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 Post subject: Fan belt fraying
PostPosted: Thu Jun 09, 2011 2:05 pm 
356 Fan

Joined: Sun Nov 09, 2008 11:33 am
Posts: 33
Location: peckville Pa
The current belt from a 356 sponsor, began fraying and I removed it before it broke. at about 200miles.Tension is 1/2 to 3/4 inch, correct # of spacers. I installed fan belts on my SCCA Conv D for over 22 years and never had a problem On Cinv D race car, using a gutted 6 volt gen and small aluminum pulley. On Speedster with the current problem 912 case, am using a 912 Generator and stock pulley . The alignment of pulleys seems to be ok and their are no discernable marks, tears on either pulley. Anyone have any ideas.?

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 Post subject: Re: Fan belt fraying
PostPosted: Thu Jun 09, 2011 2:45 pm 
356 Fan
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Joined: Tue Apr 29, 2008 9:54 pm
Posts: 990
Location: Long Island, New York
Tag: On theSamba.com
I only use Gates belts. Double and triple check the pulley alignment.

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 Post subject: Re: Fan belt fraying
PostPosted: Thu Jun 09, 2011 3:47 pm 
356 Fan
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Joined: Wed Aug 27, 2008 10:54 am
Posts: 2143
Location: Alpine AZ, Green Valley AZ
Also check the generator pulley halves for cracks. If the alignment is OK (check with a straight-edge), check the crankshaft pulley for any damage in the belt area. SOMETHING is eating on your belt.

Cheers,
Wes

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 Post subject: Re: Fan belt fraying
PostPosted: Thu Jun 09, 2011 4:06 pm 
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Joined: Sun Mar 16, 2008 6:25 pm
Posts: 303
Location: Santa Clarita, CA
Ray,

My first idea is that you got a bad fan belt.

You know what you are doing, so don't start doubting yourself and presume a problem.

If a second, fresh belt gets chewed up, then start looking.

You asked,

Bob

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 Post subject: Re: Fan belt fraying
PostPosted: Fri Jun 10, 2011 3:36 pm 
356 Fan

Joined: Thu Apr 03, 2008 10:30 pm
Posts: 3
I had similar problem. Found out pulley halves were bent/warped. New pulleys-end of problem.
Jan Ramaker


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 Post subject: Re: Fan belt fraying
PostPosted: Sat Jun 11, 2011 10:08 am 
356 Fan

Joined: Sun Nov 09, 2008 11:33 am
Posts: 33
Location: peckville Pa
Thanks everyone for responding Cleaned everything put a Gates belt on, replaced 1/2 of pulley outside AS that was all I had in my parts bin. If the problem occurs again I will replace bottom pulley and both haves of gen pulley

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 Post subject: Re: Fan belt fraying
PostPosted: Sun Jun 12, 2011 10:39 pm 
356 Fan

Joined: Sun Apr 20, 2008 12:54 am
Posts: 2919
Ray,

If your crank pulley doesn't have any "chip-outs or burrs" in the Vee, you needn't remove the pulley (your words=bottom pulley).
Usually, the generator pulley 1/2s are the problem over the years if the wrong screwdriver is used in the slot(s) and get distorted and the 1/2s get warped!

Dick


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