Onan 7500 Diesel Generator

Has anyone ever change out the cooling fan on this generator ? I have the part but trying to find the best way to access the fan. Since the blades was torn off of the old one it would come straight out the top after removing the top panel. Since this one is a new one it is too large to fit down from the top. I tried removing the wire protection on the bottom and slip it up through there but the shroud separating the radiator and other engine components just sticks up enough you can't get it by. If there is a way to just undo that shroud and move it up just an inch or two then may have enough room to get it by. Has anyone else had this issue and can tell me an easier way to do it ? I started taking this thing apart and should have been videoing it so someone else may not have to go through what I am but now I've gone beyond that. Any help will be appreciated.