Tractor · 1935Unverified
McCormick-Deering WD-40
McCormick-Deering WD-40 — Standard-tread tractor · 28 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
28 hp
Max power
27.7 kW
Weight
3424 kg
Hover a source tag to verify
Overview
ManufacturerMcCormick-Deering (a part of International Harvester)Reference
Standard-tread tractorReference
Built in Milwaukee, Wisconsin, USAReference
Two-wheel driveReference
Final drivesspur gearReference
Manual steeringReference
Open operator stationReference
Variants
WA-40gasolineReference
WK-40keroseneReference
WD-40dieselReference
Engine
International Harvester 7.6L 4-cyl dieselReference
Fuel tank117.3 LReference
Aux. fuel4.7 LReference
Drawbar (claimed)20.9 kWReference
Belt (claimed)32.8 kWReference
Plows4 (14-inch)Reference
Drawbar (tested)27.7 kWReference
Belt (tested)36.4 kWReference
International HarvesterReference
dieselReference
4-cylinder 8 ((The WD-40 engine has twelve total valves. The four intake valves on the gasoline start manifold are blocked off during diesel operation.))-valveReference
liquid-cooled vertical I-headReference
Displacement7.6 LReference
Bore/Stroke121 x 165 mmReference
Air cleaneroil bathReference
Compression17:1Reference
Rated RPM1100Reference
Starter typehand-cranked gasoline-ignitionReference
Coolant capacity53.0 LReference
Belt power (max)36.4 kWReference
Max power27.7 kWReference
Transmission
3-speed gearReference
TypegearReference
Gears3 forward and 1 reverseReference
Clutchdry discReference
Dimensions
Weight3424 kgReference
Front tire34x6Reference
Rear tire50x12Reference
Ag front34x6 steelReference
Ag rear50x12 steelReference
Length359 cmReference
Width166 cmReference
Height170 cmReference
Capacities
Diameter42 cmReference
Width22 cmReference
RPM588Reference
Speed786.38 meters/minReference
Test results
Diesel 3-speed 2WDSeptember 23 - 27, 1935Link: Nebraska Tractor Test 246 fileReference
Belt fuel use (max)12.9 l/hourReference
Drawbar performanceReference
Gear 1 used for power test.Reference
Max pull2165 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.