A seal assembly includes first and second generally annular seals disposable about the shaft so as to be spaced apart axially along the shaft central axis. Each seal has an inner circumferential sealing surface and inner and outer axial sides, each inner axial side facing the other seal inner axial side. The first seal has at one or more coupling pockets extending inwardly from the first seal inner axial side and the second seal has one or more retaining pockets extending inwardly from the second seal inner axial side, each retaining pocket being aligned with one coupling pocket. One or more biasing members each have a first end disposed within one coupling pocket and an opposing, second end disposed within one retaining pocket, the biasing member being configured to exert an axial biasing force on each one of the first and second seals.