is there a special grease gun fitting I need to fit the grease hub on a 2002 ranger

 

nope, just a standard grease zirk fitting. why are you gonna grease it up with a gun though??? if you get it too full you could well pack it too much and overheat your bearings and ruin them. you really should just take your hub apart and hand pack. that way you'll also see how your bearings are wearing. they don't need a whole heaping glob of grease either. they don't dissipate heat very well when there's no air in there. you know what i mean???