Desert Steven,
Well Sir, you're in for some work. The fan is held onto the rotor with I think, 4 long bolts. It's been a while. Take a look at the picture below.
You'll see the fan is between the rotor/stator and, the front cowling. The front cowling and all related hardware/equipment has to be loosened enough to tilt somewhat forward (away from the fan, in order for the fan to "slip" out between the stator and the cowling. I had to do some serious work on my gen as you can see by the fact that it was that far torn down at the time this picture was taken. But, at the minute, I can't remember just what size the bolt heads are that hold that fan to the rotor are. The fan has a seal it rides against that's on the cowling.
Sorry I can't be of more help. I just loosened things up as much as I dared and tweaked that entire front cowling enough to not only remove the fan but also the damaged rotor I had and some other equipment. Hope this helps some.
Scott
