This manual covers the Hitachi Zaxis-2 Series compact excavators, including the Zaxis 27U-2, 30U-2, and 35U-2 models. These diesel-powered machines are engineered for reliability and performance in a variety of construction and landscaping applications. Featuring a hydrostatic transmission and 4WD drivetrain, they offer robust operational capabilities. The Zaxis-2 Series is designed with operator comfort and safety in mind, offering ROPS/FOPS compliant cabins or open canopies and standard auxiliary hydraulic circuits for versatile attachment use. The purpose of this comprehensive Service Repair Manual is to provide detailed information for the maintenance, repair, and troubleshooting of your Hitachi Zaxis-2 Series excavator. It includes essential technical specifications, maintenance schedules, fluid capacity details, and procedures for routine servicing, such as engine oil and air filter changes. This manual is an indispensable resource for owners, technicians, and mechanics, enabling them to ensure the optimal performance, longevity, and safe operation of their equipment through accurate and efficient service practices.