Head to head
Caterpillar D3 vs Komatsu D51PX
The Komatsu D51PX is the bigger machine by 4,818kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Komatsu D51PX is the bigger machine by 4,818kg.
Specifications side by side
| Caterpillar D3 | Komatsu D51PX | |
|---|---|---|
| Operating weight | 9362kg (20,640lb) | 14,180kg |
| Engine power | 77.6kW (104hp) | - |
| Blade capacity | 2.19m3, or 2.34m3 with LGP tracks | - |
| Engine | Cat C3.6 | - |
| Class | - | 14 tonne |
Sources: Caterpillar D3, Komatsu D51PX. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the D3 if...
Caterpillar's smallest crawler dozer, used for fine grading, landscaping and confined-site work where a full-size dozer won't fit. Common in UK plant hire fleets alongside mini excavators.
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 4,818kg
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 D3 and the Komatsu D51PX?
The Komatsu D51PX is the bigger machine by 4,818kg. The Caterpillar D3 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.