This manual pertains to the Komatsu PC45-1, a robust piece of equipment designed for demanding applications. Engineered for reliability and performance, this model features a powerful Komatsu 4D84-2 diesel engine with a displacement of 2.734 liters and an approximate power output of 37.4 hp. Its hydrostatic transmission and 4-wheel drive system ensure efficient power delivery and maneuverability, making it suitable for a wide range of construction and industrial tasks. With an operating weight of 4200 kg and a bucket capacity of 0.16 m³, the PC45-1 is built to handle significant workloads. This comprehensive workshop and operation manual, provided in English, offers detailed guidance for maintaining and repairing the Komatsu PC45-1. It covers essential areas including lubrication capacities, coolant capacity, fuel tank capacity, and hydraulic system specifications. The manual includes specific procedures for the Komatsu 4D84-2 engine, along with troubleshooting information and technical data. Its purpose is to equip owners, mechanics, and technicians with the knowledge necessary to ensure the optimal performance, longevity, and safety of the PC45-1.