This Service Repair Manual provides comprehensive information for the Clark WP-40 Forklift. Engineered for reliability and efficiency, the WP-40 is designed to meet the demands of various industrial applications. Its robust construction and advanced features ensure optimal performance in maintenance, assembly, disassembly, servicing, and repair operations. This manual details the specific components and operational aspects of the WP-40, offering insights into its sophisticated design and intended use. The purpose of this manual is to serve as an indispensable resource for maintaining and repairing the Clark WP-40 Forklift. It covers a wide array of topics, including detailed maintenance procedures for key systems such as the electric motor, lift pump motor, drive motor, contactor panel, drive unit, wheels and tires, brake system, hydraulic unit, and lift linkage. Additionally, the manual includes information on general maintenance, scheduled maintenance programs, battery care, machine jacking and blocking, and user safety practices. Technical specifications and troubleshooting guidance are also provided, making this manual essential for owners, mechanics, and technicians.