballasted weight | 11,880 lbs (5388 kg) |
| Height (exhaust) | 105 inches (266 cm) |
| Operating weight | 10,300 lbs (4672 kg) |
| Clearance (drawbar) | 14 inches (35 cm) |
Power Take-off (PTO)
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 540/1000 |
Serial Number Location
| Location | Left side of clutch housing |
|---|
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