This manual covers the Hino W04D and W04C-T diesel engines, as well as the RB145 series vehicle chassis, transmission, and electrical systems. The W04D engine is a 4.009L, 4-cycle, 4-cylinder, in-line, water-cooled, direct injection diesel. The W04C-T engine is a 3.839L, 4-cycle, 4-cylinder, in-line, water-cooled, direct injection, turbocharged diesel. The LE05S series transmission features 5 forward speeds and 1 reverse, with synchromesh on gears 2 through 5 and constant mesh on 1st and reverse gears. This comprehensive guide is intended for US Marine Power inboard engines and Hino RB145 series buses. This workshop service manual provides detailed information for the maintenance and repair of these Hino engines and RB145 series vehicles. It includes sections on general information, engine systems, turbocharger, fuel injection, lubrication, cooling, and troubleshooting. Additionally, it covers clutch and transmission systems, propeller shaft, axles, steering, brakes, wheels, tires, suspension, chassis frame, and electrical equipment. This manual is designed to assist professional mechanics and owners in performing repairs and servicing, ensuring the continued reliability and optimal performance of the vehicle.