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International TD-9
International TD-9 1951
International TD-9 wide gauge 1951
Model history
Model introduced 1940
Model discontinued 1956
Model status Discontinued
No. produced 48,880
Preceded by McCormick-Deering TD-35
Superseded by International TD-9 Series 91
Engine Specification
Engine make International
Engine model D-335
Fuel type diesel
Power hp 47 belt, 39 drawbar
Governed rpm 1400
Displacement cu in /(litre) 335 ci
No. of Cylinders 4
Bore in (mm) 4.4 in
Stroke in (mm) 5.5 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) 114"
Width (inches/meters) 75"
Height (inches/meters) 56"
Weight (nominal) lb/kg 10260 lb
Turning circle (nominal) inches/meters 14 ft
Wheelbase 60" gauge
Other info
Factories Tractor Works, Chicago, Illinois
Plow rating 4-6 14"
Nebraska Tests No. 445
Approximate Cost new in (year) $10380 (1956)
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The Edrob/International TD-9 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-9 crawler replaced the unstyled McCormick-Deering TD-35. The TD-9 used a diesel version of the 335 ci 4-cylinder of the T-9 instead of the 414 ci diesel of the TD-35. When it introduced the TD-9, International was trying to compete with the Caterpillar D-4 and so it designed a very similar tractor. Both tractors were the same size and powered by 4-cylinder diesel engines running at 1,400 rpm with 5-speed transmissions. Caterpillar used its pony motor starting system while the International started on gasoline and then switched to diesel. The basic International was crank started with an electric starter optional. The TD-9 and the other early International crawlers had engine side screens with horizontal silver stripes, matching three silver grille bars dividing sections of red cross bars.

In 1940 the TD-9 had a slightly larger engine than the D4, 335 ci vs. 312 ci, and developed slightly more power, 44 vs. 40 belt hp. The only other tractor in this class was the Cletrac BD-6, which developed 46 belt hp from a 298 ci 6-cylinder Hercules diesel running at 1,400 rpm. The Cletrac had only a 3-speed transmission.

In 1947 Allis-Chalmers brought out its new HD-5, the most powerful tractor to date in this class with 48 belt hp. Caterpillar increased the engine size of the D-4 to 350 ci, boosting it to 48 belt hp. International responded in 1951 with a small upgrade to the TD-9 that developed 47 belt hp. About the same time the tractor lost its engine side screens and silver bars in the grille.

In 1955 Caterpillar went to 59 hp, Oliver to 57, and Allis-Chalmers to 61. Clearly the TD-9 was falling behind its competition so, in 1956, International brought out the revised International TD-9 Series 91 .

Timeline Edit

  • 1940 - International TD-9 replaced the McCormick-Deering TD-35
  • 1951 - TD-9 power increased
  • 1956 - TD-9 Series 91 replaced the original TD-9

Factory locations Edit

Specification Edit

See Infobox for basic details

  • Track gauge: 44" or 60"
  • Track shoe width: 13"

Variations and Options Edit

  • Wide-guage version
  • Optional track show widths: 8", 10", 12", 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 TCB501 2173 1673 Serial range includes T-9 and TD-9
1941 2174 4173 2000 Number built calculated
1942 4174 8663 4490
1943 8664 11911 3248
1944 11912 18249 6338
1945 18250 23690 5441
1946 23691 26289 2599
1947 26290 29511 3222
1948 29512 32972 3461
1949 32973 36926 3954
1950 36927 40397 3471
1951 40398 44709 4312
1952 44710 47848 3139
1953 47849 52599 4751
1954 52600 56207 3608
1955 56208 58818 2611
1956 58819 60300 1482
Total built 48880 Total serial range minus T-9 production

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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