This manual covers the Komatsu 3 Series Wheel Loaders, including models WA65-3, WA65-3 Parallel Lift, WA75-3, WA85-3, WA90-3, and WA95-3. These versatile machines are engineered for robust performance and reliability in various construction and material handling applications. Featuring powerful diesel engines with displacements ranging from approximately 3.3 L to 5.5 L and power outputs between 50 HP and 90 HP, they are equipped with either a Hydrostatic Transmission (HST) or Power Shift transmission and 4WD for optimal traction. Notable features include the option of a Parallel Lift system on specific variants and ROPS/FOPS certified cabs or open operator stations, ensuring operator safety and productivity. This Workshop Service Repair Manual provides comprehensive guidance for the maintenance, repair, and technical understanding of the Komatsu 3 Series Wheel Loaders. It details essential procedures, including lubrication specifications, maintenance intervals for engine oil and hydraulic oil, and technical data. The manual serves as an indispensable resource for owners, mechanics, and technicians, offering detailed information on troubleshooting, system diagnostics, and component overhauls. With coverage extending to specific serial number ranges for each model, this English-language digital manual ensures accurate and effective upkeep of your equipment.