McCormick-Deering O-4
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| Production | |
| Manufacturer | McCormick-Deering |
| Orchard/Vineyard tractor | |
| Built in Rock Island, Illinois, USA | |
| Total built | 2,721 |
| McCormick-Deering O-4 Engine | |
| International Harvester 2.5L 4-cyl gasoline | |
| Fuel tank | 17.5 gal 66.2 L |
| Aux. fuel | 0.75 gal 2.8 L |
 Engine details ... | |
| McCormick-Deering O-4 Power | |
| Belt (claimed) | 24 hp (kerosene) 17.9 kW |
| 27.5 hp (gasoline) 20.5 kW | |
| Mechanical | |
| Two-wheel drive | |
| Manual steering | |
| Open operator station |
| Power Take-off (PTO) | |
| Rear PTO Type | 540 |
| Dimensions & Tires | |
| Wheelbase | 66.75 inches 169 cm |
| Weight | 4320 lbs 1959 kg |
| Front tire | 5.50-16 |
| Rear tire | 12-26 |
 Full dimensions and tires ... | |
| 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 |
FAQ: How to read a serial number table. | |
| Belt Pulley | |
| Diameter | 9.75 inches 24 cm |
| Width | 7.5 inches 19 cm |
| RPM | 1019 |
| Speed | 2601 ft/min 792.78 meters/min |
| References | |
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| General Line Catalog published in 1949, by International Harvester |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on February 19, 2023 |