Introduction
International Harvester 966: Agricultural Row-Crop Tractor
The International Harvester 966 is a row-crop tractor produced between 1971 and 1976 at the Farmall plant in Rock Island, Illinois. Part of the 766 and Hydro 100 series, this model was designed for versatile field operations and heavy-duty agricultural tasks.
Engine Specifications
The tractor is powered by the International Harvester D414, a 6-cylinder, liquid-cooled diesel engine with a displacement of 414 cubic inches (6.8 liters). It features a bore and stroke of 4.30 by 4.75 inches and is equipped with a dual dry element air cleaner. The engine operates at a rated speed of 2400 RPM for early models and 2600 RPM for late models, generating 91 horsepower.
Transmission and Drivetrain
The 966 offers three transmission configurations: an 8-speed gear transmission, a 16-speed two-speed power shift equipped with a Torque Amplifier, and a hydrostatic option. The Torque Amplifier allows for on-the-move shifting between direct drive and a slower underdrive ratio without the need for clutching. The tractor is available in both two-wheel and four-wheel drive variants.
Hydraulics and Hitch
The open-center hydraulic system provides a total flow of 21 gallons per minute, with 9 gallons per minute dedicated to steering. It operates at a pressure of 2000 psi and supports up to four valves. The rear hitch is a Category II type featuring the IH Fast Hitch, providing a lift capacity of 5,000 lbs measured at 24 inches behind the lift point.
Operator Environment and Dimensions
The machine is built on a 105-inch wheelbase with a ground clearance of 14 inches. It features power steering and independent hydraulic dry disc brakes for maneuverability and safety. An optional cab was available, providing the operator with heating and air-conditioning systems for improved comfort during extended field operations.
Conclusion
With its robust engine, multiple transmission options, and substantial hydraulic capacity, the International Harvester 966 served as a reliable row-crop workhorse for mid-to-large scale farming operations throughout the 1970s.
Production Information of Farmall, 966
- Original price was $18,000 in 1976
- Row-Crop tractor
- Built in Rock Island, Illinois, USA
| Manufacturer | Farmall (a part of International Harvester) |
|---|---|
| Total built | 21,017 |
Dimension and Tires Information of Farmall, 966
| Wheelbase | 105 inches [266 cm] |
|---|---|
| Ground clearance | 14 inches [35 cm] |
| Height (exhaust) | 105 inches [266 cm] |
| Length | 165 inches [419 cm] |
| Width | 98 inches [248 cm] |
| Ag front | 9.5L-15 |
|---|---|
| Ag rear | 18.4-34 |
Engine Specifications of Farmall, 966
- International Harvester D414
- Liquid-cooled
- Diesel
- 6-cylinder
| Firing order | 1-5-3-6-2-4 |
|---|---|
| Displacement | 414 ci [6.8 L] |
| Air cleaner | Dual dry elements |
| Bore/Stroke | 4.30x4.75 inches [109 x 121 mm] |
| Coolant capacity | 24 qts [22.7 L] |
| Oil capacity | 12 qts [11.4 L] |
| Oil capacity(optional) | 2600 (late) |
| Rated RPM | 2400 (early) |
| Power | 91 hp [67.9 kW] |
Transmission Information of Farmall, 966
Transmission variants 1
- Four gears each provided in high, low, and reverse ranges.
| Type | Gear |
|---|---|
| Oil capacity | 90 qts [85.2 L] |
| Gears | 8 forward and 4 reverse |
| Clutch | Dry disc |
Transmission variants 2
- The Torque Amplifier (TA) provides a shift-on-the-move underdrive to the standard transmission. In any gear and range, the transmission can be shifted from direct drive (DD) to the slower TA speed by simply pulling the TA lever back. No clutching or stopping is needed.
| Transmission | Torque Amplifier |
|---|---|
| Clutch | Dry disc |
| Type | Two-speed power shift |
| Gears | 16 forward and 8 reverse |
Transmission variants 3
- The hydrostatic transmission option ended in 1973 when the Hydro 100 began production.
| Type | Hydrostatic |
|---|---|
| Gears | Infinite forward and reverse |
- 8-speed gear
- 16-speed two-speed power shift
- Hydrostatic
Mechanical Specs of Farmall, 966
- Two- or four-wheel drive
- Cab optional with heat and air-conditioning.
- Power steering
- Independent hydraulic dry disc brakes
Power Information of Farmall, 966
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540/1000 |
Hydraulics Specifications of Farmall, 966
| Steering flow | 9 gpm [34.1 lpm] |
|---|---|
| Type | Open center |
| Pump flow | 12 gpm [45.4 lpm] |
| Valves | 1 to 4 |
| Capacity | 22.5 gal [85.2 L] |
| Steering press. | 1550 psi [106.9 bar] |
| Total flow | 21 gpm [79.5 lpm] |
| Pressure | 2000 psi [137.9 bar] |
Three-Point Hitch of Farmall, 966
| Rear Type | II |
|---|---|
| Rear lift | 5000 lbs (at 24 inches) [2268 kg] |
| Rear lift (at 24"/610mm) | 4400 lbs [1995 kg] |
| Type | IH Fast Hitch |
Electrical System of Farmall, 966
| Charging amps | 32 |
|---|---|
| Battery AH | 172 |
| Batteries | 2 |
| Battery volts | 6 |
Where it sits
With 91 HP, the Farmall 966 sits between 766 (88 HP) and Hydro 100 (115 HP) in Farmall's range. Its power puts it in the 64th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the Farmall 966 have?
The Farmall 966 delivers 91 HP.
What years was the Farmall 966 produced?
The Farmall 966 was produced in 1971-1976.
What engine does the Farmall 966 have?
The Farmall 966 is powered by a Diesel, 6-cylinder engine.
What transmission does the Farmall 966 use?
The Farmall 966 uses a Gear transmission.
Is the Farmall 966 4WD?
The Farmall 966 is available in 2WD/4WD.