Head to head
Caterpillar D4K2 vs Komatsu D51PX
The Komatsu D51PX is the bigger machine by 6,012kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Komatsu D51PX is the bigger machine by 6,012kg.
Specifications side by side
| Caterpillar D4K2 | Komatsu D51PX | |
|---|---|---|
| Operating weight | 8,168kg (XL) / 8,476kg (LGP) | 14,180kg |
| Engine power | 92hp (68.8kW), Cat C4.4 ACERT | - |
| Blade capacity | 1.98m3 (XL) / 1.85m3 (LGP) | - |
| Ground pressure | 38.6kPa (XL) / 29.2kPa (LGP) | - |
| Class | - | 14 tonne |
Sources: Caterpillar D4K2, Komatsu D51PX. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the D4K2 if...
Cat's smallest crawler dozer, used for grading, site clearance and landscaping where a larger machine would be too heavy or too wide. The LGP undercarriage option suits soft or wet ground.
Listed by
- B & T Plant Hire - Gravesend
- B & T Plant Hire Ltd - Morden
Buy or hire the D51PX if...
- you want one that is the bigger machine by 6,012kg
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 D4K2 and the Komatsu D51PX?
The Komatsu D51PX is the bigger machine by 6,012kg. The Caterpillar D4K2 is a small crawler dozer; the Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.