Head to head
Hitachi ZX85USB-6 vs Komatsu D51PX
The Hitachi ZX85USB-6 is a 8.4-9.1 tonne zero tail swing crawler excavator. The Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class.
Last reviewed 13 September 2026
Specifications side by side
| Hitachi ZX85USB-6 | Komatsu D51PX | |
|---|---|---|
| Operating weight | 8,430 - 9,060kg | 14,180kg |
| Dig depth | 3,910 - 4,510mm | - |
| Engine power | 42.4kW | - |
| Class | - | 14 tonne |
Sources: Hitachi ZX85USB-6, Komatsu D51PX. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the ZX85USB-6 if...
A popular hire-fleet size for groundworkers and utility contractors who need more reach and dig depth than a mini excavator but still want a zero-swing tail for working close to walls and other plant. Common on drainage and footing jobs on housing sites.
Listed by
- Red Plant Sales Ltd - Colchester, Frating
- McGovern Plant Hire - Hounslow, Cranford
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 Hitachi ZX85USB-6 and the Komatsu D51PX?
The Hitachi ZX85USB-6 is a 8.4-9.1 tonne zero tail swing crawler excavator; the Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class.
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