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Allis Chalmers Discussion Forum
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battery charging

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van

11-02-2003 14:07:23




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I have a series D10. It was hooked up with a positive ground. Dumb me, I thought that was wrong and switched it to negative ground. Then to charge the battery I hooked up a standard 6/12 charger. after 15 minutes the generator was hot and it would not start-not even a click. Did I burn out the alternator. The voltage regulator looked unharmed. Would a burned out alternator cause it not to even click when keyed on?

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van

11-03-2003 17:43:31




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 Re: battery charging in reply to van, 11-02-2003 14:07:23  
Thanks to Dave and Steve. The battery was dead ( now charged ). I changed the polarity back to pos. ground and everything is working well. This is what happens when a car mechanic fools with a positive ground machine.A real learning experience.
Thanks.



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Dave K

11-03-2003 07:55:29




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 Re: battery charging in reply to van, 11-02-2003 14:07:23  
If the generator got hot you probably have a stuck cut-out switch which allows battery current to flow through the generator to ground when engine is off. As long as you had the battery charger terminals hooked up correctly to the battery it should charge. If, however the generator is getting hot, you definatly have a path to ground through it. This will discharge the battery and also not permit it to become charged. You can remove battery cables and charge the battery, then connect cables and if you get a spark when you connect the last cable you have a path to ground somewhere. I would clean the points in the cut out abd be sure they have not welded themselves together. You may now also have a bad battery from being dead too long. They will sulphate and not hold a charge.

Dave

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steve

11-02-2003 17:42:24




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 Re: battery charging in reply to van, 11-02-2003 14:07:23  
the origiinal D series was positive ground. you can connect the terminals up so you have negative ground like a new vehicle if you wish. the voltage regulator needs to be polarized for that system. the charging unit on your tractor is called a generator. an alternator is an aluminum housed unit found on a car or truck built after 1965.
--first of all, the generator has nothing to do with the starter cranking. charge up the battery real good. clean the terminals on the battery and the ground wire to the frame, and the starter terminal. now try, the starter should crank and motor start. --depending on how you connect the battery, you need to repolarize the voltage regulator (small black box) with key on, touch the B and G terminals together for 1 second. get a shall spark. now start the tractor and it should charge o.k. dont matter if it was + or - ground since you set the regulator to match.

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