An old customer of mine just had his Norge alternator rebuilt w/new bearings & rectifier. All CARCs have same alt, at least 3 manufacturers and most from China. You can get used ones reasonable. I would take it to an Alt rebuild shop, it's standard car stuff
Yes you have to remove tank to loosen a lock nut on pivot bolt on left side, loosen it on right side.
READ the Service book, it tells you how.