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Old 09-23-2016, 06:24 AM   #57
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1984 34.5' Airstream 345
Greenville , Ohio
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I have already committed to upgrading to 98 amps from my previous 78 amp alternator. It should be repaired and upgraded either today or latest Monday. I hope 98 amps will be sufficient and not get a voltage drop when turning on all of the exterior lights.
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Old 09-23-2016, 06:43 AM   #58
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Gunner, have you converted any of your exterior lights to LEDs? That will help some on the load side. Ive done all my running lights but nothing to my head lights or tail lights. Even when pulling the light switch out to the first position, without headlights, there is a good bit of amp draw on that circuit. One of these days Ill do my headlight conversion.
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Old 09-23-2016, 10:39 AM   #59
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I have changed to LED the top running lights and back up lights. I have not done the turn signal, tail lights or the head lights.
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Old 09-23-2016, 05:49 PM   #60
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I couldn't find the Lestek alternator in my shop. It could be in the barn and I'll try and look for it sometime this weekend. I may also have some pictures that I took of it and will search for those as well.
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Old 09-24-2016, 09:27 AM   #61
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Don't spend your time looking for it. I will live with the 98 amp alternator. It would have been interesting to know what amperage Airstream did install originally.
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Old 09-24-2016, 11:24 AM   #62
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The book on my 310 TD says it came with a 50amp alt. Though the numbers on the alt, which I think is oroginal, indicate an 80amp. Probably different than the gasser, or could be due to lack of demand on the alt.
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Old 09-24-2016, 11:55 AM   #63
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Quote:
Originally Posted by gunner View Post
Don't spend your time looking for it. I will live with the 98 amp alternator. It would have been interesting to know what amperage Airstream did install originally.
Well, my memory failed me on the amperage output for the Lestek. It 's 105 amps. I must have been thinking of the CS144 alternator I'm putting in my Argosy.
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The alternator I took out of Peanut was a 94 amp unit and I replaced it with the the same size. Apparently Airstream (or GM?) offered an upgrade from the the standard 63 amp to the 84 amp unit.
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Old 09-25-2016, 08:31 AM   #64
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That just confirms my repaired 98 amp unit will be fine, can't wait to get it back and test it with all my external lights on and hope it stays at 14 volts.
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Old 09-25-2016, 09:33 AM   #65
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Quote:
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That just confirms my repaired 98 amp unit will be fine, can't wait to get it back and test it with all my external lights on and hope it stays at 14 volts.
Doubt it will unless you replace all the wiring and contact points. Corrosion causes voltage drops too.
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Old 10-07-2016, 04:48 PM   #66
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Hey,
the "german guy" had also some "little issues" with the alternator last trip (see "the adventures of Bangles in Europe").
Our voltage was very weak, exspecially at night. 11.5 to 12.2 Volts max.! very bad at idle speed at daytime as well.
The lestek unit was unreplacable in Germany....!
I just cleaned the corroded contacts, sprayed with WD40 and replaced the corroded screw (just one was there!!!) and added one. The ground is only taken from the radiator housing, the regulator (LESTEK as well) is on top/passenger side. I added a heavy ground wire from this radiator frame to the chassis and the "issue" was solved.
13.7 Volts imediately, dirctly after idle speed. full throttle, same power.
A quick and "cheap" fix!Click image for larger version

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Old 10-13-2016, 10:19 PM   #67
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Am I seeing this right? It looks like the Lestek is a self-exciting, internal regulated alternator with a field and sense terminal. Identical to the GM version save the orientation of the blades for the pigtail. This means you could replace it with a GM AC Delco 10SI and splice in the GM Pigtail in place of the Lestek, or upgrade to a 15SI if you need more power.
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Old 10-14-2016, 05:17 PM   #68
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....oops! This is FAR too spezialized for me.
All i can say, LESTEK is out of business, you can browse Google, then you'll find quick some other solutions. I have -elsewhere- filed a wiring diagramm for a replacement regulator, allow me a few days to find it.
Before you spent time and money to replace the LESTEK regulator, try to clean the contacts and i proove the "ground" of it. I did so twice, it worked well!!
Hopefully you will "make it", good luck!


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Old 10-14-2016, 07:55 PM   #69
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I have had a Les-Tek alternator on my Snap-On truck since 1989....totally re-buildable and totally reliable. Regards, Bob
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