Head to head
Komatsu D51PX vs Kubota U55-4
The Komatsu D51PX is the bigger machine by 8,780kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Komatsu D51PX is the bigger machine by 8,780kg.
Specifications side by side
| Komatsu D51PX | Kubota U55-4 | |
|---|---|---|
| Operating weight | 14,180kg | 5400kg |
| Class | 14 tonne | - |
| Engine power | - | 46PS |
Sources: Komatsu D51PX, Kubota U55-4. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the D51PX if...
- you want one that is the bigger machine by 8,780kg
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
Buy or hire the U55-4 if...
A midi excavator for groundworks, utilities and landscaping contractors. At 5.4 tonnes it arrives on a lorry rather than behind a car.
Listed by
- Yorkshire Plant Sales - Wakefield, Leeds
Common questions
What is the difference between the Komatsu D51PX and the Kubota U55-4?
The Komatsu D51PX is the bigger machine by 8,780kg. The Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class; the Kubota U55-4 is a midi excavator, 3 to 6 tonnes.
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