This manual covers the Komatsu WA180-3 Avance Wheel Loader and WA180-3PTC Parallel Tool Carrier, part of the WA180-3 Series. These machines are engineered for robust performance and reliability, featuring a powerful Komatsu SAA4D102E-2 diesel engine producing approximately 121 HP, coupled with a 4-speed powershift transmission. With an operating weight of 10,000-11,000 kg and a bucket capacity ranging from 1.5 to 2.0 m³, they are designed for demanding tasks in various operational environments. Notable specifications include a 4.5-liter engine displacement, a 150-liter fuel tank capacity, and a rated operating capacity of 3500 kg, highlighting their capability and efficiency in construction and material handling applications. The Service Repair Workshop Manual provides comprehensive guidance for maintaining and repairing your Komatsu WA180-3 Series equipment. It details essential procedures for engine oil and hydraulic oil changes, specifying intervals and capacities for optimal performance. This manual includes technical specifications for all major systems, including the powertrain, hydraulics, and cooling system, along with information on dimensions and axle types. Safety guidelines and troubleshooting steps are also covered, empowering owners, mechanics, and technicians to ensure the longevity and proper functioning of their wheel loader or parallel tool carrier through accurate and detailed instructions.