This professional technical manual provides comprehensive service, maintenance, and troubleshooting information for the Hitachi EX100 and EX100M Excavator models. Designed for durability and performance, these excavators are engineered to meet the demanding requirements of various construction and industrial applications. The manual covers all models, engines, and configurations, ensuring that users have access to the specific details necessary to operate and maintain their equipment effectively. The scope of this manual is extensive, encompassing detailed procedures for routine maintenance, in-depth troubleshooting guides for identifying and resolving issues, and essential technical specifications. It also includes critical safety guidelines to ensure the well-being of operators and technicians. By utilizing this resource, owners, mechanics, and service technicians can confidently perform necessary upkeep, repairs, and diagnostics, thereby maximizing the operational lifespan and efficiency of their Hitachi EX100 and EX100M Excavators.