McCormick-Deering OS-4 Specs ( 1944-1953 )
Overview
The McCormick-Deering OS-4 is a versatile 2.5L 4-cylinder gasoline farm tractor produced in Rock Island, Illinois between 1944 and 1953. Featuring a five-speed gear transmission and an open operator station, this two-wheel drive model delivers a claimed 27.5 hp at the belt and 25 hp at the drawbar.
Ideal Applications
Orchard and Specialized Farming:
The OS-4 variant is specifically designed for orchard environments without full sheet metal, offering a compact 55.5-inch width and 15.125-inch front axle clearance for navigating tight spaces.
Stationary Belt Work:
Equipped with a 9.75-inch diameter belt pulley operating at 1019 RPM, this tractor is capable of driving belt-powered machinery with a claimed 27.5 hp output.
General Field Operations:
With a 5-speed gear transmission and a 540 RPM rear PTO, the OS-4 supports a variety of implement speeds for standard agricultural tasks across its 66.75-inch wheelbase.
Production
| Description | Built in Rock Island, Illinois, USA |
|---|---|
| Manufacturer | McCormick-Deering |
Engine
| Aux. fuel | 0.75 gal (2.8 L) |
|---|---|
| Engine type | International Harvester 2.5L 4-cyl gasoline |
| Fuel tank | 17.5 gal (66.2 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 3.375x4.45 inches (86 x 113 mm) |
| Compression | 5.9:1 (high-compression gasoline) |
| Coolant capacity | 17 qts (16.1 L) |
| Description | International Harvester / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 152.1 ci (2.5 L) |
| Firing order | 1-3-4-2 |
| Oil capacity | 6 qts (5.7 L) |
| Rated RPM | 1650 |
| Belt (claimed) | 27.5 hp (20.5 kW) |
| Drawbar (claimed) | 25 hp (18.6 kW) |
Transmission
| Gears | 5 forward and 1 reverse |
|---|---|
| Oil capacity | 24 qts (22.7 L) |
| Transmission type | 5-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
PTO
| Rear PTO Type | 540 |
|---|
Dimensions & Tires
| Clearance (front axle) | 15.125 inches (38 cm) |
|---|---|
| Front tread | 45.875 inches (116 cm) |
| Height | 57.125 inches (145 cm) |
| Length | 120.875 inches (307 cm) |
| Rear tread | 41.75 inches (106 cm) |
| Shipping weight | 4120 lbs (1868 kg) |
| Wheelbase | 66.75 inches (169 cm) |
| Width | 55.5 inches (140 cm) |
| Front tire | 5.50-16 |
| Rear tire | 12-26 |
| Weight | 4120 lbs (1868 kg) |
| Wheelbase | 66.75 inches (169 cm) |
| Ag front | 5.50-16 |
| Ag rear | 12-26 |
Belt Pulley
| Diameter | 9.75 inches (24 cm) |
|---|---|
| RPM | 1019 |
| Speed | 2601 ft/min (792.78 meters/min) |
| Width | 7.5 inches (19 cm) |
References
| Description | General Line Catalog published in 1949, by International Harvester |
|---|
Variants
| O-4 | orchard |
|---|---|
| OS-4 | orchard, without full sheet metal |
| W-4 | standard |