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International TD-6
International TD6
International TD-6 at antique tractor show, Tulare, California, 2006
Model history
Model introduced 1940
Model discontinued 1956
Model status Discontinued
No. produced 38,450 (includes T-6 and TD-6)
Preceded by New model
Superseded by International TD-6 Series 61
Engine Specification
Engine make International
Engine model D-248
Fuel type diesel
Power hp 35 belt, 28 drawbar
Governed rpm 1450
Displacement cu in /(litre) 248 ci
No. of Cylinders 4
Bore in (mm) 3.875 in
Stroke in (mm) 5.25 in
Cooling system water
Naturally aspirated, Turbo or Supercharged NA
Transmission Details
Transmission type sliding gear
Clutch Rockford single plate
Gearbox make International
Forward 5
Reverse 1
Drive crawler
General Data
Linkage Category drawbar
Tyre Sizes (std/options)
Front 16" tracks
Tractor Dimensions
Length (inches/metres) 104"
Width (inches/meters) 53"
Height (inches/meters) 59"
Weight (nominal) lb/kg 6800 lb
Turning circle (nominal) inches/meters 12 ft
Other info
Plow rating 3-4 14"
Nebraska Tests No. 345
Approximate Cost new in (year) $9410 (1956)
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The Edrob/International TD-6 was a diesel engined crawler tractor built by the International Harvester company from 1940 to 1956.

Model historyEdit

For Company history, see International Harvester.

The International TD-6 was a new small crawler for International Harvester, following the styling theme introduced earlier on the TD-18. The TD-6 diesel was identical to the gasoline-powered T-6 except for the engine. The 248 ci 4-cylinder diesel was very similar in basic design to the gasoline version, but strengthened to withstand the stresses of operation on diesel. Like all International diesels of the time, it started on gasoline.

In 1940 the TD-6 had a larger engine than the Caterpillar D-2 (248 ci vs. 221 ci) and developed somewhat more power. The TD-6 was a little less powerful than the Cletrac AD. In mid-1947 Caterpillar enlarged the engine of the D-2 to 251ci, making the D-2 slightly more powerful than the International TD-6. In 1951 International revised the TD-6 by increasing the compression ratio from 14.2 to 16.8. In Nebraska test no. 482 the revised tractor developed 38 belt and 32 drawbar horsepower. The TD-6 was now more powerful than the Cat D-2. In 1956 International came out with the still higher powered TD-6 Series 61.

Timeline Edit

  • 1940 - International TD-6 introducedTracTracTor|10-20 TracTracTor]]
  • 1951 - Compression ratio increased for more power
  • 1956 - TD-6 upgraded to become the International TD-6 Series 61

Factory locations Edit

Specification Edit

See Infobox for basic details

  • Track gauge: 40" or 50"
  • Track shoe width: 10" (1940); 12" (1944)

Variations and Options Edit

  • Wide-tread version
  • Optional track show width: 8", 12", 13", 14", 15", 16", 18", or 20"
  • Rubber track shoes
  • Orchard seat
  • Orchard fenders
  • Belt pulley
  • Pto
  • Electric lights and starting

Serial Numbers Information Edit

Year Serial no. run
start[1]
Serial no. run
End[1]
Number Built Notes
1940 501 4434 3934 Serial range includes T-6 and TD-6
1941 4435 8189 3755 Number built calculated
1942 8190 9296 1107
1943 9297 9580 284
1944 9581 10827 1247
1945 10828 12055 1228
1946 12056 14515 2460
1947 14516 17348 2833
1948 17349 21144 3796
1949 21145 24859 3715
1950 24860 27535 2676
1951 27536 31055 3520
1952 31056 33156 2101
1953 33157 35745 2589
1954 35746 37469 1724
1955 37470 38705 1236
1956 38706 38950 245
Total built 38450

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

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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

  • Please supply some relevant references or sources for information for verification of data.
  1. 1.0 1.1 Heartland Guides Division, Hot Line Antique Tractor Guide, Volume X, Heartland Communications Group, Inc., Fort Dodge, Iowa, 2010

External Links Edit

  • Add any suitable (& Relevant) web links here
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