This manual covers the Clark WP-40, a robust piece of industrial equipment designed for demanding operational environments. While specific production years are not detailed, the WP-40 is engineered for reliability and efficiency, reflecting a commitment to quality in its construction and performance. Its design prioritizes durability and ease of operation, making it a valuable asset for various material handling tasks. The purpose of this comprehensive Factory Service/Repair/Workshop Manual, identifier SM-560, is to provide detailed guidance for the maintenance and repair of the Clark WP-40. It includes information on scheduled maintenance programs, component-specific servicing such as battery, drive motor, pump motor, contactor panel, drive unit, wheels and tires, brakes, and lift mechanisms, as well as machine jacking and blocking. Furthermore, the manual offers diagnostic procedures, troubleshooting steps, and technical specifications, all presented with highly detailed exploded pictures and diagrams to assist owners, mechanics, and technicians in effectively maintaining and repairing the equipment.