This manual covers the Komatsu WA450-3LL Wheel Loader, a robust piece of equipment designed for demanding operational environments. Engineered for reliability and performance, this model features a powerful Komatsu SAA6D125E-2 diesel engine producing up to 197 kW (264 HP) gross power, coupled with a 4-speed forward and 4-speed reverse Power Shift transmission. Its substantial operating weight of 22285 kg (49130 lbs) and a bucket capacity of 4.0 m³ (5.2 yd³) make it suitable for heavy-duty material handling tasks. The comprehensive specifications provided detail its dimensions, fluid capacities, and tire specifications, highlighting its advanced design and operational capabilities. The purpose of this full service repair manual is to provide detailed information for the maintenance, repair, and servicing of the Komatsu WA450-3LL Wheel Loader. It includes essential procedures for rebuilding, refurbishing, and restoration, alongside diagnostic information and service schedules. This guide also contains crucial technical specifications, wiring diagrams, and safety guidelines, ensuring that owners, mechanics, and technicians have the necessary resources to maintain the vehicle's optimal performance and longevity.