Tractor · 1940Unverified
McCormick-Deering WD-6
McCormick-Deering WD-6 — Standard-tread tractor · 31 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
31 hp
Max power
23.1 kW
Weight
1973 kg
Hover a source tag to verify
Overview
ManufacturerMcCormick-Deering (a part of International Harvester)Reference
Standard-tread tractorReference
Built in Rock Island, Illinois, USAReference
Two-wheel driveReference
Manual steeringReference
Open operator station.Reference
Variants
ID-6industrialReference
MDrow-cropReference
W-6gasoline engineReference
Engine
International Harvester 4.1L 4-cyl dieselReference
Fuel tank79.5 LReference
Aux. fuel3.3 LReference
Drawbar (claimed)23.4 kWReference
Belt (claimed)27.1 kWReference
Drawbar (tested)23.1 kWReference
Belt (tested)25.9 kWReference
International HarvesterReference
dieselReference
4-cylinderReference
liquid-cooled vertical I-headReference
Displacement4.1 LReference
Bore/Stroke98 x 133 mmReference
Compression14.2:1Reference
Rated RPM1450Reference
Firing order1-3-4-2Reference
Coolant capacity25.6 LReference
Belt power (max)25.9 kWReference
Max power23.1 kWReference
Transmission
5-speed gearReference
TypegearReference
Gears5 forward and 1 reverseReference
Clutch279.4mm mechanical dry discReference
PTO & Hydraulics
Rear PTOtransmissionReference
Rear PTO Type540Reference
Dimensions
Wheelbase193 cmReference
Weight1973 kgReference
Front tire22.50-4Reference
Rear tire42-10Reference
Ag front22.50-4 (steel)Reference
Ag rear42-10 (steel)Reference
Ag front6.50x16Reference
Ag rear13.5x24Reference
Length315 cmReference
Width160 cmReference
Height228 cmReference
Height (hood)149 cmReference
Shipping weight1973 kgReference
Front tread118 cmReference
Rear tread134 cmReference
WD-6 Serial Numbers
Location:Serial number plate located on the clutch housing.Reference
1940WDBK 516Reference
1941WDBK 1225Reference
1942WDBK 3718Reference
1943----Reference
1944WDBK 6371Reference
1945WDBK 9509Reference
1946WDBK 14019Reference
1947WDBK 16811Reference
1948WDBK 24020Reference
1949WDBK 28906Reference
1950WDBK 35566Reference
1951WDBK 39443Reference
1952WDBK 45175Reference
FAQ: How to read a serial number table.Reference
Capacities
Diameter27 cmReference
Width19 cmReference
RPM899Reference
Speed788.82 meters/minReference
Test results
Diesel 5-speed 2WDSeptember 20 - 27, 1940Link: Nebraska Tractor Test 356 fileReference
Belt fuel use (max)8.7 l/hourReference
Drawbar performanceReference
Gear 3 used for power test.Reference
Max pull2180 kgReference
Gear 1 used for pull test.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.