This Operation & Maintenance Manual provides comprehensive information for the WA150-6 Wheel Loader, serial number 80001 and up. Engineered for demanding heavy equipment applications, this machine is designed for efficient operation, handling, lubrication, maintenance, checking, and adjustment. The manual covers essential aspects of the WA150-6, including its attachments and handling, ensuring users can maximize the performance and longevity of their equipment. This English-language manual is designed to be a complete resource for owners and technicians. It details critical maintenance procedures, including schedules, wear parts information, recommended fuels and lubricants, and standard tightening torques. Furthermore, it covers periodic replacement of safety-critical parts, transportation procedures, cold-weather operation, long-term storage, and troubleshooting guidance, all supported by extensive pictorial content for clarity.