invention has application wherever it is desirable to provide a seal between two members having relative rotational and limited axial movement therebetween one such application is in a track pin joint 12 in an endless track chain on track type earthmoving vehicles in operation the end face seal assembly 10 provides a gradually increasing axial face load on the sealing lip 38 as the load ring 44 is loaded in shear between the seats 26 and 64 and compressed between the free state illustrated in fig3 and the fully loaded state illustrated in fig2 in response to relative axial movement between the first and second links 14 16 the axiall face load is maintained at a preselected minimum value upon the initial installation of the seal assembly in the track joint in order to assure positive retention of lubricant and to exclude the entry of foreign contaminants therein importantly the decreased interference or pressed fit relationship of the load ring and the cylindrical surface 30 of the counterbore 26 results in increased ease of installation of the seal and better consistency in assembly thereof as the seal assembly 10 is compressed the exterior surface 80 of the load ring 44 is deformed in such a way that its concave shape becomes generally curvilinear as is best illustrated in fig2 it is of significance to note that in the compressed state the improved load ring is free from the undesirable axially outwardly bulging of the exterior.