This manual covers the Komatsu PC128UU-2, a robust tracked excavator from the UU Series. Engineered for demanding construction and earthmoving applications, this machine is designed for reliability and efficient operation. Its compact design, combined with a hydrostatic transmission and a likely diesel engine, makes it a versatile tool for various job sites. The PC128UU-2 is built to deliver consistent performance and durability, ensuring it meets the rigorous standards expected in its class. This comprehensive Full Service Repair Manual provides essential information for maintaining and repairing the Komatsu PC128UU-2. It includes detailed procedures for repair and maintenance, troubleshooting guidance for common issues, and technical specifications. This manual is an indispensable resource for owners, operators, and service technicians, enabling them to keep the equipment in optimal working condition and ensure its longevity and performance.