International Harvester TD-18A
Power
112 hp[B] hp
Production
1949-1958
Engine
Diesel, 6-cylinder
Transmission
Gear
From the same series:
Introduction
International Harvester TD-18A Crawler Tractor
The International Harvester TD-18A is a heavy-duty agricultural crawler tractor produced between 1949 and 1958. Manufactured at the International Harvester facility in Melrose Park, Illinois, USA, this machine was designed to provide significant tractive power for demanding field and industrial operations.
Engine and Performance
The tractor is powered by the International Harvester D-691, a liquid-cooled, 6-cylinder diesel engine. With a displacement of 691.1 cubic inches (11.3 liters) and a compression ratio of 15.5:1, the unit delivers 112 horsepower at a rated engine speed of 1,350 RPM. The engine utilizes a gasoline-start system with a 12-volt starter and an oil bath air cleaner to maintain operational consistency.
Transmission and Drivetrain
Power is transferred to the tracks via a mechanical transmission providing 6 forward gears and 2 reverse gears. This gear configuration allows for a range of speeds suitable for heavy cultivation or pulling tasks. The crawler design ensures high flotation and traction across various ground conditions.
Handling and Braking
Maneuverability is managed through mechanical steering clutches, which allow the operator to independently control the drive to each track. Stopping power is provided by mechanical contracting band brakes, ensuring reliable control of the machine's substantial mass.
Physical Specifications
The TD-18A is a heavy-class tractor, with an operating weight ranging between 22,830 and 23,630 pounds. It features an open operator station designed for visibility and accessibility during long periods of operation. A total of 22,016 units were produced throughout its manufacturing cycle.
Conclusion
The International Harvester TD-18A represents a period of robust mechanical engineering in agricultural machinery. Its heavy-duty construction, combined with a high-torque diesel engine, makes it a significant model for heavy land preparation and large-scale farming applications of the mid-20th century.
Production Information of International Harvester, TD-18A
- Agricultural Crawler tractor
- Built in Melrose Park, Illinois, USA
| Manufacturer | International Harvester |
|---|---|
| Total built | 22,016 |
Engine Specifications of International Harvester, TD-18A
- International Harvester D-691
- Liquid-cooled vertical I-head
- Diesel
- 6-cylinder
| Starter volts | 12 |
|---|---|
| Displacement | 691.1 ci [11.3 L] |
| Compression | 15.5:1 |
| Bore/Stroke | 4.75x6.50 inches [121 x 165 mm] |
| Coolant capacity | 104 qts [98.4 L] |
| Oil capacity | 26 qts [24.6 L] |
| Starter | Gasoline-start |
| Rated RPM | 1350 |
| Air cleaner | Oil bath |
Transmission Information of International Harvester, TD-18A
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 6 forward and 2 reverse |
Mechanical Specs of International Harvester, TD-18A
- Open operator station.
- Mechanical contracting band brakes
| Drive | Crawler |
|---|---|
| Steering | Mechanical steering clutches |
Power Information of International Harvester, TD-18A
- Https://www.tractordata.com/farm-tractors/007/0/9/7092-international-harvester-td-18a-tests.html
Where it sits
With 112 hp[B] HP, the International Harvester TD-18A sits just above TD-18 (89 HP) in International Harvester's range. Its power puts it in the 98th percentile of 1940s models in our database (263 machines).
Frequently asked questions
How much horsepower does the International Harvester TD-18A have?
The International Harvester TD-18A delivers 112 hp[B] HP.
What years was the International Harvester TD-18A produced?
The International Harvester TD-18A was produced in 1949-1958.
What engine does the International Harvester TD-18A have?
The International Harvester TD-18A is powered by a Diesel, 6-cylinder engine.
What transmission does the International Harvester TD-18A use?
The International Harvester TD-18A uses a Gear transmission.