This service manual covers the HITACHI ZAXIS 330-3, 330LC-3, 350H-3, 350LCH-3, 350LCK-3, 350LC-3, and 350LCN-3 excavators. These machines are engineered for demanding construction and industrial applications, offering robust performance and durability. Their design prioritizes efficiency and operational reliability, making them a trusted choice for heavy-duty tasks. This comprehensive manual provides essential information for the maintenance, repair, and troubleshooting of your HITACHI excavator. It details critical procedures, technical specifications, and safety guidelines, serving as an indispensable resource for owners, mechanics, and technicians. By following the instructions within this manual, you can ensure optimal performance and longevity of your equipment.