Alternator Pulley Question

[DXTAC]

I replaced the DS alternator about 3 months ago and recently Mongo developed a squeal of sorts. Well I learned that when I went to pick up the new alternator the guy at NAPA had installed my fan and pulley for me but neglected to add the lock washer. Over time the pulley began to spin free and started squealing and opening up. I took the nut off and the threads on the shaft and the nut were toast! The threads are cross threaded and the pulley now wobbles. I brought the alternator back to NAPA and he agreed to pay for a new pulley and replace the Wilson alternator without issue. The question I have is this, the pulley he ordered is 3.3 inches and the one that came on the truck is 2.8 inches. Will that difference in diameter matter? Won't the alternator spin at a slightly rate? Will it be okay???

Thanks in advance,

 

[yamabro]

At low RPM range you might not get the correct polarity and voltage signal

 

[TCUCV]

Always replace with the exact same part . . . there are reasons the pulleys are a certain size

 

[DXTAC]

I went to an alternator/starter rebuild place and they gave me the pulley, spacer, lock washer and nut for FREE!! All back together and purring like a kitten, well tiger maybe.

 

[Westech]

At low RPM range you might not get the correct polarity and voltage signal

What are you talking about? Changing polarity? huh?

 

[doghead]

At what rpm, does the polarity change?

Do you have a brother named Bret?

 

[Cucvnut]

is it a welder ?

 

[TCUCV]

I went to an alternator/starter rebuild place and they gave me the pulley, spacer, lock washer and nut for FREE!! All back together and purring like a kitten, well tiger maybe.

Glad to hear you got your truck back on the road...now its time to go have some fun!