International Harvester 1566
Power
183 hp
Production
1974-1976
Engine
Turbocharged diesel, 6-cylinder
Transmission
Torque Amplifier
Drive
2WD
From the same series:
Introduction
International Harvester 1566 Row-Crop Tractor
The International Harvester 1566 is a high-horsepower row-crop tractor produced between 1974 and 1976. Manufactured in Rock Island, Illinois, USA, this machine was designed to provide significant tractive force for large-scale agricultural operations during the mid-1970s.
Engine and Performance
The tractor is powered by the International Harvester DT-436, a 7.1-liter, 6-cylinder turbocharged diesel engine. It generates 183 hp at a rated speed of 2600 RPM. The engine features a liquid-cooling system and a compression ratio of 16:1, ensuring consistent power output for heavy-duty field work.
Transmission and Drivetrain
The 1566 utilizes a Torque Amplifier transmission, which incorporates a two-speed power shift mechanism. This configuration provides 12 forward and 6 reverse gears, allowing the operator to shift on the go under load. The tractor is equipped with a two-wheel drive system and planetary final drives to manage the high torque output.
Hydraulics and PTO
The hydraulic system is of the open-center type, delivering a pump flow of 12 gpm (45.4 lpm). It supports optional front and rear valves to operate various implements. The independent rear PTO operates at 1000 RPM, engaged at an engine speed of 2300 RPM, providing steady power for high-demand equipment.
Operator Station and Dimensions
The machine features an open operator station as standard, with a factory cab including air conditioning available as an option. With a wheelbase of 105 inches (266 cm) and a total length of 168 inches (426 cm), the tractor offers a stable platform for field operations. Control is managed via power steering and hydraulic wet disc brakes.
Conclusion
The International Harvester 1566 serves as a robust, high-performance solution for demanding row-crop farming tasks. Its combination of a high-torque 6-cylinder engine, versatile transmission, and substantial build quality makes it a durable workhorse for large-scale agricultural environments.
Production Information of International Harvester, 1566
- Original price was $26,250 in 1976
- Row-Crop tractor
- Built in Rock Island, Illinois, USA
| Manufacturer | International Harvester |
|---|---|
| Total built | 7,417 |
Dimension and Tires Information of International Harvester, 1566
| Front tread | 62 to 86 inches [157 to 218 cm] |
|---|---|
| Wheelbase | 105 inches [266 cm] |
| Height (exhaust) | 125 inches [317 cm] |
| Height (cab) | 117 inches [297 cm] |
| Length | 168 inches [426 cm] |
| Front tread | 56 to 80 inches [142 to 203 cm (optional)] |
| Clearance (drawbar) | 17 inches [43 cm] |
| Width | 112 inches [284 cm] |
| Rear tread | 66 to 120 inches [167 to 304 cm] |
Width over axle ends.
| Ag front | 11L-15 |
|---|---|
| Ag rear | 20.8-38 |
Engine Specifications of International Harvester, 1566
- International Harvester DT-436
- Liquid-cooled
- Turbocharged diesel
- 6-cylinder
| Oil capacity | 20 qts [18.9 L] |
|---|---|
| Displacement | 436 ci [7.1 L] |
| Compression | 16:1 |
| Bore/Stroke | 4.30x5.00 inches [109 x 127 mm] |
| Coolant capacity | 26 qts [24.6 L] |
| Idle RPM | 900-2600 |
| Rated RPM | 2600 |
| Power | 183 hp [136.5 kW] |
Transmission Information of International Harvester, 1566
Transmission variants 1
| Transmission | Torque Amplifier |
|---|---|
| Type | Two-speed power shift |
| Gears | 12 forward and 6 reverse |
Mechanical Specs of International Harvester, 1566
- Two-wheel drive
- Open operator station. Cab available with air-conditioning.
- Hydraulic wet disc brakes
- Power steering
| Final drives | Planetary |
|---|
Power Information of International Harvester, 1566
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 |
| Engine RPM | 1000@2300 |
Hydraulics Specifications of International Harvester, 1566
| Type | Open center |
|---|---|
| Pump flow | 12 gpm [45.4 lpm] |
| Rear valves(optional) | 2 |
| Front valves(optional) | 2 |
Three-Point Hitch of International Harvester, 1566
| Rear Type | III/II |
|---|---|
| Control | Lower-link draft sensing |
Electrical System of International Harvester, 1566
| Charging system | Alternator |
|---|
Where it sits
With 183 HP, the International Harvester 1566 sits just above 1586 (177 HP) in International Harvester's range. Its power puts it in the 88th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the International Harvester 1566 have?
The International Harvester 1566 delivers 183 HP.
What years was the International Harvester 1566 produced?
The International Harvester 1566 was produced in 1974-1976.
What engine does the International Harvester 1566 have?
The International Harvester 1566 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the International Harvester 1566 use?
The International Harvester 1566 uses a Torque Amplifier transmission.
Is the International Harvester 1566 4WD?
The International Harvester 1566 is available in 2WD.