END FACE SEAL WITH SACRIFICIAL WEAR-IN EXCLUDER

摘要

An end face seal especially adapted for use in severe service environments such as for sealing track pins or track rollers of crawler type tractors. The seal includes a primary annular seal ring (12), having a radially extending flange portion (54), as well as a secondary annular sealing ring (14) positioned in use about the axial flange portion. The secondary seal ring includes an abradable auxilliary excluder type lip (90) that contacts a portion of the machine part with the mating surface so as to initially exclude grit from the seal band area of contact between the seal ring and the machine part.