The Case IH 87558952 is a genuine OEM radiator cap designed to maintain the correct pressure within the cooling systems of various Case IH and New Holland agricultural machinery. This essential component helps prevent coolant boil-over and ensures efficient engine cooling. It is a direct replacement part for models including Case IH JXU series (JXU75, JXU85, JXU95, JXU105, JXU115) and Compact Farmall B series (Farmall 30B, 35B, 40B, 45B, 50B, 55B), as well as New Holland T4000, T5000, and TD5 series tractors. This cap is crucial for the longevity and performance of your machine's cooling system.