The Komatsu PC400 is a hydraulic excavator in Komatsu's large excavator range, used for heavy-duty earthmoving, mining, quarrying, and large-scale construction work. It is typically equipped with a high-capacity boom, arm, and bucket combination, along with a diesel engine designed for sustained digging and loading performance. The PC400 is commonly configured with tracked undercarriage, hydraulic controls, and operator cab features for visibility and productivity. Applications include bulk excavation, trenching, material handling, and site preparation. As a Komatsu excavator model, the PC400 is recognized for its size class, hydraulic power, and suitability for demanding jobsite conditions.