The Ford Barn

mfarley · 07-02-2018, 03:09 PM

I have a 6V alternator on my 29 Tudor Sedan, and I noticed that the alternator pulley is significantly smaller in diameter than a standard Model A generator. The alternator pulley measured 1-1/2" or 1-3/4" diameter and I believe the Model A generator pulley is something like 3 or 3-1/2".

Seems there is always a little more play in the fan belt than should be, and I'm wondering if this is why. Should I account for this diameter difference in belt length, try to put the larger pulley on the alternator, or run it as-is?

07-02-2018, 03:09 PM	#1
mfarley Member Join Date: Jun 2017 Location: Bismarck, ND Posts: 84	Alternator vs. Generator Pulley I have a 6V alternator on my 29 Tudor Sedan, and I noticed that the alternator pulley is significantly smaller in diameter than a standard Model A generator. The alternator pulley measured 1-1/2" or 1-3/4" diameter and I believe the Model A generator pulley is something like 3 or 3-1/2". Seems there is always a little more play in the fan belt than should be, and I'm wondering if this is why. Should I account for this diameter difference in belt length, try to put the larger pulley on the alternator, or run it as-is?

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