Komatsu America Corp.’s D155AX-6 crawler dozer was developed for both ripping and dozing operations. The machine combines the SigmaDozer blade with highly efficient automatic-shift transmission with lockup torque converter to achieve exceptional productivity and fuel economy. The crawler dozer has an operating weight of 87,100 lb and features a powerful, clean SAA6D140E-5 turbocharged, after-cooled diesel engine that provides a maximum net horsepower of 354 with hydraulic fan maximum speed of 320 hp.