Excavators are heavy construction equipment consisting of a boom, dipper (or stick), bucket and cab on a rotating platform known as the "house". The house sits atop an undercarriage with tracks or wheels They are a natural progression from the steam shovels and often mistakenly called power shovels. All movement and functions of a hydraulic excavator are accomplished through the use of hydraulic Fluid, with hydraulic cylinders and hydraulic motors. Due to the linear actuation of hydraulic cylinders, their mode of operation is fundamentally different from cable-operated excavators which use winches and steel ropes to accomplish the movements.
The operator of the excavator uses pedals and levers to steer the equipment and to move backward and forwards. Tracks, similar to tank tracks, are activated by the diesel-powered engine, and hydraulic motors control the arm of the excavator. While you no longer need to possess an excavator licence to operate an excavator for typical excavation jobs, you will need to prove competency in way of certification.