The New Holland 87311822C is a genuine remanufactured core for a hydraulic pump. This core is required for the exchange program when purchasing a remanufactured New Holland pump, ensuring proper credit for the returned used component. It corresponds to the original New Holland part number 87311822, which is a hydraulic pump used in various New Holland T8 and T9 series tractors. Returning a suitable core is crucial for the remanufacturing process, reducing waste and providing cost-effective replacement options for models like T8.275, T8.300, T9.390, and T9.700.