The International Harvester 1566 is a 2WD row-crop tractor from the 66 series. This tractor was manufactured by International Harvester from 1974 to 1976. The IH 1566 is equipped with a 7.1 L (436.0 cu·in) six-cylinder diesel engine and sliding gear transmission with 12 forward and 6 reverse gears.
The International Harvester 1566 row-crop tractor used the International Harvester DT436 engine. It is a 7.1 L, 7,145 cm2, (436.0 cu·in) six-cylinder turbocharged diesel engine with 109.0 mm (4.29 in) of the cylinder bore and 127.0 mm (5.0 in) of the piston stroke. This engine produced 163.3 PS (120.1 kW; 161.0 HP) of PTO output power.
International Harvester 1566 Specifications
| General Specifications | |
| Model | International Harvester 1566 |
| Length | – |
| Width | – |
| Height | – |
| Wheel base | 2,660 mm (104.7 in) |
| Weight | 5,840 kg (12,875 lbs) |
| Fuel tank capacity | 159.0 liters (42 US gal.; 35 Imp. gal) |
| Battery | – |
| Cabin type | Cab (standard) |
| Engine | |
| Engine model | International Harvester DT436 |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 6 |
| Fuel type | Diesel |
| Displacement | 7.1 L, 7,145 cm2, (436.0 cu·in) |
| Bore and stroke | 109.0 mm X 127.0 mm (4.29 in X 5 in) |
| Horsepower | 163.3 PS (120.1 kW; 161.0 HP) |
| Starter | Electric |
| Coolant capacity: | 24.6 L (26 US. qt, 21.6 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×2 2WD |
| Steering type | – |
| Brakes | – |
| Transmission model | – |
| Transmission type | Sliding gear |
| Gears | 12 forward and 6 reverse |
| Tires | |
| Front tires | Ag: 11L-15 |
| Rear tires | Ag: 20.8-38 |
| Three-Point Hitch | |
| Caterogy | III/II |
| Control type | – |
| Lift capacity (at ends) | – |
| PTO (Power take-off shaft) | |
| Rear PTO type | Independent |
| Rear PTO speed | 1,000 rpm |
| Hydraulic system | |
| Hydraulic type | Open center |
| Valves | 1 |
| Pump flow | 45.4 gpm (171.9 lpm) |