The Caterpillar 345C is a large hydraulic excavator in Caterpillar's C Series lineup, designed for heavy-duty earthmoving, mass excavation, and site development work. It is typically used in mining, quarrying, road construction, and large-scale civil projects. The 345C features a crawler undercarriage, a reinforced boom and stick, and a high-capacity bucket configuration for productive digging and loading. Powered by a Caterpillar diesel engine, it is built for durability, fuel efficiency, and service access. The machine is commonly paired with various work tools and attachments for versatile operation across demanding jobsite conditions.