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International TD-25 1959
International TD-25 Series 250, 1959
Model history
Model introduced 1959
Model discontinued 1962
Model status Discontinued
No. produced 1,290 (including TD-25TC)
Preceded by TD-24 Series 241
Superseded by International TD-25B
Engine Specification
Engine make International
Engine model DT-817
Fuel type diesel
Power hp 230 net engine, 189 drawbar
Governed rpm 1500
Displacement cu in /(litre) 817 ci
No. of Cylinders 6
Bore in (mm) 5.375 in
Stroke in (mm) 6 in
Cooling system water
Naturally aspirated, Turbo or Supercharged turbocharged
Transmission Details
Transmission type 4-speed syncromesh with 2-speed planetary power shift in each track
Gearbox make International
Forward 8
Reverse 8
Drive crawler
General Data
Linkage Category drawbar
Tyre Sizes (std/options)
Front 24" tracks
Tractor Dimensions
Height (inches/meters) 97"
Weight (nominal) lb/kg 44850 lb
Wheelbase 80" gauge
Other info
Factories USA
Plow rating 20-14"
Nebraska Tests No. 752
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The International TD-25 Series 250 was a diesel engined crawler tractor built by the International Harvester company from 1959 to 1962 in the USA.

Model historyEdit

For Company history, see International Harvester.

For torque converter drive version see: International TD-25TC Series 250

The International TD-25 Series 250 was larger and more powerful than the TD-24 Series 241 it replaced. The engine was the brand new International DT-817 turbocharged 4-valve-per-cylinder 6-cylinder diesel. The gear drive version used the same 4-speed syncromesh transmission with 2-speed tracks as the TD-24. The 230 net hp 8-speed TD-25 Series 250 was very comparable to the 235-hp Caterpillar D-8H with 6-speed manual transmission.

Timeline Edit

  • 1959 - TD-25 Series 250 replaced TD-24 Series 241
  • 1962 - TD-25B replaced TD-25 Series 250

Factory locations Edit

Specification Edit

See Infobox for basic details

  • Track frame: 7 rollers, 2 top idlers
  • Track gauge: 80"
  • Track shoe width: 24"

Variations and Options Edit

Serial Numbers Information Edit

Year Serial no. run
start
Serial no. run
End
Number Built Notes
1959 501 608 108 Total calculated from serial range
1960 609
1961 5001 5260 260
1962 5261 5400 140
Total built 1290[1] Includes TD-25TC Series 250

Preservation Edit

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

Do you know of any examples to list ?

Gallery Edit

Add extra photos here please.

See also Edit

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 Edit

  1. Klancher, Lee, International Harvester Photographic History, Motorbooks International, Osceola, Wisconsin, 1996

External Links Edit

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