The Caterpillar GC35K/GC40K/GC45K/GC55K/GC60K/GC70K Forklift series represents a robust line of material handling equipment designed for demanding industrial applications. These forklifts are engineered for reliability and efficiency, featuring internal combustion engines that likely operate on propane/LPG or gasoline, with displacements typically ranging from 2.0L to 2.5L and power outputs around 40-60 HP. With automatic transmissions and a capacity range of 3500 to 7000 lbs, they are built to handle substantial loads in various operational environments. Standard safety features such as an operator presence system and an overhead guard are integrated to ensure operator and site safety. This service and repair manual provides comprehensive guidance for the maintenance and servicing of the Caterpillar GC35K/GC40K/GC45K/GC55K/GC60K/GC70K Forklift models. It covers essential information including detailed maintenance procedures, lubrication requirements, troubleshooting diagnostics, and technical specifications for engines, transmissions, and other critical systems. By following the instructions and schedules outlined within, owners, mechanics, and technicians can effectively maintain the performance, longevity, and safety of their equipment, ensuring optimal operational uptime and minimizing the risk of unexpected failures.