This manual provides comprehensive service and repair information for the EX270-5 Excavator, equipped with ISUZU A-6BG1TQA, A-6BG1 TQA01, or HINO H07D engines. Designed to guide users through maintenance and repair procedures, this factory manual covers all aspects of the machine, from general information and system overviews to detailed component operations and operational performance tests. It is an essential resource for ensuring the longevity and optimal performance of your EX270-5 Excavator. The scope of this manual encompasses critical areas including troubleshooting, hydraulic and electrical circuit diagrams, harness information, and detailed workshop procedures for the upperstructure, undercarriage, front attachment, and engine. With step-by-step instructions, detailed illustrations, and diagnostic guides, this manual empowers owners and technicians to perform all necessary maintenance, repairs, and rebuilding tasks. It is structured to facilitate easy navigation and printing of specific sections or the entire document, making it an indispensable tool for any owner or professional mechanic.