This service repair workshop manual covers the Clark WP-40. Designed for reliable operation, this model represents a commitment to robust engineering and efficient performance. Its intended usage is supported by a focus on durability and operational excellence, ensuring it meets the demands of its application. This comprehensive manual provides essential information for maintaining and repairing the Clark WP-40. It includes detailed procedures for scheduled maintenance, battery service, and repairs to the electric motor, pump motor, drive motor, contactor panel, and drive unit. Coverage extends to the drive system, including direction and accelerator control, as well as chassis components such as wheels, tires, brakes, and the lift mechanism. Information on machine jacking and blocking, along with truck data and specifications, is also included to ensure thorough understanding and effective service.