International Harvester

International Harvester TD-18A

The International Harvester TD-18A is an agricultural crawler tractor produced from 1949 to 1958 by International Harvester in Melrose Park, Illinois, USA. It features a 6-cylinder 11.3L diesel engine with an estimated 112.2 hp engine power. The tractor has a 6-speed gear transmission with 2 reverse gears, mechanical steering clutches, and mechanical contracting band brakes. It was built in two track gauges with shipping weights ranging from 22,830 to 23,630 pounds. A total of 22,016 units were built. The TD-18A is the successor to the TD-18 model.

Power112 hp[B]

Founded1949 - 1958

ModelTD-18A

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Technical Specifications

Detailed specifications and technical data for International Harvester TD-18A

Power

Belt (tested)	97.83 hp (73.0 kW)
Belt (claimed)	101 hp (75.3 kW)
Drawbar (tested)	85.61 hp (63.8 kW)
Drawbar (claimed)	87 hp (64.9 kW)

Engine

Type	diesel
Model	International Harvester D-691
Cooling	liquid-cooled vertical I-head
Starter	gasoline-start
Aux. fuel	1.33 gal (5.0 L)
Cylinders	6-cylinder
Fuel tank	60 gal (227.1 L)
Rated RPM	1350
Air cleaner	oil bath
Bore/Stroke	4.75x6.50 inches (121 x 165 mm)
Displacement	691.1 ci (11.3 L)
Oil capacity	26 qts (24.6 L)
Starter volts	12
Coolant capacity	104 qts (98.4 L)
Compression ratio	15.5:1

Dimensions

Width	95 inches (241 cm)
Height	106 inches (269 cm)
Length	166 inches (421 cm)
Shipping weight	22830 lbs (narrow gauge) (10355 kg), 23630 lbs (wide gauge) (10718 kg)

Mechanical

Drive	crawler
Brakes	Mechanical contracting band brakes
Steering	mechanical steering clutches
Operator station	Open operator station

Production

Type	Agricultural Crawler tractor
Built in	Melrose Park, Illinois, USA
Years made	1949 - 1958
Total built	22,016
Manufacturer	International Harvester

Transmission

Type	gear
Gears	6 forward and 2 reverse

Serial Numbers

1949	22536 (TDR)
1950	22837 (TDR)
1951	24668 (TDR)
1952	27245 (TDR)
1953	29201 (TDR)
1954	32089 (TDR)
1955	33650 (TD181)
1956	36101 (TD182)
1957	37882 (TD182)
1958	38805 (TD182)
Location	upper-left dash
Final 1955	33649 (TD181)
Final 1956	36100 (TD181)
Final 1958	38861 (TD182)