[bobH]

For whatever it's worth.... I put a 6-blade fan on my 34 (original 21 stud). I'm assuming it must be very similar to your 32. I never had any problems with generator bearings (original 3-brush generator). I got the fan from a junk yard friend, and he said it was from a 34 'orchard truck'.
I feel that it helped cooling at low speeds.