This manual covers the Clark CMP Series, including models CMP 15, CMP 18, CMP 20, CMP 25, and CMP 30. These industrial vehicles are engineered for reliability and performance in demanding operational environments. They are designed to handle a variety of material handling tasks with robust construction and efficient power trains, offering dependable service for various applications. The purpose of this Service Repair Manual is to provide comprehensive guidance for the maintenance, repair, and troubleshooting of the Clark CMP Series. It details procedures for engine systems, including LPG and Diesel options, transmission overhauls, cooling, fuel, ignition, and electrical systems. Additionally, it covers brake, steering, hydraulic systems, uprights, and wheel and tire services, along with essential maintenance schedules and safe operating practices.