This manual covers the HITACHI ZAXIS ZX 135US-3, 135USK-3, and 135USL-3 excavators. These machines are engineered for robust performance and reliability in demanding construction environments. Their design emphasizes efficiency and operator comfort, making them suitable for a wide range of earthmoving and material handling applications. The HITACHI ZAXIS series is recognized for its advanced hydraulic systems and durable construction, ensuring long-term operational effectiveness and value.

The purpose of this comprehensive service manual is to provide detailed guidance for the maintenance, repair, and technical understanding of your HITACHI excavator. It includes essential information on routine maintenance schedules, diagnostic procedures, troubleshooting common issues, and step-by-step repair instructions. This resource is invaluable for owners, operators, and service technicians seeking to ensure optimal performance, longevity, and safety of the equipment.