John Deere 8420T
Built: 2003-2003 · Series: Other models
More machines from model year 2003
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
John Deere – other models: the collective page of tractors outside the named ranges, from the two-cylinders and the 10 series (1020, 2020) through the 40s and 50s from Mannheim to the 1023E, 3038E and 9RX, 6 to 468 kW, John Deere, Yanmar and Lombardini engines
This page gathers the John Deere tractors the register could not assign to a named range – from the successors of the two-cylinders through the European ranges from Mannheim to the compact tractors from Augusta, Georgia. John Deere, founded in 1837 as a plough smithy in Illinois, has built tractors in Waterloo, Iowa, since 1918 and since 1956, with the takeover of Lanz, in Mannheim, today the largest tractor plant outside North America. The type logic: the 10 series of 1960 (1010 to 5010) brought the four- and six-cylinders after the two-cylinder era, the 20s, 30s and 40s (1020, 2130, 2140) the Mannheim generations of the 1960s to 1980s, in which the first digit gives the size and the last ones the generation; the 50s (1750 to 3650) followed in 1986, the 55s and 6000s in 1992. Since 1992 the first digit marks the range (1 to 9) and the following ones the power – 1023E as a 1 series compact with 23 hp, 3038E as a 3 series with 38 hp, 5075E as a 5 series with 75 hp – E, M and R the equipment lines from basic to premium. The engines are Deere's own PowerTech range in the big, Yanmar in the compact and Lombardini in the smallest tractors.
Read on 3 more paragraphs
The register lists here 925 versions with 6.3 to 468.3 kW from one- to six-cylinders of 341 to 13,503 cm³, PTO outputs from 17 to 365 hp, lift capacities from 309 to 13,494 kg, unladen weights from 363 to 20,371 kg, lengths from 2,362 to 6,880 mm and widths from 1,194 to 3,952 mm.
John Deere has been the world's largest farm-equipment maker for decades; the Mannheim 6 series is Europe's best-selling tractor, the compacts from Augusta North America's.
On used tractors, originality and engine condition count on classics, transmission (Synchron or Power-Synchron) and hydraulics on the Mannheim 40s and 50s, and on the E, M and R models operating hours, transmission (PowrQuad, AutoQuad, AutoPowr), electronics and exhaust aftertreatment; parts run through the Deere network.
Sources: Kennwerte der Modelle John Deere (weitere Modelle), John Deere (Hersteller)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 270 hp (198 kW)correct |
| Rated speed | 2,200 rpmcorrect |
| Rated speed | 2.200/mincorrect |
| Cylinders | 6correct |
| Cylinders | 6 Hubraumcorrect |
| Displacement | 8,134 cm³correct |
| Cooling system | water-cooledcorrect |
| Torque rise | 49, 3 %correct |
Dimensions and weights
| Length | 6,170 mmcorrect |
|---|---|
| Width | 2,543 mmcorrect |
| Height | 3,122 mmcorrect |
| Wheelbase | 2,260 mmcorrect |
| Ground clearance | 350 mmcorrect |
| Unladen weight | 11,300 kgcorrect |
Drivetrain and chassis
| Gearbox | 16V/4R or 16V/5Rcorrect |
|---|---|
| Forward gears | 16correct |
| Reverse gears | 5correct |
| Top speed | 30 km/hcorrect |
| Drive type | track drivecorrect |
| Construction type | frame constructioncorrect |
Working data
| Fuel tank capacity | 492 lcorrect |
|---|
Origin and approval
| Production period | 2,002correct |
|---|---|
| Type | 6.081 HRWcorrect |
| Series/Model | 8420 Tcorrect |
Other data
| Deere modellreihe | 8020ercorrect |
|---|---|
| Gesamtübersetzung | 1.Gangcorrect |
| Linkage category | Cat III/IIIcorrect |
| Spurweite | 2,235correct |
Where this model stands
Power-to-weight ratio: 17.5 kW/t (198 kW / 11.3 t)
Power class: Heavy (> 180 hp)
Stronger than 96% of the tractors in the register — out of 15,659 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 8420T have?
The John Deere 8420T delivers 270 hp.
How much does the John Deere 8420T weigh?
The unladen weight is 11,300 kg.
What engine does the John Deere 8420T have?
6 cylinders, 8,134 cm³ displacement, Diesel.
How fast does the John Deere 8420T go?
Top speed is 30 km/h.
What are the dimensions of the John Deere 8420T?
6,170 mm × 2,543 mm × 3,122 mm.
When was the John Deere 8420T built?
Production years: 2003.
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.
- 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 33 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.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
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