This manual provides comprehensive service and repair information for the Hino RB145 W04D W04C engine. Designed for both do-it-yourself enthusiasts and experienced mechanics, it details procedures for maintaining and restoring the engine to optimal performance. The Hino RB145 W04D W04C engine is known for its robust engineering and reliability, making it a dependable choice for various applications. This guide ensures that owners can effectively manage their engine's upkeep. The scope of this manual covers all essential aspects of engine service, including general precautions, disassembly and assembly, maintenance checklists, and detailed troubleshooting guides. It also provides specific information on the engine body, fuel system, cooling system, exhaust system, and electrical components such as the alternator and regulator. With step-by-step instructions, hundreds of illustrations, and critical specifications, this resource empowers users to perform repairs and maintenance with confidence, saving time and expense.