Head to head
Caterpillar D3 vs Hitachi ZX33U-6
The Caterpillar D3 has 59kW more power.
Last reviewed 13 September 2026
Key differences
- Engine power: the Caterpillar D3 has 59kW more power.
Specifications side by side
| Caterpillar D3 | Hitachi ZX33U-6 | |
|---|---|---|
| Operating weight | 9362kg (20,640lb) | 3,320 - 3,720kg |
| Engine power | 77.6kW (104hp) | 18.8kW |
| Blade capacity | 2.19m3, or 2.34m3 with LGP tracks | - |
| Engine | Cat C3.6 | - |
| Dig depth | - | 2,790 - 3,130mm |
Sources: Caterpillar D3, Hitachi ZX33U-6. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the D3 if...
- you want one that has 59kW more power
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 ZX33U-6 if...
A general-purpose mini digger for landscaping, utilities and small groundworks contractors who need to work in gardens, driveways and other access-restricted sites. Its zero tail swing lets it turn on the spot without swinging into fences or walls.
Listed by
- McGovern Plant Hire - Hounslow, Cranford
Common questions
What is the difference between the Caterpillar D3 and the Hitachi ZX33U-6?
The Caterpillar D3 has 59kW more power. The Caterpillar D3 is a small crawler dozer; the Hitachi ZX33U-6 is a 3.3-3.7 tonne zero tail swing mini excavator.
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