This manual provides comprehensive service information for the Hitachi EX 100 3. Designed for mechanical technicians, it assumes a foundational understanding of general automotive practices while emphasizing the specific aspects of the Hitachi EX 100 3. The manual aims to equip users with the knowledge to perform repairs and overhauls, ensuring the continued quality and performance of the vehicle. It includes details on proprietary components, guiding technicians to understand their functions and overall system performance. The purpose of this manual is to serve as a complete guide for maintaining and repairing your Hitachi EX 100 3. It covers a wide range of topics, including routine maintenance, diagnostic procedures, and detailed repair instructions for various systems such as the fuel, ignition, lubrication, electrical, and exhaust systems, as well as engine and transmission overhauls. The manual also highlights important safety information and the use of special tools, empowering owners and technicians to perform work efficiently and effectively, much like a professional.