This manual provides comprehensive service and repair information for the Hino RB145 W04D W04T engine. Designed for both experienced mechanics and do-it-yourself enthusiasts, it offers detailed instructions to ensure the proper functioning and longevity of your engine. The Hino RB145 W04D W04T engine is known for its robust engineering and reliability, making it a dependable choice for various applications. This guide will help you maintain its performance and address any issues that may arise. The scope of this manual covers all essential aspects of engine maintenance and repair. It includes detailed procedures for disassembly and assembly, engine identification, general precautions, and a maintenance checklist. Furthermore, it provides specific guidance on the fuel system, cooling system, exhaust system, and electrical components, including the alternator and regulator. Troubleshooting sections, servicing specifications, and tightening torques are also included, offering a complete resource for diagnosing and resolving problems, ensuring your Hino RB145 W04D W04T engine remains in optimal condition.