This workshop service repair manual covers the Caterpillar (CAT) DP80-DP150 Series Forklifts, equipped with the 6D16 Diesel engine. These robust machines are engineered for demanding industrial applications, offering reliability and performance across various operational environments. The manual encompasses all production years for these forklift models, focusing on detailed procedures for the engine and the forklift series as a whole. This comprehensive English-language manual provides an A-Z guide for maintaining and repairing your CAT forklift. It includes detailed information on scheduled maintenance, engine oil and cooling system specifics, fuel system requirements, and filter replacement procedures. Furthermore, the manual offers step-by-step diagnostic procedures and troubleshooting guidance for fault codes, ensuring that owners, mechanics, and technicians have the necessary resources to keep these powerful machines operating at peak efficiency.