if you took the 3 M8 bolts out, it should come off....
try using a tire lever (but no brute force!) between the alternator body and the bottom bracket (see bottom picture) to leverage it out. some WD40 could help too.
try using a tire lever (but no brute force!) between the alternator body and the bottom bracket (see bottom picture) to leverage it out. some WD40 could help too.