This Shop Service Repair Manual for the Komatsu WA320-5L Series provides comprehensive information for this robust machine. Engineered for reliability and performance, the WA320-5L is designed to handle demanding tasks, featuring a powerful diesel engine with an injection pump fuel system and a water coolant pump, radiator, and oil cooler setup. Its drivetrain includes a power train transmission, drive shaft, axles, differential, and final drive, ensuring efficient power delivery. The machine is equipped with essential components such as hydraulic systems, electrical systems, and a comfortable operator station, all contributing to its operational excellence. This manual serves as an indispensable resource for maintaining and repairing the Komatsu WA320-5L. It covers a wide range of topics including detailed maintenance procedures, preventative maintenance schedules, and troubleshooting guidance. Technical specifications, electrical diagrams, and in-depth coverage of all major systems, from the engine and transmission to hydraulic and braking systems, are included. Step-by-step instructions, accompanied by detailed illustrations, exploded diagrams, and photos, facilitate the removal and installation of components, as well as testing and adjustments, ensuring that owners, mechanics, and technicians can effectively manage the upkeep of their equipment.