This manual covers the Caterpillar 320C and 320CL excavators, part of the C Series generation. These machines are engineered for robust performance and reliability in demanding construction and earthmoving applications. Featuring a powerful CAT 3066T turbocharged diesel engine with a displacement of 6.35 liters, they deliver exceptional digging depth, reach, and lifting capabilities. The hydrostatic transmission and tracked drive system provide excellent maneuverability across various terrains, making these excavators versatile tools for a wide range of projects. This comprehensive Parts Manual, presented in English, provides detailed information essential for identifying and ordering components for your Caterpillar 320C or 320CL excavator. It is designed to assist owners, technicians, and service personnel in maintaining the optimal performance and longevity of the equipment. The manual includes clear, illustrated instructions and technical specifications, covering critical areas such as engine, transmission, undercarriage, and fluid capacities, ensuring accurate part selection and efficient service operations.