The McCormick 4215015M91 is a genuine OEM hydraulic pump seal kit designed to restore optimal sealing performance in various McCormick, Landini, and Massey Ferguson agricultural tractors. This essential kit ensures reliable operation of the hydraulic system, preventing leaks and maintaining pressure. It is a direct replacement for original equipment, offering precise fitment and durability. Also cross-references to Massey Ferguson part number 3540260M91 and Landini 4215015M91.