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McCormick-Deering O-4

McCormick-Deering O-4 tractor
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The McCormick-Deering O-4 is an orchard/vineyard tractor produced from 1940 to 1953 by McCormick-Deering in Rock Island, Illinois, USA. A total of 2,721 units were built. It features a 2.5L 4-cylinder gasoline engine by International Harvester, with a 5-speed gear transmission and two-wheel drive. The tractor has an open operator station and manual steering. It is equipped with a rear PTO type 540 and belt pulley with a diameter of 9.75 inches. The O-4 variant is designed specifically for orchard use, with related variants including the W-4 standard and OS-4 orchard without full sheet metal. Dimensions include a wheelbase of 66.75 inches, length of 120.9 inches, width and height of 60.25 inches, and a shipping weight of 4320 lbs. Tires are sized 5.50-16 front and 12-26 rear. The tractor is known for its reliability and suitability for orchard and vineyard farming.
McCormick-Deering O-4tractororchard tractorvineyard tractor2.5L engine5-speed transmissiontractor specifications
Power30 hp[B]
Founded1940 - 1953
ModelO-4

Technical Specifications

Detailed specifications and technical data for McCormick-Deering O-4

Power

Gasoline:27.5 hp (20.5 kW)
Belt (claimed):24 hp (kerosene) (17.9 kW)

Tires

Rear tire:12-26
Front tire:5.50-16

Engine

Type:International Harvester 2.5L 4-cyl gasoline
Aux. fuel:0.75 gal (2.8 L)
Fuel tank:17.5 gal (66.2 L)
Rated RPM:1650
Bore/Stroke:3.375x4.45 inches (86 x 113 mm)
Compression:5.9:1 (high-compression gasoline), 4.75:1 (gasoline-distillate), 4.5:1 (kerosene)
Displacement:152.1 ci (2.5 L)
Firing order:1-3-4-2
Oil capacity:6 qts (5.7 L)

Variants

O-4:orchard
W-4:standard
OS-4:orchard, without full sheet metal

Dimensions

Width:60.25 inches (153 cm)
Height:60.25 inches (153 cm)
Length:120.9 inches (307 cm)
Wheelbase:66.75 inches (169 cm)
Shipping weight:4320 lbs (1959 kg)

Mechanical

Drive:Two-wheel drive
Steering:Manual steering
Operator station:Open operator station

Production

Type:Orchard/Vineyard tractor
Built in:Rock Island, Illinois, USA
Total built:2,721
Years produced:1940 - 1953

References

General Line Catalog:published in 1949, by International Harvester

Belt Pulley

RPM:1019
Speed:2601 ft/min (792.78 meters/min)
Width:7.5 inches (19 cm)
Diameter:9.75 inches (24 cm)

Transmission

Type:gear
Gears:5 forward and 1 reverse

Serial Numbers

1940:OBH501
1941:OBH943
1942:OBH4056
1943:OBH5693
1944:OBH7593
1945:OBH11171
1946:OBH13934
1947:OBH16022
1948:OBH18880
1949:OBH21912
1950:OBH24470
1951:OBH28167
1952:OBH31214
1953:OBH33067
Location:Left side of tractor, on clutch housing

Power Take-off (PTO)

Rear PTO Type:540