This document provides comprehensive information for the Komatsu PC128UU-2, a robust piece of equipment designed for demanding work. Engineered for reliability and performance, this model features a powerful Komatsu diesel engine and a hydrostatic transmission, making it suitable for a wide range of construction and excavation applications. Its substantial operating weight of approximately 12,740 kg (28,090 lbs) underscores its capability for heavy-duty tasks. This Workshop Service Repair Manual is your essential guide for maintaining and repairing the Komatsu PC128UU-2. It covers critical operational procedures, detailed technical specifications, and essential safety guidelines. By following the instructions within this manual, owners, mechanics, and technicians can ensure optimal performance, longevity, and safe operation of the equipment.