Quote:
Originally Posted by Sugar Bear
... When installing the new belts line up the numbers and labels and it will be an indicator if one is slipping if the numbers no longer line-up. ...
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For how long have you seen the labels stay aligned? I would think after 100 miles of driving it would be very unlikely, but haven't tested it. There must be some differential inch-worm motion even in the most perfectly matched belts.
I am guessing the dual belts was so you wouldn't get stranded on the road. U.S. cars of the 70's w/ similar alternators usually had a single belt. I also carry nylon rope in my vehicles, so in an emergency I can tie it (barrel knot) to turn the just water pump to get home. It would be very hard to remove the AC and p.s. belts on the side of the road to get at the alt belt. If not driving at night, you don't need the alternator to get home w/ a diesel.