Head to head
Caterpillar D3 vs Keestrack Frontier K6
The Caterpillar D3 is a small crawler dozer. The Keestrack Frontier K6 is a tracked mobile screener.
Last reviewed 13 September 2026
Specifications side by side
| Caterpillar D3 | Keestrack Frontier K6 | |
|---|---|---|
| Engine | Cat C3.6 | 79 kW/88 kW |
| Operating weight | 9362kg (20,640lb) | - |
| Engine power | 77.6kW (104hp) | - |
| Blade capacity | 2.19m3, or 2.34m3 with LGP tracks | - |
| Capacity | - | up to 600 t |
| Weight | - | 29,5 t / 32,5 sT |
| Screen box | - | 4500 x1800 mm / 15' x 6' (l x w) |
| Feed hopper in HB450 | - | 8,5 m3 / 10 yard3 |
Sources: Caterpillar D3, Keestrack Frontier K6. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the D3 if...
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 Frontier K6 if...
A tracked mobile screener used by quarries and recycling yards to grade crushed rock, topsoil or aggregate into different size fractions on site.
Full Frontier K6 specifications →Common questions
What is the difference between the Caterpillar D3 and the Keestrack Frontier K6?
The Caterpillar D3 is a small crawler dozer; the Keestrack Frontier K6 is a tracked mobile screener.
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