Introduction
International Harvester 644: Technical Overview
The International Harvester 644 is a row-crop tractor manufactured in Neuss, Germany, between 1974 and 1980. It belongs to the 554 and 744 series and was designed as a reliable utility machine for various agricultural operations.
Engine and Performance
The tractor is powered by the International Harvester D-206 diesel engine. This 3.4-liter, 4-cylinder liquid-cooled engine produces 60 hp (44.7 kW) at a rated speed of 2150 RPM. The engine features a bore/stroke ratio of 98 x 111 mm, providing steady torque for field tasks.
Transmission and Hydraulics
The drivetrain consists of a manual transmission offering 8 forward and 4 reverse gears. It is equipped with a rear PTO capable of 540 or 1000 RPM, depending on the engine speed. The hydraulic system provides a pump flow of 7.9 gpm (29.9 lpm), supporting a Category II rear hitch with a lift capacity of 6394 lbs (2900 kg).
Mechanical and Dimensions
The 644 was available in both two-wheel drive and four-wheel drive configurations. It features manual steering and an open operator station. The wheelbase measures 87.8 inches (223 cm), with an overall length of 148.8 inches (377 cm) and a height of 98 inches (248 cm). Depending on the drive configuration, the tractor weighs between 6350 lbs (2880 kg) for the 2WD model and 7078 lbs (3210 kg) for the 4WD version.
Conclusion
The International Harvester 644 is a robust, mechanically straightforward tractor suited for mid-sized agricultural operations. Its combination of a 60 hp engine, dual-speed PTO, and significant lift capacity makes it an adaptable tool for general field work and row-crop maintenance.
International Harvester 644 Manuals & Documentation
Download the manuals and documentation available for the International Harvester 644: repair and workshop manuals, operator's handbooks, spare-parts catalogs and technical leaflets — free PDF files.
Archive documentation provided for reference, hosted by Tractor-Info.
Production Information of International Harvester, 644
- Row-Crop tractor
- Built in Neuss, Germany
| Manufacturer | International Harvester |
|---|
Dimension and Tires Information of International Harvester, 644
| Wheelbase | 87.8 inches [223 cm] |
|---|---|
| 4WD Weight | 7078 lbs [3210 kg] |
| 2WD Weight | 6350 lbs [2880 kg] |
| Length | 148.8 inches [377 cm] |
| Height | 98 inches [248 cm] |
| Ag front | 7.50-16 |
|---|---|
| Ag front(optional) | 9.5-24 (MFWD) |
| Ag rear | 16.9-30 |
Engine Specifications of International Harvester, 644
- International Harvester D-206
- Liquid-cooled
- Diesel
- 4-cylinder
| Power | 60 hp [44.7 kW] |
|---|---|
| Displacement | 206.4 ci [3.4 L] |
| Rated RPM | 2150 |
| Bore/Stroke | 3.875x4.38 inches [98 x 111 mm] |
| Starter volts | 12 |
Transmission Information of International Harvester, 644
Transmission variants 1
| Gears | 8 forward and 4 reverse |
|---|
Mechanical Specs of International Harvester, 644
- Two- or four-wheel drive
- Manual steering
- Open operator station.
Power Information of International Harvester, 644
| Rear PTO Type | 540/1000 |
|---|---|
| Engine RPM | 540@1982 |
| Engine RPM(optional) | 1000@2000 |
Hydraulics Specifications of International Harvester, 644
| Pump flow | 7.9 gpm [29.9 lpm] |
|---|
Three-Point Hitch of International Harvester, 644
| Rear Type | II |
|---|---|
| Rear lift | 6394 lbs [2900 kg] |
Electrical System of International Harvester, 644
| Ground | Negative |
|---|---|
| Battery volts | 12 |
Where it sits
With 60 HP, the International Harvester 644 sits between 554 (59 HP) and 744 (72 HP) in International Harvester's range. Its power puts it in the 42th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the International Harvester 644 have?
The International Harvester 644 delivers 60 HP.
What years was the International Harvester 644 produced?
The International Harvester 644 was produced in 1974-1980.
What engine does the International Harvester 644 have?
The International Harvester 644 is powered by a Diesel, 4-cylinder engine.
How much does the International Harvester 644 weigh?
The International Harvester 644 weighs 7078 lbs [3210 kg].
Is the International Harvester 644 4WD?
The International Harvester 644 is available in 2WD/4WD.