The John Deere Unstyled D is a 2WD standard-tread tractor from the Two-Cylinder Letter series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 1923 to 1953. This first generation was manufactured from 1923 to 1939.
The John Deere model D is equipped with one of two engines: a 7.6 L (465.0 cu·in) two-cylinder all-fuel engine or an 8.2 L (501.0 cu·in) two-cylinder all-fuel engine and one of two transmissions: unsynchronized gear transmission with 2 forward and 1 reverse gear, used from 1923 to 1935, and unsynchronized gear transmission with 3 forward and 1 reverse gear, was introduced in 1935.
The tractor could be equipped with the following engines:
- John Deere (1923-1927). It is a 7.6 L, 7,620 cm2, (465.0 cu·in) two-cylinder natural aspirated all-fuel engine with 165.0 mm (6.5 in) of the cylinder bore and 178.0 mm (7.01 in) of the piston stroke. The compression ratio rating is 3.91:1.
- John Deere (1927-1939). It is a 8.2 L, 8,210 cm2, (501.0 cu·in) two-cylinder natural aspirated all-fuel engine. The cylinder bore is 171.0 mm (6.73 in) and the piston stroke is 178.0 mm (7.01 in). The compression ratio rating is 3.91:1.
The JD Unstyled D is equipped with manual steering, an open operator station, and 68.1 liters (18 US gal.; 15 Imp. gal) fuel tank.
John Deere Unstyled D Specifications
| General Specifications | |
| Model | John Deere Unstyled D |
| Length | Before 193: 2,760 mm (108.7 in) After 1930: 3,300 mm (129.9 in) |
| Width | 1,420 mm (55.9 in) |
| Height (hood) | Before 193: 1,420 mm (55.9 in) 1930-1934: 1,470 mm (58.0 in) After 1934: 1,550 mm (61.0 in) |
| Weight | Early: 1,855 kg (4,090 lbs) Late: 2,670 kg (5,886 lbs) |
| Fuel tank capacity | Before 1931: 68.1 liters (18 US gal.; 15 Imp. gal) After 1931: 88.9 liters (23.5 US gal.; 19.6 Imp. gal) |
| Battery | – |
| Cabin type | Open operator station |
| Engine | |
| Engine model | John Deere |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 2 |
| Fuel type | All-fuel |
| Displacement | 7.6 L, 7,620 cm2, (465.0 cu·in) |
| Bore and stroke | 165.0 mm X 178.0 mm (6.5 in X 7.01 in) |
| Compression ratio | 3.91:1 |
| Horsepower | – |
| Coolant capacity: | 49.2 L (52 US. qt, 43.3 Imp. qt.) |
| Engine | |
| Engine model | John Deere |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 2 |
| Fuel type | All-fuel |
| Displacement | 8.2 L, 8,210 cm2, (501.0 cu·in) |
| Bore and stroke | 171.0 mm X 178.0 mm (6.73 in X 7.01 in) |
| Compression ratio | 3.91:1 |
| Horsepower | – |
| Starter | Electric |
| Oil capacity: | 12.3 L (13 US. qt, 10.8 Imp. qt.) |
| Coolant capacity: | Before 1931: 49.2 L (52 US. qt, 43.3 Imp. qt.) After 1931: 53.0 L (56 US. qt, 46.6 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×2 2WD |
| Steering type | Manual |
| Brakes | – |
| Transmission model | – |
| Transmission type | Unsynchronized gear |
| Gears | 2 forward and 1 reverse |
| Speed | Forward: 5.3 kmh (3.3 mph) Reverse: kmh (0 mph) |
| Transmission model | – |
| Transmission type | Unsynchronized gear |
| Gears | 3 forward and 1 reverse |
| Speed | Forward: 6.4 kmh (4 mph) Reverse: 2.4 kmh (1.5 mph) |
| Tires | |
| Front tires | Ag: 8×5 (steel), 28×6 (steel), 7.50×18 |
| Rear tires | Ag: 46×12 (steel), 12.75×28 |
| PTO (Power take-off shaft) | |
| Rear PTO type | Optional |
| Rear PTO speed | 525 rpm |
| John Deere D serial numbers | |
| 1924 | 30401 |
| 1925 | 31280 |
| 1926 | 35309 |
| 1927 | 43410 |
| 1928 | 53388 |
| 1929 | 71645 |
| 1930 | 95367 |
| 1931 | 109944 |
| 1932 | 115509 |
| 1933 | 115665 |
| 1934 | 116273 |
| 1935 | 119100 |
| 1936 | 125079 |
| 1937 | 130700 |
| 1938 | 138413 |
| 1939 | 142300 |
| Final | 143799 |
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