This manual covers the CAT Caterpillar GC series forklifts, including models GC35K, GC40K, GC40K STR, GC45K SWB, GC45K, GC55K, GC55K STR, GC60K, GC70K, and GC70K STR. These forklifts are engineered for a wide range of material handling applications, offering robust performance and reliability. They are available with Propane (LPG) or Dual Fuel (LPG/Gasoline) engine options, and feature automatic transmissions, likely hydrostatic or torque converter based. Lifting capacities range from approximately 3500 to 7000 kg, with various mast types, including duplex and triplex, and optional features like side shifters to enhance versatility. This comprehensive workshop service repair manual in English provides essential information for maintaining and repairing your CAT Caterpillar forklift. It details crucial procedures for scheduled maintenance, including typical service intervals, and covers fluid capacities for the engine, hydraulic system, and transmission. The manual also includes technical specifications, safety guidelines, and troubleshooting advice. By following the instructions within this manual, owners and technicians can ensure the optimal performance, longevity, and safe operation of their GC series forklift.