This manual covers the HINO W06D and W06D-TI diesel engines, specifically the 5.759L, 4-cycle, 6-cylinder, in-line, water-cooled, direct injection, turbocharged variants. These engines are known for their robust engineering and reliability, making them suitable for various demanding applications. This comprehensive guide provides detailed information to ensure optimal performance and longevity of your HINO engine. The purpose of this manual is to serve as an authoritative resource for all maintenance, repair, and diagnostic procedures. It includes detailed sections on general information, specifications, engine systems, turbocharger, fuel injection, lubrication, cooling, and electrical equipment. With step-by-step instructions, diagrams, and troubleshooting guidance, this manual is an essential tool for both do-it-yourself owners and professional mechanics seeking to maintain and service their HINO W06D or W06D-TI engine effectively. A parts number book is also included for convenient identification of components.