Comparison · Bulldozer
Caterpillar D4 vs Komatsu D51EX-24
The Komatsu D51EX-24 is about 3% heavier than the Caterpillar D4 (13,699 vs 13,272 kg), which usually means more stability and lifting capacity but higher transport weight.
Engine output is effectively the same on both machines.
Beyond the numbers, compare local dealer support, parts availability and resale value for Caterpillar and Komatsu in your region: over the life of a machine they often matter more than small specification differences.
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| Operating weight | 13,272 kg (29,300 lb) | 13,699 kg (30,200 lb) |
| Engine power | 97 kW (130 hp) | 98 kW (131 hp) |
| Net power (ISO 9249) | 97 kW (130 hp) | 98 kW (131 hp) at 2,200 rpm |
| Blade capacity | 3.26 m³ standard / 3.81 m³ LGP (4.26 / 4.98 yd³) | 2.7 m³ (3.5 yd³), Power Angle Tilt (PAT) |
| Engine | Cat C4.4 | Komatsu SAA4D107E-3, 4.5 L, four cylinders, variable-geometry turbo |
| Drive | Hydrostatic | Hydrostatic |
| Fuel tank | 261 L (69 US gal) | — |
| Shoes | 560 mm (22 in) standard; 760 mm (30 in) LGP | — |
| Ground pressure | 40.7 kPa (5.9 psi) standard; 31 kPa (4.5 psi) LGP | 39.9 kPa (5.79 psi) |
| Rollers | Lifetime-lubricated, 8 track + 2 carrier rollers per side | — |
| Emissions | US EPA Tier 4 Final / EU Stage V | US EPA Tier 4 Final |
| Track gauge | — | 1.79 m (5 ft 10 in) |
| Length of track on ground | — | 2.75 m (9 ft) |
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| Full D4 review | Full D51EX-24 review |
Specifications are typical figures for standard configurations and may be measured differently by each manufacturer (for example net vs gross power). Always confirm with the manufacturer or dealer. Build another comparison.