2011 Arctic Cat 450XC Service Manual, Page 102Get this manual
NOTE: Prior to installing the seal, apply High Performance #2 Molybdenum Disulfide Grease to the seal outside diameter
3Install the front axles (see Drive Axles in this section)
4Using an appropriate seal installation tool, evenly press the seal into the cover bore until seated
CAUTION
Make sure the tool is free of nicks or sharp edges or the seal will be damaged