Industrial 66487C91 Seal

66487C91 Brake Disc Seal Kit is an aftermarket replacement set designed to service the brake piston housing on International/CaseIH Hydro 100-series equipment and related industrial Case IH tractors. This complete kit is intended for one side and is compatible with Hydro 100 and a broad range of models, including 706, 756, 766, 806, 826, 856, 966, 1026, 1066, 1206, 1256, 1456, 1466, and 1468. It replaces the OEM 66487C91 and ships as a four‑piece seal/O‑ring kit for brake components. Contents include 530789R1 O‑ring for the brake piston housing; 530807R2 O‑ring for the piston outer; an inner piston O‑ring; and 530806R91 seal for the piston housing, providing the essential seals needed to maintain hydraulic integrity and proper braking function in Hydro 100‑era machines and related tractors. This kit is commonly used in brake maintenance and rebuilds where restoring seal integrity is required to prevent leaks and ensure reliable braking performance.