International TD-9 Series 91 1956
International TD-9 Series 91 1956
Model history
Model introduced 1956
Model discontinued 1959
Model status Discontinued
No. produced 6,990
Preceded by TD-9
Superseded by TD-9 Series 92
Engine Specification
Engine make International
Engine model D-350
Fuel type diesel
Power hp 66 net, 63 belt, 53 drawbar
Governed rpm 1550
Displacement cu in /(litre) 350 ci
No. of Cylinders 4
Bore in (mm) 4.5"
Stroke in (mm) 5.5"
Cooling system water
Naturally aspirated, Turbo or Supercharged NA
Transmission Details
Transmission type sliding gear
Gearbox make International
Forward 5
Reverse 1
Drive crawler
General Data
Linkage Category drawbar
Tyre Sizes (std/options)
Front 13" tracks
Tractor Dimensions
Length (inches/metres) 116"
Width (inches/meters) 75"
Height (inches/meters) 74"
Weight (nominal) lb/kg 11670 lb
Wheelbase 60" gauge
Other info
Factories USA
Plow rating 6-14"
Nebraska Tests No. 586
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The International TD-9 Series 91 was a diesel engined crawler tractor built by the International Harvester company from 1956 to 1959 in the USA.

Model historyEdit

For Company history, see International Harvester.

The International TD-9 Series 91 used the same basic chassis as the previous International TD-9, but with a larger engine and new styling. The tractor received the same vertical-bar grille as the International TD-6 Series 61. The engine was enlarged from 335 ci to 350 ci displacement and the governed rpm was increased from 1400 to 1550 rpm, boosting the power output to 63 belt hp.

Timeline Edit

  • 1956 - TD-9 Series 91 with larger engine replaced the original TD-9
  • 1959 - 6-cylinder TD-9 Series 92 replaced Series 91 and also the colour was changed from Red to Yellow in 1956 and onwards.

Factory locations Edit

Specification Edit

See Infobox for basic details

  • Track gauge: 60"
  • Track frame: 5 rollers, 2 idlers
  • Track shoe width: 13"
  • 350 ci 4-cylinder diesel engine
  • 5-speed transmission
  • Drawbar
  • Electric starting and lighting

Variations and Options Edit

  • Optional track shoe width: up to 18"
  • Rubber track shoes
  • Belt pulley
  • Pto
  • Hydraulic system

Serial Numbers Information Edit

Year Serial no. run
Serial no. run
Number Built Notes
1956 TD9-60301 63945 3645
1957 63946 65801 1856
1958 65802 67289 1488
1959 67290
Total built 6990[2]

Preservation Edit

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

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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

  1. Heartland Guides Division, Hot Line Antique Tractor Guide, Volume X, Heartland Communications Group, Inc., Fort Dodge, Iowa, 2010
  2. Klancher, Lee, International Harvester Photographic History, Motorbooks International, Osceola, Wisconsin, 1996

External Links Edit

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