Powered by eco-friendly Agco Power Diesel 6.6 liter, 204 hp, EPA Tier 4 Interim emissions certified engine, Komatsu 855.1 Forwarder features smart integrated transmission control unit, optimized power train with double bogie bearings, and cooling system with variable speed fan. Comfort Ride active cab suspension system, using 4 hydraulic cylinders, keeps cab level in relation to machine frame during operation, maximizing operator comfort in hilly and difficult terrain.