The CLARK CQ20D, CQ20L, CQ25D, CQ25L, CQ30D, and CQ30L series represent a line of robust Internal Combustion Forklifts engineered for efficient material handling. These forklifts are powered by reliable internal combustion engines, offering a range of fuel options including Diesel, Petrol, and LPG, with engine displacements varying across models. Designed for demanding operational environments, they provide a load-rated capacity between 2000-3000KG. The engineering quality of these CLARK forklifts is evident in their comprehensive systems, encompassing hydraulic, braking, steering, electrical, fuel, and structural components, all built to ensure durability and performance in material handling applications. This Workshop Service Repair Manual provides essential information for the maintenance and repair of CLARK CQ20D, CQ20L, CQ25D, CQ25L, CQ30D, and CQ30L forklifts. It covers a wide array of critical areas, including detailed maintenance schedules, specific engine maintenance procedures, and a comprehensive troubleshooting guide to address operational issues. The manual also delves into the technical specifications of various systems, such as the hydraulic, braking, steering, electrical, and fuel systems, along with details on structural components and wheel/tire systems. Its purpose is to equip owners, mechanics, and technicians with the knowledge required to effectively maintain, service, and repair these internal combustion forklifts, ensuring their continued optimal performance and longevity.