This workshop service manual covers Caterpillar 3508, 3512, and 3516 industrial engines. These engines are part of the robust 3500 Series, known for their reliability and performance in demanding applications. The 3508 features a V-8 cylinder configuration with direct injection and a displacement of 34.5 liters, while the 3512 offers a V-12 configuration with 51.8 liters, and the 3516 a V-16 configuration with 69.1 liters. Engineered for industrial use, these engines are built to deliver consistent power and durability. This comprehensive manual provides detailed instructions and technical specifications essential for maintaining and repairing your Caterpillar engines. It covers a wide range of systems, including fuel, air induction, exhaust, lubrication, cooling, electrical, and starting systems, as well as turbocharger and control systems like the lever governor and fuel ratio control. You will find in-depth guidance on troubleshooting, engine testing, adjustment, disassembly, and assembly, along with important documentation such as wiring diagrams and tightening torques. This resource is designed to assist both DIY enthusiasts and experienced mechanics in keeping their engines in optimal working condition efficiently and cost-effectively.