Komatsu D31EX-21

Three new dozers from Komatsu, the D31EX/PX-21, D37EX/PX-21 and D39EX/PX-21, feature Tier-2-compliant Komatsu diesel engines and the KomStat II electronic-control, hydrostatic transmission. The new Komstat system allows the operator to choose from 20 speed increments and from three distinct speed ranges, provided by the three-speed travel motors. This dual-path, closed-circuit drive system allows full-power turns and easier control when benching.