Head to head
Doosan DX63-3 vs Komatsu D51PX
The Komatsu D51PX is the bigger machine by 4,625kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Komatsu D51PX is the bigger machine by 4,625kg.
Specifications side by side
| Doosan DX63-3 | Komatsu D51PX | |
|---|---|---|
| Operating weight | 9,555lb (4,334kg) | 14,180kg |
| Engine power | 42.6hp gross / 39.5hp net at 2200rpm | - |
| Max dig depth | 10ft 6in (3.2m) | - |
| Bucket capacity | 0.19yd3 (0.145m3) | - |
| Class | - | 14 tonne |
Sources: Doosan DX63-3, Komatsu D51PX. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the DX63-3 if...
A compact excavator for utility, drainage and small groundworks jobs, sized to fit through a standard gateway. It suits contractors who need real digging depth without the weight and cost of a bigger machine.
Listed by
- Red Plant Sales Ltd - Colchester, Frating
Buy or hire the D51PX if...
- you want one that is the bigger machine by 4,625kg
A mid-size dozer built with wider, low ground pressure tracks for soft or wet ground. Groundworks and landfill contractors choose the PX variant over a standard-track D51 where the ground itself would otherwise bog a machine down.
Listed by
- B & T Plant Hire - Gravesend
- B & T Plant Hire Ltd - Morden
Common questions
What is the difference between the Doosan DX63-3 and the Komatsu D51PX?
The Komatsu D51PX is the bigger machine by 4,625kg. The Doosan DX63-3 is a 6-tonne class mini excavator; the Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class.
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