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McCormick-Deering WD-40

McCormick-Deering WD-40 tractor
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The McCormick-Deering WD-40 is a standard-tread farm tractor produced from 1935 to 1940 by McCormick-Deering, a part of International Harvester. It was built in Milwaukee, Wisconsin, USA. The WD-40 is a diesel variant in the WD-40 series, featuring an International Harvester 7.6L 4-cylinder diesel engine with 48.9 hp estimated engine power. It has a 3-speed gear transmission with dry disc clutch, two-wheel drive with spur gear final drives, and manual steering. The tractor weighs 7,550 lbs and rides on 34x6 front and 50x12 rear steel tires. It delivers a tested drawbar power of 37.21 hp and belt power of 48.79 hp, capable of pulling 4 14-inch plows. The belt pulley diameter is 16.75 inches with a speed of 2580 ft/min. The WD-40 was designed for farm use with an open operator station.
McCormick-Deering WD-40tractorfarm tractordiesel tractorInternational Harvester7.6L engine3-speed transmissiontractor specs
Power48 hp[B]
Founded1935 - 1940
ModelWD-40

Technical Specifications

Detailed specifications and technical data for McCormick-Deering WD-40

Power

Plows:4 (14-inch)
Belt (tested):48.79 hp (36.4 kW)
Belt (claimed):44 hp (32.8 kW)
Drawbar (tested):37.21 hp (27.7 kW)
Drawbar (claimed):28 hp (20.9 kW)

Tires

Ag rear:50x12 steel
Ag front:34x6 steel

Engine

Type:diesel
Cooling:liquid-cooled vertical I-head
Aux. fuel:1.25 gal (4.7 L)
Cylinders:4-cylinder 8-valve (The WD-40 engine has twelve total valves. The four intake valves on the gasoline start manifold are blocked off during diesel operation.)
Fuel tank:31 gal (117.3 L)
Rated RPM:1100
Air cleaner:oil bath
Bore/Stroke:4.75x6.50 inches (121 x 165 mm)
Compression:17:1
Displacement:460.7 ci (7.6 L)
Manufacturer:International Harvester
Starter type:hand-cranked gasoline-ignition
Coolant capacity:56 qts (53.0 L)

Variants

WA-40:gasoline
WD-40:diesel
WK-40:kerosene

Dimensions

Width:65.5 inches (166 cm)
Height:67 inches (170 cm)
Length:141.5 inches (359 cm)
Weight:7,550 lbs (3424 kg)

Mechanical

Drive:Two-wheel drive
Steering:Manual steering
Final drives:spur gear
Operator station:Open operator station

Production

Type:Standard-tread tractor
Built in:Milwaukee, Wisconsin, USA
Years made:1935 - 1940

Belt Pulley

RPM:588
Speed:2580 ft/min (786.38 meters/min)
Width:9 inches (22 cm)
Diameter:16.75 inches (42 cm)

Transmission

Type:gear
Gears:3 forward and 1 reverse
Clutch:dry disc

Related Models

McCormick-Deering 22-36

Model:22-36