McCormick-Deering OS-4
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McCormick-Deering OS-4 Orchard
Model history
Model introduced 1944
Model discontinued 1953
Model status Discontinued
Preceded by 10-20 Orchard
Engine Specification
Engine make International
Engine model C-152
Fuel type gasoline
Power hp 24 belt, 21 drawbar
Governed rpm 1650
Displacement cu in /(litre) 152 ci
No. of Cylinders 4
Bore in (mm) 3.375 in
Stroke in (mm) 4.25 in
Cooling system Water
Naturally aspirated, Turbo or Supercharged na
Transmission Details
Transmission type sliding gear
Clutch Rockford single dry disc
Gearbox make International
Forward 5
Reverse 1
Drive 2-WD
General Data
Linkage Category drawbar
Tyre Sizes (std/options)
Front 6.00-16 4-ply
Rear 13-26 6-ply
Tractor Dimensions
Length (inches/metres) 121 in
Width (inches/meters) 56 in
Height (inches/meters) 56 in
Weight (nominal) lb/kg 3825 lb
Turning circle (nominal) inches/meters 22 ft
Wheelbase 67 in
Other info
Factories Rock Island, Illinois, USA
Plow rating 2-14"
Nebraska Tests No. 353
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The McCormick-Deering OS-4 was built by International Harvester from 1944 to 1953 in Rock Island, Illinois, USA.

Model History Edit

For Company history see
Main article: International Harvester

The McCormick-Deering OS-4 orchard tractor was very very similar to the McCormick-Deering W-4 standard. The tractor was built narrower to fit more easily between rows of trees. The air intake and exhaust were lowered to give a completely smooth hood. Optional headlights were mounted below the radiator. The seat and controls were mounted lower and farther to the rear. The OS-4 replaced the McCormick-Deering 10-20 Orchard. The OS-4, brought out in 1944, was basically an O-4 without the wheel and cowl shielding.

Timeline Edit

Factory locations Edit

  • Farmall Works, Rock Island, Illinois, USA

Specification Edit

See Infobox for basic details

  • Standard tires
    • Front: 5.50-16 4-ply (1944)
    • Rear: 11.25-24 4-ply (1944); 11-26 4-ply (1946); 12-26 6-ply (1948); 13-26 6-ply (1951)

Variations and Options Edit

  • Optional tires
    • Front: 5.50-16 6-ply, 6.00-16 4 or 6-ply (1944); 6.50-16 4-ply (1952)
    • Rear: 11.25-24 or 12.75-24 6-ply (1944); 12-26 or 13-26 6-ply (1946)

Serial Numbers Information Edit

Year Serial no. run
Serial no. run
Number Built Notes
1944 OBHS11170 11170 Serial range includes W-4, O-4, OS-4, I-4
1945 11171 13933 Number built included with W-4
1946 13934 16021
1947 16022 18879
1948 18880 21911
1949 21912 24469
1950 24470 28166
1951 28167 31213
1952 31214 33066
1953 33067 33753[2]
Total built


List of Preserved McCormick-Deering W-4, O-4 and I-4 tractors
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Make + Model No.
Reg No.
(if known)
Serial No. Build-Date Engine-Type/Make Owner
(if known)
Photo Were seen/Featured in Other info
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Please add any tractor with known reg or serial no. with Photo if possible.
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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. 1.0 1.1 Wendel, C. H., 150 Years of International Harvester, Crestline Publishing, Sarasota, Florida, 1981
  2. Baumheckel, Ralph and Borghoff, Kent, International Farm Equipment Product History, American Society of Agricultural Engineers, St. Joseph, Michigan, 1997

External Links Edit

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