This manual covers Hino W04D and W04C-T diesel engines, as well as RB145 series vehicles. The W04D engine is a 4.009L, 4-cycle, 4-cylinder, in-line, water-cooled, direct injection unit. The W04C-T engine is a 3.839L, 4-cycle, 4-cylinder, in-line, water-cooled, direct injection, turbocharged diesel engine. The manual also details the LE05S series transmission, featuring 5 forward speeds and 1 reverse with synchromesh on gears 2 through 5, and constant mesh on 1st and reverse. This comprehensive guide is designed for US Marine Power inboards and Hino RB145 series buses. This workshop service manual provides detailed information for the maintenance and repair of the specified Hino engines and RB145 series vehicles. It includes sections on general information, engine systems, turbocharger, fuel injection, lubrication, cooling, clutch, transmission, drivetrain components, steering, braking systems, suspension, chassis, and electrical equipment. The manual is intended for both owners and professional technicians, offering step-by-step instructions, diagrams, and troubleshooting guidance to ensure optimal performance and longevity of the vehicle.