How to remove Alternator fan ? - Team Camaro Tech
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post #1 of 11 (permalink) Old Apr 28th, 06, 03:52 AM Thread Starter
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How to remove Alternator fan ?

Hi everybody,

Can someone tell me the best way to remove an alternator fan ?
How do you hold the shaft still while backing off the 15/16" nut ?


My alternator is fine, but the previous owner put on a chrome fan and I'm taking back to stock.




I searched around but couldn't find a thread.
Thanks in advance.
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post #2 of 11 (permalink) Old Apr 28th, 06, 04:02 AM
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Re: How to remove Alternator fan ?

Quote:
Originally Posted by markr
Hi everybody,
How do you hold the shaft still while backing off the 15/16" nut ?
Should be a allen hex in the center of the shaft so you need a allen wrench. should be 5/16 if its a older alternator.

Greg U

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post #3 of 11 (permalink) Old Apr 28th, 06, 04:06 AM
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Jack
 
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Re: How to remove Alternator fan ?

If there is no place in the shaft to hold it with an allen wrench, use an impact wrench.

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post #4 of 11 (permalink) Old Apr 28th, 06, 05:50 AM
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Re: How to remove Alternator fan ?

What I've done very successfuly is clamp the allen wrench in a vise, put a box end wrench on the nut, then set the alternator upside down on the allen, holds it real good.





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post #5 of 11 (permalink) Old Apr 28th, 06, 09:51 AM
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Re: How to remove Alternator fan ?

The best way is to use an air powered impact gun zip-on/off quickly no need hold anything else. If you don't have one take it somewhere that does.
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post #6 of 11 (permalink) Old Apr 28th, 06, 09:57 AM Thread Starter
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Re: How to remove Alternator fan ?

Quote:
Originally Posted by HOGDADDY
The best way is to use an air powered impact gun zip-on/off quickly no need hold anything else. If you don't have one take it somewhere that does.
That's what I thought.
No Allen on my unit.
I'll take it somewhere.

Thanks Everyone
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post #7 of 11 (permalink) Old Apr 28th, 06, 11:15 AM
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Re: How to remove Alternator fan ?

The end of the shaft should have an allen socket in it, never seen one that didn't





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post #8 of 11 (permalink) Old Apr 28th, 06, 11:24 AM
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Cool Re: How to remove Alternator fan ?

Another 'Old'sKool' way of removing a pulley/fan from the shaft - is to clamp an old fan belt in a vise that's wrapped around the pulley so it's held tight and then loosen the nut ( on the impact if you have one...) - this works well on most of the older alt/gen/power steering units that don't have the socket (or allen) provision in the shaft end for holding it.

John

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post #9 of 11 (permalink) Old Apr 28th, 06, 12:47 PM Thread Starter
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Re: How to remove Alternator fan ?

Quote:
Originally Posted by JimM
The end of the shaft should have an allen socket in it, never seen one that didn't
Hmm....

Coulda swore the end of the shaft was smooth.
I'll take another look tonight.

Thanks
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post #10 of 11 (permalink) Old Apr 29th, 06, 03:13 AM Thread Starter
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Re: How to remove Alternator fan ?

Quote:
Originally Posted by JimM
The end of the shaft should have an allen socket in it, never seen one that didn't
You were right.
Odd..the allen socket was plugged with dirt.
I couldn't see it.
But the rest of the Alt looks great.
Odd.


Thanks Again

Markr
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post #11 of 11 (permalink) Old Apr 29th, 06, 03:31 PM
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Re: How to remove Alternator fan ?

Quote:
Originally Posted by JimM
What I've done very successfuly is clamp the allen wrench in a vise, put a box end wrench on the nut, then set the alternator upside down on the allen, holds it real good.
I too have done it this way and on the alternators with the dual groove and the nut not accesible using a box wrench I've set the amount of how far up the allen wrench sticks out of the vise to where a 1/2 drive socket can be place over the allen wrench sticking up from the jaws of the vise and then set the alternator down on it to engage both the allen wrench and the socket. Since the allen is through the center of the socket I use a pipe wrench to thentwist and grab the outside of the socket to loosen or tighten the nut.

If you are putting on an original alternator fan it should be all right however I had a customer last year with a chrome one that after the motor was revved to a high RPM the blades bent forward and started chewing up the backside of the belt. At first I thought there was a nick in one of the pulleys creating the damage to the belt. After looking for the problem you could visually see how much thinner the overseas fan was compared to a factory original one.

Jim

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