This manual covers the Doosan MEGA 160 Wheel Loader, specifically focusing on its electrical and hydraulic schematics. Designed for robust performance in demanding work environments, the MEGA 160 is engineered for reliability and efficiency. This comprehensive documentation ensures that operators and maintenance personnel have access to detailed information critical for understanding and managing the machine's complex systems. The purpose of this manual is to provide detailed schematics for the electrical and hydraulic circuits of the Doosan MEGA 160 Wheel Loader across various serial number ranges and configurations, including models with and without auxiliary steering. It serves as an essential resource for diagnosing issues, performing maintenance, and ensuring the optimal operation of the equipment. The content is presented in an electronic format, allowing for clear viewing and detailed examination of all diagrams and specifications.