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International TD-25B 1963
International TD-25B, 1963
Model history
Model introduced 1962
Model discontinued 1972
Model status Discontinued
No. produced 840
Preceded by TD-25 Series 250
Superseded by International TD-25C
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 22" tracks
Tractor Dimensions
Length (inches/metres) 200"
Width (inches/meters) 102"
Height (inches/meters) 101"
Weight (nominal) lb/kg 46640 lb
Wheelbase 80" gauge
Other info
Factories USA
Plow rating 20-14"
Approximate Cost new in (year) $63035 (1971)
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The International TD-25B was a diesel engined crawler tractor built by the International Harvester company from 1962 to 1972 in the USA.

Model historyEdit

For Company history, see International Harvester.

For power shift version see: International TD-25B-PS

The International TD-25B replaced the TD-25 Series 250. The new model was about one ton heavier but used the same engine and transmission as the previous version. In 1965 the governed engine speed was increased from 1500 to 1600 rpm, with no change in rated power. The 230 net hp 8-speed TD-25B originally competed with the 235-hp 6-speed Caterpillar D-8H. In 1966 Caterpillar increased the power of the D-8H to 270 net hp and moved it out of the International's class. International kept the TD-25B in production until 1972.

Timeline Edit

  • 1962 - TD-25B replaced TD-25 Series 250
  • 1965 - Engine rpm increased to 1600
  • 1972 - TD-25B 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 5401 5481 81 Total calculated from serial range
1963 5482 5570 89
1964 5571 5611 41
1965 5612 5774 263
1966 5775 5890 116
1967 5891 6000 110
1968 6001 6028 28
1969 6029 6070 42
1970 6071 6095 25
1971 6096 6140 45
1972 6141
Total built 840 Not including 1972

Preservation Edit

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Gallery Edit

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See also Edit

Collection related info
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References / Sources Edit

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