The McCormick 3661228M91 hydraulic pump is an essential component designed for various agricultural tractor models, including McCormick CX series, Massey Ferguson, Valtra, and Case IH CX series. This genuine OEM-quality pump ensures efficient and reliable hydraulic system operation, providing consistent fluid flow and pressure for demanding tasks. It features a right-hand rotation, 13-tooth shaft, and specific inlet/outlet thread sizes for precise fitment and optimal performance.