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International TD-25B-PS 1967
International TD-25B-PS, 1967
Model history
Model introduced 1962
Model discontinued 1973
Model status Discontinued
No. produced 2,257
Preceded by TD-25TC Series 250
Superseded by International TD-25C
Engine Specification
Engine make International
Engine model DT-817
Fuel type diesel
Power hp 230 net engine
Governed rpm 1600
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 power shift with torque converter and 2-speed power shift in tracks
Forward 4
Reverse 4
Drive crawler
General Data
Linkage Category drawbar
Tyre Sizes (std/options)
Front 22" tracks
Tractor Dimensions
Length (inches/metres) 200"
Width (inches/meters) 102"
Height (inches/meters) 101"
Weight (nominal) lb/kg 47000 lb
Wheelbase 80" gauge
Other info
Factories USA
Plow rating
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The International TD-25B-PS was a diesel engined crawler tractor built by the International Harvester company from 1962 to 1973 in the USA.

Model historyEdit

For Company history, see International Harvester.

For gear drive version see: International TD-25B

The International TD-25B-PS replaced the TD-25TC Series 250. The new model was fitted with a 2-speed power shift instead of the previous hand clutch and 2-speed constant mesh manual transmission. Combined with the 2-speed planetary power shift tracks this provided 4 power shifted speeds forward and reverse. The governed engine speed was increased to 1600 rpm, with no change in rated power. The 230 net hp 4-speed TD-25B-PS originally competed with the 225-hp 2-speed Allis-Chalmers HD-21 and the 235-hp 3-speed Caterpillar D-8H. However, in 1963 Allis-Chalmers replaced the HD-21 with the 268-hp HD-21P. In 1966 Caterpillar increased the power of the D-8H to 270 net hp and moved it out of the International's class also. Later, the 223-hp Fiat-Allis FD-20 and 220-hp Komatsu D-85E competed with the International. International kept the TD-25B-PS in production until 1973.

Timeline Edit

  • 1962 - TD-25B-PS replaced TD-25TC Series 250
  • 1973 - TD-25B-PS discontinued

Factory locations Edit

Specification Edit

See Infobox for basic details

  • Track frame: 7 rollers, 2 top idlers
  • Track gauge: 80"
  • Track shoe width: 22"

Variations and Options Edit

  • Optional track shoe width: 26"

Serial Numbers Information Edit

Year Serial no. run
start
Serial no. run
End
Number Built Notes
1962 1801 1939 139 Total calculated from serial range
1963 1940 2274 335
1964 2275 2792 518
1965 2793 3072 280
1966 3073 3390 318
1967 3391 3719 329
1968 3720 3890 171
1969 3891 4000 110
1970 4001 4019 19
1971 4020 4039 20
1972 4040 4057 18
1973 4058
Total built 2257 Not including 1973

Preservation Edit

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Gallery Edit

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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

External Links Edit

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