John Deere 6620
Built: 2002–2007 · Series: 6020-Baureihe
More machines from model year 2002
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John Deere 6020 line, Model 6620: a six-cylinder engine of 6,788 cc, 92 kW, 479 Nm of torque and a 7,421 kg lift capacity, built from 2002 to 2007
The 6620 belongs to John Deere's 6020 line, a European generation of larger general-purpose and field tractors with a six-cylinder engine, built from 2002 to 2007. This line was aimed at larger mixed and arable farms that needed more power than John Deere's smaller lines could offer.
Read on 3 more paragraphs
John Deere's own six-cylinder engine of 6,788 cc produces 92 kW (125 hp) at 2,300 rpm and delivers 479 Nm of torque. At a weight of 5,915 kg, with a wheelbase of 2,650 mm and a width of 2,445 mm, the hydraulics lift up to 7,421 kg, noticeably more than the manufacturer's smaller lines.
The combination of high engine output, strong torque and high lift capacity suits the 6620 to heavy tillage, large implements and front-loader work on larger arable and mixed farms. With a top speed of 40 km/h, the tractor sits at the boundary of the licence category for slow tractors, the same limit that applies to the smaller lines in the same maker's range.
Buying a used 6620 means the high-capacity hydraulics are a key checkpoint, as are the clutch and gearbox on a tractor that often worked with heavy implements over a long service life. The six-cylinder engine should be checked for oil consumption, smoke on start-up and smooth running at idle. Parts for this widely used line are well supplied through the European dealer network, including wearing items for the hydraulics.
Sources: SpecCodex-Register: Kennwerte des Modells 6620
Technical data
Engine
| Engine make | John Deerecorrect |
|---|---|
| Fuel | dieselcorrect |
| Power | 125 hp (92 kW)correct |
| Rated speed | 2,300 rpmcorrect |
| Torque | 479 Nmcorrect |
| Cylinders | 6correct |
| Displacement | 6,788 cm³ (414.1 cu in)correct |
| Bore | 4.19 in (106.4 mm)correct |
| Stroke | 5.00 in (127 mm)correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 4,705 mmcorrect |
|---|---|
| Width | 2,445 mmcorrect |
| Height | 2,875 mmcorrect |
| Wheelbase | 2,650 mmcorrect |
| Ground clearance | 460 mmcorrect |
| Unladen weight | 5,915 kg (11,532 lbs)correct |
Drivetrain and chassis
| Drive | four-wheel drivecorrect |
|---|---|
| Gearbox | 24V/24R or 36V/36Rcorrect |
| Front tyres | 540/65 R 28 AScorrect |
| Rear tyres | 650/65 R 38 AScorrect |
| Top speed | 40 km/hcorrect |
Working data
| Lifting capacity | 7,421 kgcorrect |
|---|---|
| Lifting capacity | 16360 lbs (7420.8 kg)correct |
| Fuel tank capacity | 207 l (54.7 gal)correct |
Origin and approval
| Construction | bridge-frame modular constructioncorrect |
|---|
Other data
| Linkage category | Cat II/III Ncorrect |
|---|---|
| PTO speed | 540/1000correct |
Where this model stands
Power-to-weight ratio: 15.6 kW/t (92 kW / 5.9 t)
Power class: Large (100–180 hp)
Stronger than 76% 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 6620 have?
The John Deere 6620 delivers 125 hp.
How much does the John Deere 6620 weigh?
The unladen weight is 5,915 kg.
What engine does the John Deere 6620 have?
6 cylinders, 6,788 cm³ displacement, Diesel.
How fast does the John Deere 6620 go?
Top speed is 40 km/h.
How much does the rear linkage of the John Deere 6620 lift?
The rear linkage lifts 7,421 kg.
What are the dimensions of the John Deere 6620?
4,705 mm × 2,445 mm × 2,875 mm.
When was the John Deere 6620 built?
Production years: 2002–2007.
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 35 individual figures for this model. They come from 3 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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Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.