This Service Repair Workshop Manual provides comprehensive documentation for the Caterpillar 3500 Series engines, including models 3508, 3512, and 3516. These robust engines are engineered for demanding industrial applications, featuring water-cooled systems, turbocharged and aftercooled induction, and either mechanical or electronic fuel injection. The 3508, 3512, and 3516 variants offer V8, V12, and V16 configurations respectively, with substantial displacements ranging from 34.5 L to 69.1 L, ensuring powerful and reliable performance across a wide operational spectrum. This manual serves as an essential resource for maintaining and repairing Caterpillar 3500 Series engines. It covers critical areas such as detailed maintenance procedures, diagnostic troubleshooting, essential technical specifications, and vital safety guidelines. Owners, mechanics, and technicians will find the English-language content, spanning hundreds of pages, invaluable for ensuring the longevity and optimal performance of their equipment. The manual is designed for lifetime use, compatible with Windows and MAC operating systems, and fully printable for convenient access.