This diagnostic and repair manual covers Cummins ISX, Signature ISX, and QSX15 engines. These diesel internal combustion engines, with a displacement of 15 liters, are engineered for robust performance and reliability in demanding applications. The manual is presented in Español and comprises 722 pages, offering comprehensive guidance for the intended use of these powerful engines.

The purpose of this manual is to provide detailed diagnostic and repair procedures for Cummins ISX, Signature ISX, and QSX15 engines. It covers essential maintenance information, including details on recommended oil types, oil capacity, and recommended service intervals. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining and repairing these engines, ensuring optimal performance and longevity.