The KOMATSU HD405-7 dump trucks feature a Komatsu SAA6D140E-5 371kW (498HP) engine, with speeds of 2,000 RPM, with torque of 2,167 Nm, and heaped capacity of 27.3m3 / 35.7yd3. They have a small turning radius of 7.2 m, and can achieve maximum speeds of 70 km/h. They have a robust, compact design, and also feature a mode selection system, for economic fuel consumption, a 7-speed, fully automatic K-ATOMiCS transmission, brakes and a 887 HP retarder that are hydraulically controlled, an optional automatic retard speed control, and many other performance enhancing features.