John Deere · Letter Series series
John Deere Model A
Row-crop tractor · 1934–1952 · Distillate
The John Deere Model A, launched in 1934, was Deere's first true general-purpose row-crop tractor, built with an adjustable rear tread width to compete head-on with International Harvester's Farmall line. Powered by Deere's signature two-cylinder engine, it grew from 309 to 321 cubic inches over an 18-year run. Late-production 1952 models became the first Deere tractors equipped with the industry-first Powr-Trol hydraulic system, bridging the two-cylinder era and modern hydraulics.
- PTO power
- 23.6 hp
- Weight
- 3,783 lb (1,716 kg)
- Displacement
- 309 ci (5.1 L)
- Total built
- 300,000
Specifications
| Type | Row-crop |
|---|---|
| Series | Letter Series |
| Production | 1934–1952 |
| Factory | Waterloo, Iowa, USA |
| Total built | 300,000 |
| Original price | $2,400 (1934 USD) |
| Make | John Deere |
|---|---|
| Fuel | Distillate |
| Cylinders | 2 |
| Displacement | 309 ci (5.1 L) |
| Bore × stroke | 5.50x6.50 in |
| Rated speed | 975 rpm |
| Compression | 4.45:1 |
| Cooling | liquid-cooled |
| Aspiration | Naturally aspirated |
| Drawbar power | 18.7 hp (14 kW) |
|---|---|
| PTO power | 23.6 hp (17.6 kW) |
| Belt power | 24.7 hp (18.4 kW) |
| Nebraska test | Nebraska Test 222 |
| Transmission | sliding-gear, unsynchronized — 4 forward, 1 reverse |
|---|---|
| Chassis | 4x2 2WD |
| Rear PTO | transmission |
|---|---|
| PTO speed | 540 rpm |
| Weight | 3,783 lb (1,716 kg) |
|---|---|
| Length | 124 in (315 cm) |
| Width | 83 in (211 cm) |
| Height | 60 in (152 cm) |
| Fuel capacity | 14 gal (53 L) |
| Coolant | 38 qt (36 L) |
| Crankcase | 9.25 qt (8.75 L) |
| Front tires | 24x4 |
| Rear tires | 50x6 |
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