Seal assembly for track pin joint assembly

A track pin joint assembly comprising:

• a pin defining a longitudinal axis;
• a first member and a second member both coaxial with the pin about the longitudinal axis, the first member being pivotable about the longitudinal axis with respect to the second member, the first member including an end and a load ring engagement surface defining, at least in part, an axially-extending seal cavity disposed in proximal relationship to the second member;
• and
• a seal assembly, the seal assembly disposed in the seal cavity and sealingly engaging the first member and the second member, the seal assembly comprising:
• a seal ring, the seal ring having an axial flange extending along the longitudinal axis and a radial flange portion extending along a radial axis perpendicular to the longitudinal axis;
• and
• a load ring, the load ring including a seal ring engagement surface and a first member engagement surface, the seal ring engagement surface including a radial segment in proximate relationship with the radial flange of the seal ring and an axial segment in proximate relationship with the axial flange of the seal ring, and the first member engagement surface engaging the load ring engagement surface of the first member, the first member engagement surface including a radial segment and an axial segment, the radial segment of the first member engagement surface being in distal relationship with the radial segment of the seal ring engagement surface;
• and
• wherein at least one of the load ring engagement surface of the first member and the axial segment of the first member engagement surface of the load ring includes a convex rounded portion extending over at least half the axial length thereof.