This document provides comprehensive technical information for the Clark WP-40. Designed for robust performance, the Clark WP-40 represents a significant advancement in its class, built with a commitment to engineering excellence and long-term reliability. Its unique features are tailored to meet demanding operational requirements, ensuring efficiency and productivity in various applications. This Factory Service/Repair/Workshop Manual, code SM-611, is presented in English and offers detailed, step-by-step instructions accompanied by highly detailed exploded pictures and diagrams. Its purpose is to guide users in completing required jobs correctly and efficiently. The manual covers essential areas including maintenance, transmission, electrical, hydraulic, and frame repair procedures, empowering owners and technicians to effectively maintain and service the Clark WP-40.