This Service Repair Manual covers the Komatsu WA150PZ-5 Wheel Loader, identified by serial number prefix H50051 and up. Designed for robust performance and reliability, this machine embodies Komatsu's commitment to engineering excellence in heavy equipment. Its versatile application makes it a valuable asset for various operational needs, reflecting a focus on durability and efficient functionality in demanding environments. This manual provides comprehensive service and repair instructions, covering general information, structure and function, testing and adjusting, disassembly and assembly, maintenance standards, and other critical areas. It is intended to assist owners, mechanics, and technicians in maintaining the optimal performance and longevity of their WA150PZ-5 Wheel Loader through detailed procedures and technical specifications.