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Old 08-18-2005, 07:34 AM
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Alternator - small bind when turned

I got a new 140A Powermaster alternator from Summit yesterday and when I spin it, it kind of lightly binds at one point during the rotation. It is not hitting against anything and feels like a magnetic pull. This happens spinning it slow or as fast as I can spin it by hand.

Is this normal? I don't think it is and would appreciate some opinions before I call Summit for another one.

Thanks,

Dan

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Old 08-18-2005, 10:46 AM
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You may have a bent armature shaft. Check the runout at the pulley. The armature runs inside magnets so the pull is a good thing and a bent shaft would reduce the air gap to the magnets creating your "bind"...
Mark
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Old 08-18-2005, 11:21 AM
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I talked with Powermaster's tech support and the guy said that it may be caused by the thing sitting on the shelf for a while and the weight being on one part of the bearings. The inspection tag says 6/1/05, which isn't *that* long. He said that it will probably go away after installing and running it for a little while. If not, its got a 1 year warranty.
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Old 08-18-2005, 03:53 PM
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Drag

Doc here,

Yeah, and cancer gets better all by itself...

What's probably happening is the Bearing probably has a flat ball in it, OR the Brushes are misaligned...

I would Take it back! Rod knocks don't get better "just running it" Why should a bad shaft bearing or a set of bad brushes??

Tell "em you didn't pay for the audio option...

Doc
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Old 08-18-2005, 08:55 PM
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I've dealt with Summit many times through the years and have had no problems returning items. If your not satisfied witht he product, say so on the order form and return it. If you have them send another one you may run into the same problem, so I would request a refund and then go somewhere else for a replacement. You may be out the cost of shipping. Next, go somewhere you can feel the rotation before you buy it. Also, I don't go to Autostoned or Desperate Auto Parts (DAP) for alternators. I go to a shop in town here that works on them in house. I've only bought one from them years ago and have had them rebuild it once since then. Works for me!
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Old 08-19-2005, 09:01 AM
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I'm sending it back. I think it was dropped or something. The factory box was a little beat up and it was the last one on the shelf - Summit is out of them until next month.
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Old 08-19-2005, 09:44 AM
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Alternator

Sometime the case just gets miss-aligned due to poor handling by UPS or who ever. This can usually be cured by loosening the 3 or 4 screws that hold the case together, moving it a bit to see if the bind goes away and then re-tightening the screws evenly !!

Hope this helps
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Old 08-19-2005, 03:05 PM
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Quote:
Originally Posted by T-bucket23
Sometime the case just gets miss-aligned due to poor handling by UPS or who ever. This can usually be cured by loosening the 3 or 4 screws that hold the case together, moving it a bit to see if the bind goes away and then re-tightening the screws evenly !!

Hope this helps
I'll give that a try. The reason I got this item in the first place was the Jegs chrome case kit I put on my stock alternator is cheap and the bearings make a bunch of noise after running for a few minutes. And, I broke the ceramic housing inside swaping the case, and well, I'm just tired of dealing with alternators! The Powermaster is a nice polished chrome 12si 3-wire alternator - just what I wanted.

Anyway, I ordered another one from Pace Performance - they have it in stock and it'll be here next week.
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Old 08-23-2005, 07:57 PM
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T-bucket23 - loosening the bolts and jiggling it a bit didn't help.

I got the new one from Pace today and noticed a few differences - First, it didn't bind when I spun it, the Box wasn't beat up, there were instructions and the shaft on the allen head socket end wasn't drilled/rounded out I didn't try, but I bet it would have been a pain in the to remove the pulley and put my serpentine pulley on.

I'm going to send the old one back to Summit and get a refund and let them have a word or two about quality control - this alternator was obviously a returned item. Might even send a photo of the drilled/rounded out shaft!
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Old 08-23-2005, 08:08 PM
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Old 08-23-2005, 08:16 PM
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I quit buying from Summit a long time ago.
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Old 08-23-2005, 08:18 PM
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Summit did send me a nice hat with my first order - but my wife claimed it.

I do like Summit because you can find out if what you want is in stock before you order it online.

Here's the photo - you can see that the end of the shaft has no hex-head at all. It's about 3/4's the way down before you can see the six sides.
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Old 08-24-2005, 07:40 AM
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Rebuilt Alternators

The problem with all those rebuilts is they are rebuilt in a factory somewhere buy some person who doesnt even know what an alternator is. they just put it together and test it to see if it puts out the proper voltage and amps. If it does it goes in the box. It is a cut throat business and there are a lot of people doing it. I had a friend who had his own starter/alternator rebuilding business. He gave up rebuilding and was just purchasing and re-sell one of the big name rebuilders products. It was cheaper for him to buy than to do the rebuiling himself. He tested every one that came in before selling them. He had a 20-30 percent failure rate, most due to improper assembly or crappy soldering.
Dont get on Summit, they dont open the boxes to test anything. As long as they take care of it when you have a problem thats all you can ask. I have had real good luck with them and their prices can be beat for the most part.

I have had real good luck with Tuff Stuff alternators. fairly decent chrome and I have never had one fail out of the box. They are a little more expensive but they work. I beleive they are all new parts as well.
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