This repair manual covers CNH UK Engines, specifically models F4GE0484E, F4GE0684F, F4HE0684J, F4AE0684K, and F4AE0684L. These engines are designed for robust performance and reliability in demanding applications. The manual details the overhaul procedures for both 4-cylinder and 6-cylinder variants, ensuring comprehensive support for these powerful engine platforms. The purpose of this manual is to provide detailed technical information for the maintenance, diagnosis, and repair of CNH UK Engines. It includes sections on diagnostics, engine overhauls for specific models, and electric equipment. This guide is an essential resource for technicians and mechanics seeking to maintain the optimal performance and longevity of these engines.