Head to head
Caterpillar D6K2 vs Komatsu D51PX
The Caterpillar D6K2 is the bigger machine by 15,078kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Caterpillar D6K2 is the bigger machine by 15,078kg.
Specifications side by side
| Caterpillar D6K2 | Komatsu D51PX | |
|---|---|---|
| Operating weight | 29,258lb (XL) / 30,664lb (LGP) | 14,180kg |
| Net power | Cat C4.4, 130hp | - |
| Blade capacity | 4.26yd3 (XL) / 4.98yd3 (LGP) | - |
| Class | - | 14 tonne |
Sources: Caterpillar D6K2, Komatsu D51PX. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the D6K2 if...
- you want one that is the bigger machine by 15,078kg
A medium dozer for site grading, cut-and-fill and light earthmoving where a full-size dozer would be overkill. It is hired by groundworks and landscaping contractors needing precise grading as much as raw pushing power.
Listed by
- B & T Plant Hire - Gravesend
- B & T Plant Hire Ltd - Morden
Buy or hire the D51PX if...
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 Caterpillar D6K2 and the Komatsu D51PX?
The Caterpillar D6K2 is the bigger machine by 15,078kg. The Caterpillar D6K2 is a medium crawler dozer; the Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class.
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