This workshop manual is the definitive resource for servicing and repairing Detroit Diesel Series 60 engines, encompassing both diesel and natural gas-fueled variants utilized in on-highway applications. It provides comprehensive guidance on all aspects of engine maintenance and repair, reflecting the engineering quality and reliability expected of Detroit Diesel products. The manual is designed to be the ultimate reference for technicians working with these robust engines. The scope of this manual is extensive, covering general engine information, detailed procedures for all major engine components, and specific sections on the fuel, lubrication, cooling, exhaust, and electrical systems. It also includes references for troubleshooting electronic control systems. This manual is intended to empower owners, mechanics, and technicians with the knowledge and step-by-step instructions necessary to effectively maintain, diagnose, and repair their Detroit Diesel Series 60 engines, ensuring optimal performance and longevity.