The Case IH 3156792R1 is a genuine OEM radiator cap designed to maintain optimal cooling system pressure at approximately 89.63 kPa (13 PSI). This essential component ensures efficient engine temperature regulation and prevents coolant loss. It is compatible with a wide range of Case IH tractor models, including the 385, 485, 585, 685, 885, 995, 3220, 3230, 4210, 4230, 4240, 5120, 5130, 5140, 5220, 5230, 5240, 5250, CX100, CX50, CX60, CX70, CX80, CX90, MX100, MX110, MX120, MX135, MX150, MX170, MX80C, and MX90C series.