This manual pertains to the NEW HOLLAND CNH U.K. ENGINES F4BE0454B, F4BE0484D, F4BE0484E, F4BE0684B, and F4BE0684M, designed for use with the MH2.6, MH3.6, MH4.6, and MH PLUS C models. These engines are integral components of robust machinery engineered for demanding applications, reflecting New Holland's commitment to durability and performance. The comprehensive documentation provided ensures that users have access to the detailed information necessary for optimal operation and longevity of these powerful engines. This workshop service and repair manual offers an exhaustive guide for technicians, mechanics, and owners. It covers a wide array of essential topics, including general maintenance, troubleshooting procedures, detailed engine and transmission service, brake system repair, electrical system diagnostics, and wiring diagrams. Furthermore, it provides information on suspension, steering, cooling systems, fuel injection and systems, emission controls, and HVAC systems, ensuring complete coverage for the upkeep and repair of the specified New Holland engines and associated machinery.