This manual covers the Hitachi EX230LC-5 Excavator, designed for heavy-duty construction and earthmoving applications. Engineered for reliability and performance, this excavator features robust construction and advanced operational capabilities. It is equipped with ISUZU A-6BG1TQA, A-6BG1 TQA01, or HINO H07D engine options, ensuring powerful and efficient operation for demanding tasks. The EX230LC-5 model represents a commitment to quality and durability in the heavy equipment sector. The purpose of this comprehensive workshop repair service manual is to provide detailed information for the maintenance, repair, and troubleshooting of the Hitachi EX230LC-5 Excavator. It includes sections on general information, system operation, component details, operational performance testing, and troubleshooting procedures. Furthermore, it covers hydraulic and electrical circuits, wiring diagrams, and specific workshop procedures for the upperstructure, undercarriage, front attachment, and engine. This manual is an essential resource for owners, technicians, and mechanics to ensure the optimal performance and longevity of their equipment.