An outer seal assembly (1100, 1100') for a thrust bearing assembly, the outer seal assembly (1100, 1100') comprising: a flexible outer annular ring (1101, 1101') extending between a first outer end (1100A, 1100A') and a second outer end (1100B, 1100B') and having a radially inward-opening C-shaped cross section comprising: (a) an anchor leg (1100X, 1100X') extending radially inward proximate the first outer end (1100A, 1100A'), the anchor leg (1100X, 1100X') being configured to secure the outer annular ring (1101, 1101') to an outer receiving area (731G1, 731G1') of a rotatable thrust plate of the thrust bearing assembly; (b) a flexible neck (1100N, 1100N') extending between the first outer end (1100A, 1100A') and the second outer end (1100B, 1100B'); and (c) a sealing leg (1100Y, 1100Y') extending radially inward proximate the second outer end (1100B, 1100B'); and a sliding ring (1100R, 1100R') having a pocket (1100P, 1100P') formed therein, the sealing leg (1100Y, 1100Y') being secured in the pocket (1100P, 1100P'), the sliding ring (1100R, 1100R') comprising a lubricious material and being configured to slide in a groove (1100G1, 1100G1') of a stationary thrust plate (732, 732') of the thrust bearing assembly and at least one of the sealing leg (1100Y, 1100Y') and the pocket (1100P, 1100P') tapers to improve retention of the sealing leg (1100Y, 1100Y') within the groove (1100G1, 1100G1') during rotation of the sliding ring (1100R, 1100R') within the stationary thrust plate (732, 732'). a flexible outer annular ring (1101, 1101') extending between a first outer end (1100A, 1100A') and a second outer end (1100B, 1100B') and having a radially inward-opening C-shaped cross section comprising: (a) an anchor leg (1100X, 1100X') extending radially inward proximate the first outer end (1100A, 1100A'), the anchor leg (1100X, 1100X') being configured to secure the outer annular ring (1101, 1101') to an outer receiving area (731G1, 731G1') of a rotatable thrust plate of the thrust bearing assembly; (b) a flexible neck (1100N, 1100N') extending between the first outer end (1100A, 1100A') and the second outer end (1100B, 1100B'); and (c) a sealing leg (1100Y, 1100Y') extending radially inward proximate the second outer end (1100B, 1100B'); and (a) an anchor leg (1100X, 1100X') extending radially inward proximate the first outer end (1100A, 1100A'), the anchor leg (1100X, 1100X') being configured to secure the outer annular ring (1101, 1101') to an outer receiving area (731G1, 731G1') of a rotatable thrust plate of the thrust bearing assembly; (b) a flexible neck (1100N, 1100N') extending between the first outer end (1100A, 1100A') and the second outer end (1100B, 1100B'); and (c) a sealing leg (1100Y, 1100Y') extending radially inward proximate the second outer end (1100B, 1100B'); and a sliding ring (1100R, 1100R') having a pocket (1100P, 1100P') formed therein, the sealing leg (1100Y, 1100Y') being secured in the pocket (1100P, 1100P'), the sliding ring (1100R, 1100R') comprising a lubricious material and being configured to slide in a groove (1100G1, 1100G1') of a stationary thrust plate (732, 732') of the thrust bearing assembly and at least one of the sealing leg (1100Y, 1100Y') and the pocket (1100P, 1100P') tapers to improve retention of the sealing leg (1100Y, 1100Y') within the groove (1100G1, 1100G1') during rotation of the sliding ring (1100R, 1100R') within the stationary thrust plate (732, 732').