Tier 4 Crawler Dozer Has More HP

Komatsu America Corp. introduced the D375A-8 crawler dozer. It features an Environmental Protection Agency (EPA) Tier 4 Final certified engine that produces more than 20% more horsepower while the dozer is traveling in the reverse direction. The additional horsepower yields faster cycle times and a productivity increase of up to 18%, the company reported.
The mining-class dozer comes with structural enhancements for increased durability of the mainframe and track frame. The D375A-8 also features an improved suspended undercarriage, larger viscous cab mounts, and a new air-suspension heated and ventilated seat for overall operator comfort.
The dozer offers 609 hp in forward, and 748 hp in reverse. Engine components include Variable Geometry Turbocharger; high-pressure, common rail fuel injection system; dual Komatsu Diesel Particulate Filters; large-capacity and high-efficiency exhaust gas recirculation coolers; and an automatic, three-speed transmission with an automatically engaging lockup torque converter.
Enhancements include changes to suspended undercarriage, cab isolators, operator seat, and ergonomics of operator interface; structural enhancements of track frame; new single link blade support and larger trunnion bearings; and improved visibility to cutting edge and ripper point.
http://www.komatsuamerica.com