This manual covers the Daewoo Doosan Mega 300-V Wheel Loader, designed for robust performance in various operational environments. Engineered for reliability and efficiency, this model represents a significant advancement in heavy equipment technology. Its durable construction and advanced features ensure optimal productivity and longevity, making it a valuable asset for demanding industrial and construction applications. This comprehensive service repair shop manual provides detailed instructions and technical specifications for the Daewoo Doosan Mega 300-V Wheel Loader, serial numbers 1001 and up (Tier I & II). It covers essential areas including safety procedures, general maintenance, upper and lower structures, chassis, engine, drivetrain, hydraulics, electrical systems, and attachments. The manual is structured to assist owners, mechanics, and technicians in performing accurate repairs and routine maintenance, ensuring the continued optimal performance and longevity of the equipment.