Head to head
Komatsu D51PX vs Mecalac 9MDX
The Komatsu D51PX is the bigger machine by 8,865kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Komatsu D51PX is the bigger machine by 8,865kg.
Specifications side by side
| Komatsu D51PX | Mecalac 9MDX | |
|---|---|---|
| Operating weight | 14,180kg | 5315 kg (11718 lb) to 5715 kg (12600 lb) |
| Class | 14 tonne | - |
| Payload | - | 9000 kg |
| Engine power | - | 55,4 kW (74 hp) |
| Travel speed | - | 25 km/h |
Sources: Komatsu D51PX, Mecalac 9MDX. 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 8,865kg
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 9MDX if...
A 9 tonne dumper with a fully enclosed ROPS/FOPS cab for bulk earthmoving, civils and road works on UK sites. Available with front tip or swivel skip.
Full 9MDX specifications →Common questions
What is the difference between the Komatsu D51PX and the Mecalac 9MDX?
The Komatsu D51PX is the bigger machine by 8,865kg. The Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class; the Mecalac 9MDX is a 9 tonne cabbed site dumper.
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