TM 10-3930-669-20 c.  Installation. CAUTION · Apply  even  force  to  the  bearing  cup  to prevent cracking during installation. · Be   sure   that   the   bearing   cup   is   fully seated   against   shoulder   in   upper   axle bore. NOTE Left and right sides are installed the same way.  Left side shown. (1) Install upper bearing cup (16) in upper axle bore (11). (2) Pack upper bearing cone (15) with grease. (3) Install upper bearing cone (15) in upper bearing cup (16). NOTE Upper seal lip should be facing toward knuckle when installed. (4) Coat upper seal (14) with grease. (5) Using a soft-face mallet, install upper seal (14) in upper axle bore (11). (6) Install  two  screw  plugs  (12)  and  upper  grease fitting (13) in upper axle bore (11). 13-21