John Deere 420
Built: 1956-1958 · Series: Other models
Built in 1956-1958, the John Deere 420 is a tractor from John Deere. It is powered by a two-cylinder engine producing 21 kW. Rated power is reached at 1,850 rpm.
It runs on petrol, all-fuel or LP; the engine is water-cooled. The predecessor was the John Deere 40, the successor the John Deere 430. 55,000 units were produced in all. Within the range, rated power spans from 10 to 420 kW; with 21 kW, the 420 sits at the bottom end. Directly alongside are the 3028EN with 20.9 kW below and the 3120 (new) with 22 kW above.
Technical data
Engine
| Engine make | John Deerecorrect |
|---|---|
| Fuel | gasoline/all-fuel/LPcorrect |
| Power | 28 hp (21 kW)correct |
| Rated speed | 1,850 rpmcorrect |
| Cylinders | 2correct |
| Displacement | 113 cu incorrect |
| Bore | 4.25 in (107,9 mm)correct |
| Stroke | 4 in (101,6 mm)correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Unladen weight | 3,250 lbs (1474,2 kg)correct |
|---|
Drivetrain and chassis
| Drive | rear-wheel driveWDcorrect |
|---|---|
| Forward gears | 4correct |
| Reverse gears | 1correct |
Working data
| Fuel tank capacity | 10.5 gal (gas/all-fuel); 20 gal (LP)correct |
|---|---|
| PTO speed | 540correct |
| Linkage category | Cat Icorrect |
Origin and approval
| Plant | Dubuque, Iowa, USAcorrect |
|---|---|
| Units built | 55correct |
| Predecessor | John Deere 40correct |
| Successor | John Deere 430correct |
Frequently asked questions
How much power does the John Deere 420 have?
The John Deere 420 delivers 28 hp.
What engine does the John Deere 420 have?
2 cylinders, gasoline/all-fuel/LP.
When was the John Deere 420 built?
Production years: 1956-1958.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 24 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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