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Comparison · Bulldozer

Caterpillar D6 vs Komatsu D51EX-24

The Caterpillar D6 is about 71% heavier than the Komatsu D51EX-24 (22,250 vs 13,000 kg), which usually means more stability and lifting capacity but higher transport weight.

The Caterpillar D6 has about 65% more engine power (160 kW (215 hp) vs 97 kW (130 hp)).

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.

Caterpillar D6T crawler dozer on a river project
Caterpillar Caterpillar D6
Komatsu D51PX crawler dozer
Komatsu Komatsu D51EX-24
Operating weight 22,250 kg (49,100 lb)13,000 kg (28,700 lb)
Engine power 160 kW (215 hp)97 kW (130 hp)
Net power ≈160 kW (215 hp)≈97 kW (130 hp)
Blade capacity up to ≈5.6 m³ (7.3 yd³), SU blade—
Engine Cat C9.3B—
Drive Powershift or electric drive (XE)Hydrostatic
Emissions EPA Tier 4 Final / EU Stage V—
Blade —PAT (power-angle-tilt)
Strengths
  • + Electric-drive D6 XE claims significantly lower fuel use
  • + Cat Grade and Assist features as factory options
  • + Huge dealer, parts and resale support
  • + Excellent blade visibility
  • + Smooth hydrostatic drive
  • + iMC version available
Watch-outs
  • − Expensive, especially in XE form with technology
  • − Electric-drive complexity requires dealer expertise
  • − Smaller blade capacity than medium dozers
Full D6 reviewFull 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.