International Harvester 1256
Power
125 hp[P] hp
Production
1967-1969
Engine
Turbocharged diesel, 6-cylinder
Transmission
Gear
Drive
2WD/4WD
From the same series:
Introduction
International Harvester 1256 Standard-Tread Tractor
The International Harvester 1256 is a standard-tread agricultural tractor produced between 1967 and 1969 in Rock Island, Illinois. Part of the International Harvester lineup during the late 1960s, this model served as a heavy-duty workhorse designed for demanding field operations.
Engine and Performance
The tractor is powered by the International Harvester DT407, a 6.7-liter, 6-cylinder turbocharged diesel engine. It features a liquid-cooling system and a compression ratio of 17:1. The engine is rated at 2400 RPM, providing a power output of approximately 125 horsepower. The machine utilizes a dual dry element air cleaner to maintain performance in dusty agricultural environments.
Transmission and Drivetrain
The 1256 offers two transmission configurations. The standard gear transmission provides 8 forward and 4 reverse speeds. Alternatively, the Torque Amplifier (TA) transmission offers 16 forward and 8 reverse speeds, utilizing a partial power shift system that allows for clutchless shifting from direct drive to a lower TA speed across all gears.
Hydraulics and PTO
Equipped with an open-center hydraulic system, the tractor delivers a pump flow of 8 gpm (30.3 lpm) through a single valve. The rear independent PTO operates at 1000 RPM at an engine speed of 2100 RPM, providing consistent power for heavy implements. The tractor is configured with a Category III/II rear hitch.
Mechanical and Operator Station
The tractor features power steering and independent hydraulic dry disc brakes for operational control. It is available in two- or four-wheel drive configurations. The operator station comes standard as an open platform with an optional two-post ROPS or a full cab equipped with heating and air conditioning to facilitate varied working conditions.
Conclusion
With its robust 6-cylinder turbocharged engine and versatile transmission options, the International Harvester 1256 is well-suited for heavy tillage and traction tasks. Its balanced dimensions and flexible configuration options made it a capable tool for large-scale farming operations during its production era.
Production Information of International Harvester, 1256
- Original price was $10,700 in 1969
- Standard-tread tractor
- Built in Rock Island, Illinois, USA
| Manufacturer | International Harvester |
|---|
Dimension and Tires Information of International Harvester, 1256
| Wheelbase | 105 inches (Farmall) [266 cm] |
|---|---|
| Height (steering wheel) | 86 inches [218 cm] |
| Width | 92 inches [233 cm] |
| Width(optional) | 92 inches (International) [233 cm] |
| Length | 164 inches [416 cm] |
| Standard tires (ag) | Front: 10.00-16. Rear: 18.4-38 (Farmall) |
|---|---|
| Standard tires (ag)(optional) | Front: 11.00-16. Rear: 24.5-32 (International) |
Engine Specifications of International Harvester, 1256
- International Harvester DT407
- Liquid-cooled
- Turbocharged diesel
- 6-cylinder
| Oil capacity | 15 qts [14.2 L] |
|---|---|
| Displacement | 406.9 ci [6.7 L] |
| Compression | 17:1 |
| Bore/Stroke | 4.321x4.625 inches [110 x 117 mm] |
| Coolant capacity | 24 qts [22.7 L] |
| Starter volts | 12 |
| Rated RPM | 2400 |
| Air cleaner | Dual dry elements |
Transmission Information of International Harvester, 1256
Transmission variants 1
- The 1256's transmission provides four gears (1-4) in high, low, and reverse ranges.
| Type | Gear |
|---|---|
| Gears | 8 forward and 4 reverse |
| Oil capacity | 68 qts [64.4 L] |
Transmission variants 2
- Four gears (1-4) in two ranges (low/high) plus reverse range. The Torque Amplifier (TA) allows a clutchless shift from direct drive (DD) to the lower TA speed in all gears and ranges.
| Transmission | Torque Amplifier |
|---|---|
| Oil capacity | 68 qts [64.4 L] |
| Type | Partial power shift |
| Gears | 16 forward and 8 reverse |
- 8-speed gear
- 16-speed partial power shift
Mechanical Specs of International Harvester, 1256
- Two- or four-wheel drive
- Open operator station. Two-post ROPS optional. Cab optional with heat and air-conditioning.
- Power steering
- Independent hydraulic dry disc brakes
Power Information of International Harvester, 1256
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 |
| Engine RPM | 1000@2100 |
Hydraulics Specifications of International Harvester, 1256
| Type | Open center |
|---|---|
| Valves | 1 |
| Pump flow | 8 gpm [30.3 lpm] |
Three-Point Hitch of International Harvester, 1256
| Rear Type | III/II |
|---|
Electrical System of International Harvester, 1256
| Charging system | Alternator |
|---|---|
| Battery AH | 204 |
| Battery volts | 6 |
| Charging amps | 55 |
| Batteries | 2 |
Where it sits
With 125 hp[P] HP, the International Harvester 1256 sits between 856 (111 HP) and 1456 (144 HP) in International Harvester's range. Its power puts it in the 92th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the International Harvester 1256 have?
The International Harvester 1256 delivers 125 hp[P] HP.
What years was the International Harvester 1256 produced?
The International Harvester 1256 was produced in 1967-1969.
What engine does the International Harvester 1256 have?
The International Harvester 1256 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the International Harvester 1256 use?
The International Harvester 1256 uses a Gear transmission.
Is the International Harvester 1256 4WD?
The International Harvester 1256 is available in 2WD/4WD.