Book is in like new condition! The 1986 Cummins NT-855 Big Cam III IV Diesel Engine Troubleshooting Service Manual is a comprehensive guide designed for maintenance and troubleshooting of the Cummins NT-855 Big Cam III IV diesel engine. Manufactured in 1986, this manual provides detailed instructions and insights specific to this model, ensuring optimal performance and longevity. With a focus on troubleshooting common issues and offering expert service recommendations, this manual is a valuable resource for those looking to keep their heavy equipment running smoothly.