This workshop service repair manual covers the Clark CQ 20/25/30 D/L forklifts, part of the CQ230 series. These robust machines are engineered for demanding industrial environments, offering reliable performance and efficient operation. The forklifts are available with either a Diesel Engine or a 4G64 LPG/GAS engine, featuring a MI-07 LPG System (Tier 3) for specific models. Their design emphasizes durability and ease of maintenance, making them a dependable choice for material handling needs. This comprehensive manual provides detailed information essential for the upkeep and repair of your Clark forklift. It includes in-depth procedures for the engine, transmission, drivetrain, brakes, steering, and hydraulic systems, covering components such as the engine cooling system, fuel system, induction/exhaust system, transaxle, steer axle, brake/inching system, steering column, hydraulic sump, control valve, and tilt cylinders. Additionally, the manual details the chassis, uprights, counterweight, wheels, tires, and the overall electrical system, ensuring that owners and technicians have the resources needed to maintain optimal performance and longevity.