Motorcycle Repair: 96 Fatboy, air gun, compresser

Question
I have a 96 Fatboy and I am having trouble removing the mainshaft nut so I can replace the inner primary chaincase.  Any tips or ideas would be appreciated

Answer
USE A 1.1/2 INCH SOCKET WITH A BIG AIR GUN AND GOOD COMPRESSER HAVING AT LEAST 90 LBS OF AIR.  120 LBS OF AIR WOULD BE BETTER FOR YOUR AIR GUN. ALSO YOU CAN USE A LITTLE HEAT LIKE A PROPAIN TORCH TO HEAT THE NUT A LITTLE TO LOOSEN UP THE RED LOCTITE IT SHOULD HAVE ON THE THREADS.  SOUTHSIDE JOHNNY
www.southsidesdyno.com  Phoenix AZ. 602-340-1266