For Gasoline (Petrol) engined version, see McCormick-Deering W-6.
McCormick WD-6 1947
McCormick WD-6 Standard, photo of restored tractor at tractor show
Model history
Model introduced 1940
Model discontinued 1953
Model status Discontinued
No. produced ?
Preceded by New model
Superseded by McCormick Super WD-6
Engine Specification
Engine make International
Engine model D-248
Fuel type diesel
Power hp 35 belt, 31 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
Gearbox make International
Forward 5
Reverse 1
Drive 2-WD
General Data
Linkage Category drawbar
Tyre Sizes (std/options)
Front 6.50-16 6-ply
Rear 14-30 6-ply
Tractor Dimensions
Length (inches/metres) 124 in
Width (inches/meters) 69 in
Height (inches/meters) 70 in
Weight (nominal) lb/kg 5030 lb
Turning circle (nominal) inches/meters 25.5 ft
Wheelbase 76 in
Other info
Factories Rock Island, Illinois, USA
Plow rating 3-14"
Nebraska Tests No. 356
Approximate Cost new in (year) $1587 (1940), $3124 (1951)
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The McCormick-Deering WD-6 was a standard tread Diesel engined tractor built by the International Harvester company from 1940 to 1953 in Rock Island, Illinois, USA. It was also made as a gasoline engined model the McCormick-Deering W-6

Model historyEdit

For Company history see
Main article: International Harvester

The McCormick-Deering WD-6 was the same as the W-6 except for its diesel engine, taken without change from the Farmall MD. The 248 ci diesel used the same block as the gasoline engine but was strengthened with a 5-main bearing crankshaft instead of 3. The diesel engine used International's well-known gasoline atarting method.

Timeline Edit

  • 1940 - McCormick-Deering W-6 gasoline-powered standard-tread tractor replaced the W-30
  • 1940 - WD-6 diesel version added
  • 1946 - brand name shortened from McCormick-Deering to McCormick
  • 1952 - WD-6 replaced by McCormick Super WD-6

Factory locations Edit

  • Farmall Works, Rock Island, Illinois, USA

Specification Edit

See Infobox for basic details

  • Standard tires
    • Front: 22.5"x4" steel (1941); 6.00-16 4-ply (1948)
    • Rear: 42"x10" steel (1941); 13-30 6-ply (1948); 14-30 6-ply (1951)

Variations and Options Edit

  • Optional tires
    • Front: 6.00-16 or 6.50-16 4 or 6-ply (1941); 7.50-16 6-ply (1951)
    • Rear: 12.75-24 or 13.50-24 6-ply (1941); 12-30, 13-30, or 14-30 6-ply (1946); 15-30 6-ply (1951)

Serial Numbers Information Edit

Year Serial no. run
Serial no. run
Number Built Notes
1940 WDBK501 1224 Serial range includes W-6, WD-6, O-6, OS-6, ODS-6, I-6, ID-6
1941 1225 3717 Number built included with W-6
1942 3718 5056
1943 5057 6312
1944 6313 9495
1945 9496 14152
1946 14153 17791
1947 17792 22980
1948 22981 28703
1949 28704 33697
1950 33698 38517
1951 38518 44317
1952 44318 45273
1953 45274 46011[2]
Total built


A number of examples of this model can be seen in museums and at tractor Shows and Meets in America and the UK.

List of Preserved McCormick-Deering W-6 series 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
Image needed LHB

Image needed LHB

Please add any tractor with known reg or serial no. with Photo if possible.
Create a page (link) for an individual tractor by linking the reg or serial number using reg number or serial number in the relevant column. Then once saved click the red link to start the new page and add info on that tractor.

Gallery Edit

Add extra photos here please.

IH McCormick W6 super diesel-P8100546 Add your photo here
A later McCormick Super WD-6 fitted with an aftermarket Hydraulic pump driven off the engine. add a caption here

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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