International TD-24 1948
|Preceded by||Model 15 TracTracTor|
|Superseded by||International T-6|
|Power hp||180 net engine, 167 belt, 142 drawbar|
|Displacement cu in /(litre)||1091 ci|
|No. of Cylinders||6|
|Bore in (mm)||5.75 in|
|Stroke in (mm)||7 in|
|Naturally aspirated, Turbo or Supercharged||NA|
|Transmission type||4-speed syncromesh, with 2-speed planetary power shift in each track|
|Clutch||Rockford dual-plate dry disk|
|Tyre Sizes (std/options)|
|Weight (nominal) lb/kg||37500 lb|
|Turning circle (nominal) inches/meters||20 ft|
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
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
|1953||5075||6048||974||Total built this year calculated from serial range|
|1954||6049||6555||507||Total built this year calculated from serial range|
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.
- Do you know of any examples to list ?
- Example with front winch for bulldozer gear in the S.E. Davis & Son collection
- Example with Bucyrus-Erie Bulldozer blade and rear CCU at Fred Knights
Add extra photos here please.
- 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
- Wendel, C. H., 150 Years of International Harvester, Crestline Publishing, Sarasota, Florida, 1981
- Klancher, Lee, International Harvester Photographic History, Motorbooks International, Osceola, Wisconsin, 1996