The term "PC400" typically refers to a model of hydraulic excavator manufactured by Komatsu. This machine is designed for heavy construction and earthmoving tasks, featuring a powerful engine and advanced hydraulic systems that enhance its performance and efficiency on job sites. The PC400 excavator is known for its versatility, capable of performing various functions such as digging, lifting, and grading. It is often used in large-scale projects like road construction, mining, and demolition, making it a valuable asset for contractors and construction companies.