Dual Cat engines deliver 1200 hp (895 kW) to the machine. The cab, equipped with the TEC® Plus computer-aided control system, allows the T1655III Terrain Leveler® SEM to communicate with the various control modules located throughout the machine. While the machine is performing, the air ride suspension system on the cab provides a smooth, quiet ride for the operator in the typically harsh environment of a mining operation. It also features a filtered air system, dual self-contained cooling and heating systems, sound- attenuating foam as well as dual air ride suspension seats for optimum operator and trainer comfort.