This service repair manual covers CLARK forklifts, including models SF12-20SD/L/G, SF15-20SLC, CMP15-20SD/L/G, and CMC15-20SL. These forklifts are engineered for demanding industrial applications, offering robust performance and reliability. This manual provides comprehensive information to ensure optimal operation and longevity for your CLARK equipment, designed for maintenance, assembly, disassembly, and servicing. The purpose of this English-language manual is to provide detailed guidance for the maintenance and repair of CLARK forklifts. It includes extensive sections on general information, specifications, engine details for LPG/Gasoline (MMC 4G63) and Diesel (YANMAR 4TNE 88, 4TNV88/94L) variants, transaxle, steering, brakes, hydraulics, mast, upright, counterweight, and circuit diagrams. With real photo illustrations, schemes, and diagrams, this manual is an essential resource for owners, technicians, and mechanics.