Farm Equipment - ? 12 volt alt

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? 12 volt alt

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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=17552
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Topic: ? 12 volt alt

Posted By: landpainter
Subject: ? 12 volt alt
Date Posted: 01 Sep 2010 at 9:29am

HI,I wired my wd45 to 12 volt alt from a diagram I found online. I can start and turn off ok but drains battery-what am I missing? thanks

Replies:

Posted By: CTuckerNWIL
Date Posted: 01 Sep 2010 at 10:28am

I have never had a problem with mine except I had to put a diode in to get it to shut off when I turn the key off. I guess others have had this problem and I think the answer was to run the excit power through an ignition switch. Better wait for the experts I guess. Maybe Steve B will jump in here. Charlie

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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF

Posted By: Steve in NJ
Date Posted: 02 Sep 2010 at 8:58am

If you have your Alternator wiring direct to the Battery, you will have a drain problem. An Alternator & Generator work as a Dynamo to draw mili-volts from a Battery if there isn't anything to interupt or "sever" the Battery from the Charging source. Best way to do this is wire your Alternator through an Ignition switch as I do in my 12V conversions. This will sever the Battery and remove the Battery out of the loop when the key is in the OFF position. You'll need to install a 1 amp/50V diode down stream of the Alternators VR circuit (#1) so you don't have any backfeed to the Ignition switch when the key is turned OFF. Any other questions, just e-mail me or give a call. Be glad to help ya out...

mailto:Steve@B&B - Steve@B&B (973)-632-5596