McCormick-Deering WD-40 Specs ( 1935-1940 )
Overview
The McCormick-Deering WD-40 is a standard-tread farm tractor produced between 1935 and 1940 in Milwaukee, Wisconsin. This model is equipped with a 7.6L 4-cylinder diesel engine and a 3-speed gear transmission, weighing approximately 7,550 lbs in a 2WD configuration. Official testing recorded a maximum of 48.79 belt horsepower and a drawbar pull capacity of 4,774 lbs.
Ideal Applications
Tested Power and Efficiency:
According to Nebraska Tractor Test 246, the unit delivers a maximum of 48.79 hp at the belt and 37.21 hp at the drawbar while consuming 3.4 gallons of fuel per hour at max load.
Plowing and Field Traction:
The tractor is rated for four 14-inch plows and utilizes steel wheels, with 34x6 front tires and 50x12 rear tires, to manage a maximum tested pull of 4,774 lbs in first gear.
Engine and Starting Mechanism:
The 460.7 cubic inch liquid-cooled diesel engine features a 17:1 compression ratio and a hand-cranked gasoline-ignition starting system supported by a 1.25-gallon auxiliary fuel tank.
Production
| Description | Standard-tread tractor / Built in Milwaukee, Wisconsin, USA |
|---|---|
| Manufacturer | McCormick-Deering (a part of International Harvester) |
Engine
| Aux. fuel | 1.25 gal (4.7 L) |
|---|---|
| Engine type | International Harvester 7.6L 4-cyl diesel |
| Fuel tank | 31 gal (117.3 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 4.75x6.50 inches (121 x 165 mm) |
| Compression | 17:1 |
| Coolant capacity | 56 qts (53.0 L) |
| Description | International Harvester / diesel / 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.))-valve / liquid-cooled vertical I-head |
| Displacement | 460.7 ci (7.6 L) |
| Rated RPM | 1100 |
| Starter type | hand-cranked gasoline-ignition |
| Belt (claimed) | 44 hp (32.8 kW) |
| Belt (tested) | 48.79 hp (36.4 kW) |
| Drawbar (claimed) | 28 hp (20.9 kW) |
| Drawbar (tested) | 37.21 hp (27.7 kW) |
| Plows | 4 (14-inch) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 3 forward and 1 reverse |
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
| Final drives | spur gear |
Dimensions & Tires
| Height | 67 inches (170 cm) |
|---|---|
| Length | 141.5 inches (359 cm) |
| Weight | 7,550 lbs (3424 kg) |
| Width | 65.5 inches (166 cm) |
| Front tire | 34x6 |
| Rear tire | 50x12 |
| Weight | 7,550 lbs (3424 kg) |
| Ag front | 34x6 steel |
| Ag rear | 50x12 steel |
Belt Pulley
| Diameter | 16.75 inches (42 cm) |
|---|---|
| RPM | 588 |
| Speed | 2580 ft/min (786.38 meters/min) |
| Width | 9 inches (22 cm) |
Nebraska Tractor Test 246
| Belt fuel use (max) | 3.4 gal/hour (12.9 l/hour) |
|---|---|
| Belt power (max) | 48.79 hp (36.4 kW) |
| Description | Diesel 3-speed 2WDSeptember 23 - 27, 1935Link: Nebraska Tractor Test 246 file / Drawbar performance / Gear 1 used for power test. / Gear 1 used for pull test. |
| Max power | 37.21 hp (27.7 kW) |
| Max pull | 4,774 lbs (2165 kg) |
References
| Description | International Tractors - The Line That Offers You A Choice published in 1933, by International Harvester |
|---|
Variants
| WA-40 | gasoline |
|---|---|
| WD-40 | diesel |
| WK-40 | kerosene |