[T3] whistling gen belt

Phil Hof phil.hof at ostronic.org
Sun Sep 28 10:30:29 PDT 2014


Actually, two of the local FLAPS claimed the original belt was 1005mm, the other 980.  These clowns have no clue.  I had to explain the numbering scheme to them.  I’ll try the NAPA store next… they seem to know more.

The 1000 belts were too large for both my original pulley and also the replacement.  I could rotate the belt by hand without moving the pulley.  Maybe my fan pulley has worn significantly?  Not out of the question, since the steel gen pulley did.  That could mean only a shorter belt would fit right.  At least the 11x990 is tight enough, though it does so without a single spacer washer between the pulley halves, so if it stretches as it wears, it may begin to slip.  So I’ll keep looking. Sounds like a 980 is about right.  Time will tell.

What belts are others running (12V)?

-Phil


> 
> On 27 Sep 2014 at 14:59, Phil Hof wrote:
> 
>> My whislting belt issue was resolved.  I did two things, not hacking
>> time to do the separately.  First was replacing the pulley halves with
>> another used pair that was not nearly as worn.  The second was to use
>> a different belt, one that had no cogs on the inner surface.  It?s
>> quiet now, though I have my cracked but functional original as a
>> backup with me.  Odd size? 11x990mm.  The 11 is a little wide, and the
>> 990 shorter than the spec of 1000, but the 10x1000 was WAY too loose. 
>> The 10x1000, by the way, was cogged and labelled for a 6V Type 3. 
>> Odd, since VW says 9.5x1000 is the correct 12V part. 
> 
> There may be something odd about the 10 x 1000 that you got, because 
> the 9.5 x 1000s that I've always used fit perfectly. 9.5 mm is almost 
> exactly 3/8", so my guess is that our belts are actually 3/8" x 1000 
> mm, with some makers marking these as 9.5 x 1000 and some rounding up 
> to 10 x 1000.
> 
> On this same note, 1000 mm is 1 m, which is 39.37", which explains 
> why 3/8 x 39.5" belts work pretty well.
> 
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
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