The McCormick 6634321A1 water pump is a genuine OEM assembly designed for various McCormick C, CX, and T series tractors. This essential component ensures efficient coolant circulation, preventing engine overheating and maintaining optimal operating temperatures. It is a direct replacement for original part numbers including Case IH 3136117R91 and Perkins U5MW0106, guaranteeing a precise fit and reliable performance for your agricultural machinery. Compatible with models such as C100, C105, C110, C50, C60, C70, C80, C90, CX100, CX105, CX110, CX50, CX60, CX70, CX75, CX80, CX85, CX90, CX95, T100, T105, T110, T50, T60, T70, T80, and T90.