This manual provides comprehensive service and repair information for the Hino H07D and H07C-T diesel engines. These engines, including the 7.4L 6-cylinder inline Hino H07D and the turbocharged 6.7L 6-cylinder inline Hino H07D, are known for their robust engineering and reliability. This document is designed to be the definitive resource for maintaining and troubleshooting these powerplants, mirroring the information used by professional technicians. The purpose of this workshop manual is to equip owners, mechanics, and technicians with the detailed knowledge required for effective maintenance and repair. It covers a wide array of topics, including general information, specifications, tightening torques, lubricants, engine overhaul procedures, and detailed breakdowns of various engine systems such as the lubrication, fuel, cooling, air intake, and exhaust systems. Additionally, it provides guidance on engine tune-ups, troubleshooting, and electrical system diagnostics, complete with diagrams and step-by-step instructions to ensure optimal performance and longevity of the Hino H07D and H07C-T engines.