This manual covers the Hitachi EX230LC-5, EX270-5, and EX270LC-5 Excavator models. These excavators are engineered for demanding work environments, offering robust performance and reliability. The comprehensive information within this guide ensures that owners and operators have access to the same detailed knowledge utilized by professional technicians, facilitating efficient operation and upkeep of these powerful machines. The purpose of this workshop repair service manual is to provide complete diagnostic, repair, and maintenance information. It includes detailed procedures, technical specifications, troubleshooting guides, and circuit diagrams for hydraulic and electrical systems. This resource is designed to assist owners, mechanics, and technicians in performing all necessary maintenance and repairs, ensuring the longevity and optimal performance of the Hitachi EX230LC-5, EX270-5, and EX270LC-5 Excavators.