This shop manual covers the DAEWOO DOOSAN MEGA 300-V Wheel Loader, serial number 3001 and up. Designed for heavy-duty applications, this machinery is engineered for robust performance and reliability in demanding work environments. The manual provides comprehensive details, including specifications, diagrams, and photographic illustrations, to support the operation and upkeep of this equipment. This publication serves as an essential resource for diagnosing, repairing, and maintaining your DAEWOO DOOSAN MEGA 300-V Wheel Loader. It covers critical areas such as safety protocols, general maintenance procedures, and detailed sections on the upper structure, lower structure and chassis, engine and drivetrain, hydraulics, electrical system, and attachments. Electrical and hydraulic schematics are also included, offering in-depth technical information for owners, mechanics, and technicians.