This manual covers the Hitachi EX270-5 Excavator, a robust piece of equipment designed for demanding operational tasks. Engineered for reliability and performance, the EX270-5 features advanced systems and components, including ISUZU A-6BG1TQA, A-6BG1 TQA01, and HINO H07D engine options. Its construction emphasizes durability and efficiency, making it a trusted choice for various construction and industrial applications. This comprehensive guide provides the detailed information necessary to understand and maintain this powerful excavator. The purpose of this service repair workshop manual is to provide detailed instructions for the maintenance, troubleshooting, and repair of the Hitachi EX270-5 Excavator. It includes step-by-step procedures, diagrams, illustrations, wiring schematics, and technical specifications covering general information, system operations, component details, performance testing, and troubleshooting. The manual is designed for both owners with basic mechanical knowledge and professional technicians, offering the same information used by authorized service departments to ensure the vehicle is kept in optimal working condition.