International Harvester TD-25
Power
230 hp
Production
1959-1962
Engine
Turbocharged diesel, 6-cylinder
Transmission
Two-speed power shift
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Introduction
International Harvester TD-25 Crawler Tractor
The International Harvester TD-25 is a heavy-duty crawler tractor produced between 1959 and 1962. Manufactured in Melrose Park, Illinois, this machine belongs to the agricultural crawler segment, designed for high-traction tasks requiring significant power and stability.
Engine and Performance
The tractor is powered by an International Harvester 6-cylinder turbocharged diesel engine with a displacement of 817 cubic inches (13.4 L). It utilizes a liquid-cooled vertical L-head design with direct fuel injection. The engine operates at a rated speed of 1500 RPM, delivering a net power output of 230 hp (171.5 kW), which provides the torque necessary for heavy pulling applications.
Transmission and Drive
The drivetrain features a two-speed power shift transmission providing 8 forward and 8 reverse gears. Power is transferred through a 406.4mm dry disc clutch. The tractor utilizes a crawler drive system with 24-inch tracks, ensuring optimal weight distribution and traction across challenging terrain.
Mechanical and Electrical Systems
The machine features an open operator station for direct visibility of the work area. The electrical system is powered by a generator with a 15-amp charging capacity. It utilizes a 6-volt electrical setup comprising four batteries, each rated at 204 AH, while the starter system operates on 24 volts.
Dimensions and Capacity
With a total weight of 45,550 lbs (20,661 kg), the TD-25 is built for substantial ground engagement. Maintenance capacities include 34 quarts (32.2 L) of engine oil and a significant transmission oil capacity of 192.2 quarts (181.9 L), alongside a 74.5-quart (70.5 L) cooling system.
Conclusion
With 529 units manufactured, the International Harvester TD-25 serves as a specialized heavy-duty tractor. Its combination of high-displacement diesel power, specialized track drive, and robust transmission makes it suitable for demanding agricultural and earthmoving operations.
Production Information of International Harvester, TD-25
- Agricultural Crawler tractor
- Built in Melrose Park, Illinois, USA
| Manufacturer | International Harvester |
|---|---|
| Total built | 529 |
Engine Specifications of International Harvester, TD-25
- International Harvester
- Liquid-cooled vertical L-head
- 6-cylinder
- Turbocharged diesel
| Fuel system | Direct injection |
|---|---|
| Rated RPM | 1500 |
| Displacement | 817 ci [13.4 L] |
| Bore/Stroke | 5.375x6.00 inches [137 x 152 mm] |
| Power (net) | 230 hp [171.5 kW] |
| Compression | 15.35:1 |
| Air cleaner | Dry |
| Coolant capacity | 74.5 qts [70.5 L] |
| Oil capacity | 34 qts [32.2 L] |
| Starter volts | 24 |
Transmission Information of International Harvester, TD-25
Transmission variants 1
| Type | Two-speed power shift |
|---|---|
| Oil capacity | 192.2 qts [181.9 L] |
| Gears | 8 forward and reverse |
| Clutch | 406.4mm dry disc |
Mechanical Specs of International Harvester, TD-25
- Open operator station.
| Drive | Crawler |
|---|
Power Information of International Harvester, TD-25
- Https://www.tractordata.com/farm-tractors/003/3/2/3323-international-harvester-td-25-tests.html
Electrical System of International Harvester, TD-25
| Charging system | Generator |
|---|---|
| Battery AH | 204 |
| Battery volts | 6 |
| Charging amps | 15 |
| Batteries | 4 |
Where it sits
With 230 HP, the International Harvester TD-25 sits between 4366 (225 HP) and 7488 (235 HP) in International Harvester's range. Its power puts it in the 99th percentile of 1950s models in our database (592 machines).
Frequently asked questions
How much horsepower does the International Harvester TD-25 have?
The International Harvester TD-25 delivers 230 HP.
What years was the International Harvester TD-25 produced?
The International Harvester TD-25 was produced in 1959-1962.
What engine does the International Harvester TD-25 have?
The International Harvester TD-25 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the International Harvester TD-25 use?
The International Harvester TD-25 uses a Two-speed power shift transmission.