John Deere 859MH – specifications
Series: Other models
Build year not documented · Data origin: Directory data · sources
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John Deere harvesters – other models: wheeled harvesters of the E/G series from Joensuu and tracked harvesters of the M series, John Deere six-cylinders, 15,750 to 40,914 kg operating weight
This page gathers the John Deere forestry machines the register could not assign to a named range: the wheeled harvesters of the E and G series (1070E, 1170E, 1270G) and the tracked harvesters of the M series (803MH to 959MH), where the MH suffix marks the harvester version of the base machine as distinct from the forwarder version MF. John Deere acquired the Finnish forestry-machine maker Timberjack in 2000 and has run the forestry division under its own name ever since, with the main plant for the wheeled harvesters in Joensuu, Finland.
Read on 3 more paragraphs
The register lists here 8 versions with engines of 6,800.6 to 9,001.4 cm³ displacement – including the John Deere units 6090H, PowerTech Plus 6068, PowerTech Plus 6090 PSS and 6090HTJ – operating weights from 15,750 to 40,914 kg and widths from 2,660 to 2,750 mm.
Harvesters of this size class fell, delimb and cross-cut trees in a single pass and form the backbone of mechanised timber harvesting in Scandinavia, North America and central Europe; the choice between wheeled and tracked undercarriage depends on terrain slope and ground bearing capacity.
On used examples, operating hours and the condition of the six-cylinder diesel engine, wear on the undercarriage and sprockets or tyres, the condition of the crane and the harvester head with saw chain and feed rollers, and hydraulic tightness all matter; spare parts and servicing run through the John Deere forestry network.
Sources: SpecCodex register, model data: John Deere Harvester (weitere Modelle), John Deere Forstmaschinen (manufacturer)
Technical data
Engine
| Engine make | John Deerecorrect |
|---|---|
| Engine model | 6090Hcorrect |
| Displacement | 9,001.4 cm³correct |
Dimensions and weights
| Ground clearance | 725.2 mmcorrect |
|---|---|
| Unladen weight | 37,450 kgcorrect |
Drivetrain and chassis
| Top speed | 3.7 km/hcorrect |
|---|
Other data
| System voltage | 24 Vcorrect |
|---|
Frequently asked questions
How much does the John Deere 859MH weigh?
The unladen weight is 37,450 kg.
What engine does the John Deere 859MH have?
9,001 cm³ displacement.
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.
- 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 7 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: RitchieSpecs equipment specifications (retrieved August 2026) · Data sources and cross-checks
Harvester in 3D section
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