The Caterpillar GP40 / GPL40 forklift is a robust and reliable material handling machine designed for efficient operation in various industrial environments. Powered by a gasoline or LPG fuel system, these forklifts are engineered for durability and performance, featuring a Nissan H25 engine with a displacement of 2.5 liters and an approximate power output of 65 HP. They are equipped with a two-speed forward and one-speed reverse automatic torque converter transmission, capable of lifting loads up to 4000 lbs (1800 kg). The engineering quality of these machines ensures consistent operation and a long service life for demanding applications. This Service Repair Manual provides comprehensive guidance for the maintenance, repair, and technical understanding of the Caterpillar GP40 / GPL40 forklift. It covers essential areas including detailed maintenance schedules, fluid capacities and types for the engine, transmission, and hydraulic systems, as well as technical specifications for performance and electrical components. The manual is intended to assist owners, technicians, and mechanics in performing routine service, diagnosing issues, and executing repairs, ensuring the continued optimal performance and longevity of the forklift.