A hydraulic excavator is a powerful construction machine used for digging, lifting, and moving materials. It operates using hydraulic systems, which utilize pressurized fluid to create movement in its various components. The main parts of a hydraulic excavator include the boom, arm, bucket, and tracks, allowing it to perform tasks efficiently on construction sites, mining operations, and demolition projects. These machines come in various sizes, from compact models for small jobs to large excavators for heavy-duty tasks. The versatility of a hydraulic excavator makes it suitable for different applications, such as earthmoving, landscaping, and site preparation.