The Komatsu PC09-1 is a compact mini excavator designed for efficient operation in confined spaces. Built with Komatsu's renowned engineering quality and reliability, this model features a hydrostatic transmission and joystick controls for precise maneuverability. Its compact dimensions, typically under one meter wide and weighing approximately 1000 kg, make it ideal for landscaping, demolition, and construction tasks where access is limited. The PC09-1 is powered by Komatsu diesel engines from the 68E through 88E series, known for their dependable performance. This shop manual provides comprehensive guidance for maintaining and repairing the Komatsu PC09-1, serial numbers 10001 and up. It covers essential systems including hydraulics, powertrain, electrical components, undercarriage, and operator controls. Detailed procedures, technical specifications, and safety guidelines are included to assist owners, mechanics, and technicians in ensuring optimal performance and longevity of the equipment. The manual also references information for the included Komatsu engine manual, covering engine oil and hydraulic oil capacities and service intervals.