This hydraulic pump is designed for use with Caterpillar (CAT) 9M0222 equipment. It is compatible with various track-type tractors and loaders, including 6A, 6S, 55, D6E, D6G, 4 D6G2, XL 153, D6C, D6D, D6G2 LGP, and 163 models. This high-quality aftermarket pump is perfect for those in need of reliable replacement parts for their CAT equipment.