Thislubricant serves to lubricate the primary dirt lip 70.The primary dirt lip 70 bears against the inner axial wall 42 of the rotating shield 40 to establish a live barrier which excludes contaminants, such as water and dirt, from the interior of the bearing A. The oblique secondary lip 56 revolveswith the rotating shield 40 and bears against the axial wall 62 of the fixed seal case 60, thus esta