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Alternator

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Meathead

06-12-2002 12:42:05




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I removed the generator from my Detroit 3-53 diesel engine. My local shop says I can run one wire to the only terminal on the alternator he sold me, it has an internal regulator. The 12v wire will go from the one terminal on the alternator then to the ammeter, through the key switch and back to the battery. Is there anything wrong with that method? Or should it be just fine? Thank you




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Clooney

06-13-2002 09:21:55




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 Re: Alternator in reply to Meathead, 06-12-2002 12:42:05  
Meathead, all sounds good until the part about running it THROUGH the "key switch".
~Just run from the ammeter to the battery & not through the key switch, that switch won't take the high current of a charging alternator.
~If the alternator is a higher amp output [most single wire alternators are]> 55 amp or higher you will probably need to use a larger capacity wire from the alternator to the ammeter & ammeter to battery. [at least 12 gage, & 10 gage would be better yet.

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Dynaman

06-14-2002 13:00:12




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 Re: Re: Alternator in reply to Clooney, 06-13-2002 09:21:55  
Why don't all simple tractor/backhoe loaders use the simple one wire alternator??



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Clooney

06-15-2002 10:16:39




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 Re: Re: Re: Alternator in reply to Dynaman, 06-14-2002 13:00:12  
Dynaman, for the same reason the auto companies don't. Single wire alternators have some drawbacks. The biggest being they loose their ability to self start if left sitting without use for too long, then they must have power run to the regulator to get them to start charging again.
~The other drawback is most, [not all] single wire alternators need a fairly high RPM to start the charging cycle & if the tractor is started & run at low RPM's [a characteristic of tractors] it might not charge at all.
~If the energizing circuit is built into the electrical system to begin with it is cheap, & allows better alternator control with better current control..

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