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International TD24 1948.jpg
International TD-24 1948
Model history
Model introduced 1947
Model discontinued 1955
Model status Discontinued
No. produced 7,500
Preceded by Model 15 TracTracTor
Superseded by International T-6
Engine Specification
Engine make International
Engine model D-24
Fuel type diesel
Power hp 180 net engine, 167 belt, 142 drawbar
Governed rpm 1375
Displacement cu in /(litre) 1091 ci
No. of Cylinders 6
Bore in (mm) 5.75 in
Stroke in (mm) 7 in
Cooling system water
Naturally aspirated, Turbo or Supercharged NA
Transmission Details
Transmission type 4-speed syncromesh, with 2-speed planetary power shift in each track
Clutch Rockford dual-plate dry disk
Gearbox make International
Forward 8
Reverse 8
Drive crawler
General Data
Linkage Category drawbar
Tyre Sizes (std/options)
Front 22" tracks
Tractor Dimensions
Length (inches/metres) 183"
Width (inches/meters) 102"
Height (inches/meters) 88"
Weight (nominal) lb/kg 37500 lb
Turning circle (nominal) inches/meters 20 ft
Other info
Factories USA
Plow rating
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The International TD-24 was a diesel engined crawler tractor built by the International Harvester company from 1947 to 1955 in the USA.

Model history

For Company history, see International Harvester.

The giant TD-24 was the new flagship for International’s crawler line. It weighed about 20 tons (with dozer blade) and was powered by a new 180 hp (130 kW) 1091ci 6-cylinder diesel. The transmission and steering design was unique. The main transmission was a 4-speed syncromesh (for on-the-go shifting), and it had a separate forward and reverse unit for fast cycling in dozer work. There were also power-shifted 2-speed planetary gears in each track that made up the Planet Power Steering system. The planetary gears were controlled by the steering levers. Combining the high and low range of the planetary gears with the main transmission provided a total of 8 forward (and 8 reverse) speeds. Putting one track in high range and one in low caused a gentle turn with power to both tracks. For sharper turns the pivot brakes disconnected the inside track, as with a normal crawler.

When International brought out the TD-24 its main target was the legendary Caterpillar D8. The TD-24 was slightly larger, considerably more powerful, and much more modern with its syncromesh transmission and planetary power steering. The TD-24 also competed with the less powerful Allis-Chalmers HD-19 and later HD-20, both of which had the advantage of torque converter drive. The Cletrac FDE and its successor the Oliver OC-18 were both quite a bit smaller than the other tractors mentioned.


  • 1947 - International TD-24 introduced
  • 1955 - TD-24 upgraded to Series 241

Factory locations


See Infobox for basic details

  • Track gauge: 80"
  • Track shoe width: 22" (1947)
  • Electric starting

Variations and Options

  • Extended track frame
  • Optional track shoe width: 18"-28"
  • Radiator guard
  • Electric lights

Serial Numbers Information

Year Serial no. run
Serial no. run
Number Built[2] Notes
1947 TDE506 514 5
1948 515 1500 311
1949 1501 1966 349
1950 1967 2914 857
1951 2915 4119 1061
1952 4120 5074 925
1953 5075 6048 974 Total built this year calculated from serial range
1954 6049 6555 507 Total built this year calculated from serial range
1955 6556
Total built 7500[3]

Note: Total built and serial number ranges from different sources (even IH records) do not always agree


No information on any individual examples of these tractors in preservation is currently available on here.

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See also

Collection related info
  • Shows and Meets - events featuring tractors and other machinery
  • Clubs Listing - List of clubs including various tractor marques
  • Collections - list of private collections with tractors (add yours)
  • Museums - includes museums featuring tractors (please add missing ones)

References / Sources

  2. Wendel, C. H., 150 Years of International Harvester, Crestline Publishing, Sarasota, Florida, 1981
  3. Klancher, Lee, International Harvester Photographic History, Motorbooks International, Osceola, Wisconsin, 1996

External Links