This manual provides comprehensive information for the DEUTZ TD/TCD 2012 L04/06 2V/m and TCD 2013 L04/06 2V/m engines. These engines are designed for robust performance and reliability, incorporating advanced engineering to meet demanding operational requirements. This document details their construction, operational procedures, and essential care to ensure optimal functionality and longevity. The scope of this manual covers all critical aspects of engine management, including general descriptions, operational guidelines, fluid specifications, detailed maintenance schedules, and troubleshooting procedures for common faults. It also includes essential technical data and precautions for transport and storage. This resource is intended for owners, operators, and service technicians, offering the necessary knowledge to maintain, inspect, and operate the DEUTZ engines safely and efficiently.