The D65-17 crawler dozers are powered by a Komatsu Tier 4 Interim, 8.9-liter diesel engine rated at 205 hp at 1,950 rpm 5% reduction in fuel consumption over the previous Tier 3 model SIGMADOZER ...

To help make sure it rarely impacts operations, all Komatsu D65/D85/D155 models use continuous passive regeneration and active regeneration that typically doesn’t require the dozer to stop ...