Head to head
Caterpillar D3 vs Kubota KX030-4
The Caterpillar D3 has 60kW more power and is the bigger machine by 6,572kg.
Last reviewed 13 September 2026
Key differences
- Engine power: the Caterpillar D3 has 60kW more power.
- Operating weight: the Caterpillar D3 is the bigger machine by 6,572kg.
Specifications side by side
| Caterpillar D3 | Kubota KX030-4 | |
|---|---|---|
| Operating weight | 9362kg (20,640lb) | 2790 kg |
| Engine power | 77.6kW (104hp) | 17.7 kw |
| Blade capacity | 2.19m3, or 2.34m3 with LGP tracks | - |
| Engine | Cat C3.6 | - |
| Dig depth | - | 2870 mm |
| Width | - | 1500 mm |
Sources: Caterpillar D3, Kubota KX030-4. 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 60kW more power
- you want one that is the bigger machine by 6,572kg
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 KX030-4 if...
A 3 tonne class digger for hire fleets, groundworkers and landscapers on trenching, drainage and foundation work in confined spaces. The reduced overhang helps on tight sites.
Full KX030-4 specifications →Common questions
What is the difference between the Caterpillar D3 and the Kubota KX030-4?
The Caterpillar D3 has 60kW more power and is the bigger machine by 6,572kg. The Caterpillar D3 is a small crawler dozer; the Kubota KX030-4 is a 2.8 tonne class mini excavator.
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