John Deere 7420 (A)
Built: 2003–2007 · Series: 7020er-Baureihe
More machines from model year 2003
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John Deere 7020 series – six-cylinder diesels from Waterloo, 2003 to 2006, types 7220 to 7420, 6,788 cc, 81 to 99 kW, torque 448 to 561 Nm
The John Deere 7020 series was built from 2003 to 2006 at the Waterloo plant in Iowa, USA, and covered the mid-range standard tractor class there for the North American market. The register lists the types 7220, 7320 and 7420 here, with the two stronger models additionally listed as a four-wheel-drive version (A). All three models are built around the same six-cylinder diesel engine of 6,788 cc as the sister series built at the same time in Mannheim, but with its own power steps for the American market.
Read on 3 more paragraphs
The register lists 3 versions here with 81 to 99.4 kW from the common six-cylinder of 6,788 cc at 2,100 to 2,300 rpm, torque of 448 to 561 Nm, kerb weights of 5,366 to 5,900 kg, a length of 4,471 mm, a width of 2,438 mm and a height of 2,865 mm.
The 7020 series covered the mid power segment in North American farming and competed with comparable standard tractors from Case IH and New Holland, which served similar arable and livestock holdings in the same period, often paired with a front loader for yard and feeding work.
When buying a used 7020 series model, the key points are operating hours and service history of the six-cylinder engine, condition of clutch and gearbox, and tightness of the hydraulics, plus corrosion on cab and chassis and the condition of the front axle on four-wheel-drive versions; spare parts are well available through regular John Deere parts channels.
Sources: SpecCodex register, model data: John Deere 7020er-Baureihe, John Deere (manufacturer)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 135 hp (99.4 kW)correct |
| Rated speed | 2,100 rpmcorrect |
| Torque | 561 Nmcorrect |
| Speed at max. torque | 1,398 rpmcorrect |
| Cylinders | 6correct |
| Displacement | 6,788 cm³correct |
| Bore | 106.5 mmcorrect |
| Stroke | 127 mmcorrect |
| Compression ratio | 17correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 4,471 mmcorrect |
|---|---|
| Width | 2,438 mmcorrect |
| Height | 2,865 mmcorrect |
| Wheelbase | 2,865 mmcorrect |
| Ground clearance | 520 mmcorrect |
| Unladen weight | 5,851 kgcorrect |
Drivetrain and chassis
| Drive | rear- or four-wheel drivecorrect |
|---|---|
| Gearbox | 16V/16R or 20V/20Rcorrect |
| Front tyres | 380/85 R 28 AScorrect |
| Rear tyres | 480/80 R 38 AScorrect |
| Top speed | 40 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 17 kW/t (99 kW / 5.9 t)
Power class: Large (100–180 hp)
Stronger than 79% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the John Deere 7420 (A) have?
The John Deere 7420 (A) delivers 135 hp.
How much does the John Deere 7420 (A) weigh?
The unladen weight is 5,851 kg.
What engine does the John Deere 7420 (A) have?
6 cylinders, 6,788 cm³ displacement, Diesel.
How fast does the John Deere 7420 (A) go?
Top speed is 40 km/h.
What are the dimensions of the John Deere 7420 (A)?
4,471 mm × 2,438 mm × 2,865 mm.
When was the John Deere 7420 (A) built?
Production years: 2003–2007.
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.
- Check the weights in the papers against the figures here — attachments change them.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- 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 1 recorded source; 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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Other models in this series
Sources: [1]
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