This manual provides comprehensive guidance for the Deutz 914 Engine, a robust and reliable power unit designed for demanding applications. Engineered for durability and performance, the Deutz 914 Engine is a testament to advanced manufacturing and operational efficiency. Its design prioritizes longevity and ease of maintenance, making it a trusted choice for various industrial and commercial uses. This document serves as an essential resource for understanding and operating this high-quality engine. The scope of this manual is extensive, covering all critical aspects of the Deutz 914 Engine's lifecycle. It includes detailed sections on general information, engine description, operation, operating media, routine maintenance, and comprehensive service procedures. Furthermore, it offers valuable troubleshooting guidance for identifying and resolving faults, alongside information on engine preservation and detailed technical specifications. This manual is designed to empower owners, technicians, and mechanics with the knowledge necessary for effective operation, maintenance, and repair, ensuring the optimal performance and longevity of the Deutz 914 Engine.