This comprehensive service and repair manual provides detailed information for the Komatsu PC128UU-1 and PC128US-1 hydraulic excavators. It covers a wide range of topics, including engine, hydraulics, electrical system, undercarriage, and more. This manual is an invaluable resource for mechanics, technicians, and owners who need to maintain, repair, and troubleshoot these excavators. The manual is organized with clear and concise instructions, detailed diagrams, and comprehensive specifications. It is an essential tool for anyone working on Komatsu PC128UU-1 and PC128US-1 hydraulic excavators.