McCormick-Deering
McCormick-Deering OS-4
The McCormick-Deering OS-4 is a farm tractor produced from 1944 to 1953 by McCormick-Deering in Rock Island, Illinois, USA. It is an orchard tractor variant without full sheet metal. Powered by an International Harvester 2.5L 4-cylinder gasoline engine, it features a 5-speed gear transmission with 1 reverse gear. The tractor offers 25 hp drawbar power and 27.5 hp belt power. It has a rear PTO type of 540 rpm. The OS-4 is a two-wheel drive tractor with manual steering and an open operator station. Dimensions include a wheelbase of 66.75 inches, length of 120.875 inches, width of 55.5 inches, and height of 57.125 inches, with a shipping weight of 4120 lbs. Tires are sized 5.50-16 front and 12-26 rear. The tractor includes a belt pulley with a diameter of 9.75 inches and width of 7.5 inches.
Power30 hp[B]
Founded1944 - 1953
ModelOS-4
Technical Specifications
Detailed specifications and technical data for McCormick-Deering OS-4
Power
| Belt (claimed) | 27.5 hp (20.5 kW) |
|---|---|
| Drawbar (claimed) | 25 hp (18.6 kW) |
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 |
| Air cleaner | oil bath |
| 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) |
| Coolant capacity | 17 qts (16.1 L) |
Variants
| O-4 | orchard |
|---|---|
| W-4 | standard |
| OS-4 | orchard, without full sheet metal |
Mechanical
| Drive | Two-wheel drive |
|---|---|
| Steering | Manual steering |
| Operator station | Open operator station |
Production
| Built in | Rock Island, Illinois, USA |
|---|---|
| Years made | 1944 - 1953 |
| Manufacturer | McCormick-Deering |
References
| Source | 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 |
| Oil capacity | 24 qts (22.7 L) |
Dimensions & Tires
| Width | 55.5 inches (140 cm) |
|---|---|
| Height | 57.125 inches (145 cm) |
| Length | 120.875 inches (307 cm) |
| Rear tire | 12-26 |
| Wheelbase | 66.75 inches (169 cm) |
| Front tire | 5.50-16 |
| Rear tread | 41.75 inches (106 cm) |
| Front tread | 45.875 inches (116 cm) |
| Shipping weight | 4120 lbs (1868 kg) |
| Clearance (front axle) | 15.125 inches (38 cm) |
Power Take-off (PTO)
| Rear PTO Type | 540 |
|---|
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