| Manufacturer |
McCormick-Deering |
| Price |
- |
| Model |
O-4 |
| Equipment Type |
Orchard Vineyard Tractors |
| Factory |
Rock Island, Illinois, USA |
MCCORMICK-DEERING O-4 POWER
| Belt (claimed) |
24 hp/17.9 kW (kerosene)/27.5 hp/20.5 kW (gasoline) |
ENGINE DETAIL
The McCormick-Deering O-4 tractor features a 152 ci (2.5 L) 4-cylinder liquid-cooled gasoline engine with various compression ratios, making it adaptable for high-compression gasoline, gasoline-distillate, or kerosene. At a rated RPM of 1650, this tractor offers a balance of power and efficiency, but its lower RPM threshold might limit its performance in heavy-duty tasks compared to modern tractors. Additionally, its 6 quart oil capacity suggests a necessity for regular maintenance to ensure optimal engine longevity and performance.
| Description |
International Harvester/gasoline/4-cylinder/liquid-cooled |
| Displacement |
152 ci/2.5 L |
| 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) |
| Rated RPM |
1650 |
| Oil capacity |
6 qts/5.7 L |
MCCORMICK-DEERING O-4 ENGINE
The McCormick-Deering O-4 features a robust International Harvester 2.5L 4-cylinder gasoline engine, offering reliable performance and ease of maintenance. Its compact design is advantageous for smaller farms, allowing for maneuverability in tight spaces; however, its horsepower may limit heavy-duty applications compared to larger models. Optimal for light to medium-duty tasks like plowing and cultivating, it excels in applications where versatility and fuel efficiency are prioritized.
| Description |
International Harvester 2.5L 4-cyl gasoline |
TRANSMISSION
The McCormick-Deering O-4 tractor features a 5-speed forward and 1-speed reverse gear configuration, allowing for versatility in various agricultural tasks. This gear setup enhances operational efficiency and adaptability, making it suitable for both plowing and transport activities. However, the limitations of a single reverse gear may challenge maneuverability in tight spaces compared to modern tractors with multi-speed options.
| Type |
gear |
| Gears |
5 forward and 1 reverse |
MECHANICAL
The McCormick-Deering O-4 features a 4x2 2WD chassis, which provides simplicity and ease of maintenance, but limits traction on uneven or muddy terrains. Its manual steering offers direct feedback for operator control, although it may require more physical effort compared to power steering systems. The 5-speed gear transmission allows for versatile speed adjustments, making it suitable for various agricultural tasks while optimizing power delivery to the wheels.
| Chassis |
4x2 2WD |
| Steering |
manual |
| Cab |
Open operator station |
| Transmission |
5-speed gear |
DIMENSIONS
| Length |
120.9 inches/307 cm |
| Width |
60.25 inches/153 cm |
| Height |
60.25 inches/153 cm |
| Weight |
4320 lbs/1959 kg |
DIMENSIONS & TIRES
The McCormick-Deering O-4 tractor, weighing 4320 lbs (1959 kg), offers commendable stability and traction for agricultural tasks. Its robust weight supports better performance in field operations, particularly in challenging soil conditions; however, this mass may limit mobility on uneven terrains. Considering its weight, scenarios involving hauling or plowing tasks would be advantageous, though operators should be mindful of potential compaction issues in softer soils.
O-4 SERIAL NUMBERS
| Location |
Left side of tractor, on clutch housing. |
| 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 |
