Head to head
Caterpillar D3 vs Kubota U55-4
The Caterpillar D3 has 44kW more power and is the bigger machine by 3,962kg.
Last reviewed 13 September 2026
Key differences
- Engine power: the Caterpillar D3 has 44kW more power.
- Operating weight: the Caterpillar D3 is the bigger machine by 3,962kg.
Specifications side by side
| Caterpillar D3 | Kubota U55-4 | |
|---|---|---|
| Operating weight | 9362kg (20,640lb) | 5400kg |
| Engine power | 77.6kW (104hp) | 46PS |
| Blade capacity | 2.19m3, or 2.34m3 with LGP tracks | - |
| Engine | Cat C3.6 | - |
Sources: Caterpillar D3, Kubota U55-4. 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 44kW more power
- you want one that is the bigger machine by 3,962kg
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 U55-4 if...
A midi excavator for groundworks, utilities and landscaping contractors. At 5.4 tonnes it arrives on a lorry rather than behind a car.
Listed by
- Yorkshire Plant Sales - Wakefield, Leeds
Common questions
What is the difference between the Caterpillar D3 and the Kubota U55-4?
The Caterpillar D3 has 44kW more power and is the bigger machine by 3,962kg. The Caterpillar D3 is a small crawler dozer; the Kubota U55-4 is a midi excavator, 3 to 6 tonnes.
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