Head to head
Caterpillar D3 vs Kubota KX037-4
The Caterpillar D3 has 60kW more power and is the bigger machine by 5,844kg.
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 5,844kg.
Specifications side by side
| Caterpillar D3 | Kubota KX037-4 | |
|---|---|---|
| Operating weight | 9362kg (20,640lb) | 3518 kg |
| Engine power | 77.6kW (104hp) | 17.8 kw |
| Blade capacity | 2.19m3, or 2.34m3 with LGP tracks | - |
| Engine | Cat C3.6 | - |
| Dig depth | - | 3410 mm |
| Width | - | 1550 mm |
Sources: Caterpillar D3, Kubota KX037-4. 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 5,844kg
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 KX037-4 if...
A 3.5 tonne class digger used by groundworkers, utility contractors and hire fleets for trenching, foundations and landscaping. Suits sites that need more reach and lift than a 3 tonne machine.
Full KX037-4 specifications →Common questions
What is the difference between the Caterpillar D3 and the Kubota KX037-4?
The Caterpillar D3 has 60kW more power and is the bigger machine by 5,844kg. The Caterpillar D3 is a small crawler dozer; the Kubota KX037-4 is a 3.5 tonne class mini excavator.
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