5/13 Direct or Alternative current?

My old friend who has been a professional mechanic engineer for servicing to automobile suggested that the problem this time is not so critical as to be resumed the original performance by just blowing away rain fall water inside of the dumb generator or by just pushing the blushes gently while motor were rotating if the reason was just a heavy rainfall.
So take it easy the problem on VW 1302 Super Beetle this time and how about replacing it into adequate AC alternator in near future? He is old enough to forget the VW old Beetle was air-cooled model?
That means the extension of generator drive shaft on the opposite side exists the big working cooling fan indeed?
I'm going to check the adaptation of blushes on commutator and to make recovering the original performance tomorrow.