This comprehensive service and repair manual provides detailed technical information and instructions for Komatsu PC340-6K, PC340LC-6K, and PC340NLC-6K hydraulic excavators with serial numbers K32001 and up, and K34001 and up. It serves as an invaluable resource for technicians and mechanics, offering in-depth guidance on maintenance, troubleshooting, and repair procedures. The manual covers a wide range of topics, including engine, hydraulics, electrical systems, undercarriage, and cab components. It features detailed diagrams, illustrations, and step-by-step instructions, ensuring clarity and ease of use. This manual is essential for anyone involved in servicing and maintaining these excavators, enabling them to perform repairs efficiently and effectively.