This Service Repair Workshop Manual covers the Komatsu WA600-3 and WA600-3D WA 600 Avance Wheel Loaders, designed for demanding heavy-duty applications. These machines are engineered for robust performance and reliability, featuring articulated frame steering and a 4WD power-shift transmission system. The Komatsu WA600 series is built to handle significant workloads, with an approximate operating weight of 20,000-25,000 kg and a standard bucket capacity typically ranging from 3.5 to 5.0 m³. These wheel loaders are equipped with operator safety features such as a ROPS/FOPS cab, ensuring a secure working environment. This comprehensive manual, presented in English and exceeding 1100 pages, provides detailed information essential for the maintenance and repair of your Komatsu WA600-3 or WA600-3D. It includes in-depth procedures for routine maintenance, lubrication schedules, and filter replacement, alongside critical troubleshooting guides with diagnostic codes and system checks. Technical specifications, fluid type recommendations, and operational details are thoroughly covered, empowering owners, mechanics, and technicians to effectively service and maintain the machine, ensuring its optimal performance and longevity.