This manual covers the Hino RB145 W04D W04T engine, a robust component designed for reliable performance. Engineered with precision, this engine is built to meet demanding operational needs, reflecting Hino's commitment to quality and durability. Its design prioritizes efficiency and longevity, making it a trusted choice for various applications where consistent power and dependable operation are paramount. The purpose of this comprehensive service repair workshop manual is to provide detailed instructions for the maintenance, diagnosis, and repair of the Hino RB145 W04D W04T engine. It is intended for both owners with basic mechanical knowledge and professional technicians. Inside, you will find step-by-step procedures, diagrams, illustrations, wiring schematics, and essential specifications covering engine identification, general precautions, maintenance checklists, the engine body, fuel system, cooling system, electrical system, troubleshooting, and more. This manual ensures that all repair and service tasks can be performed accurately and efficiently, mirroring the information used by authorized service departments.