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Tractor Talk Discussion Forum

farmall h

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Author  [Modern View]

10-09-2012 14:04:09

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sons h will not charge his 2 month old battery but tractor stays running with battery disconnected,it is a 12 volt system,any thoughts ?

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Ric. Ks.

10-09-2012 19:45:18

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 Re: farmall h in reply to ohiojeff, 10-09-2012 14:04:09  
quickest way to ruin an alternater is to disconnect the battery while the vehicle (tractor) is running. BTDT :(

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10-09-2012 17:28:05

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 Re: farmall h in reply to ohiojeff, 10-09-2012 14:04:09  
genny or changes to an alternator?

if alt. what type?

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10-09-2012 17:19:13

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 Re: farmall h in reply to Leroy, 10-09-2012 14:04:09  
Quoting Removed, click Modern View to see

It could be either the alternator or wiring.
You can measure the output from the alternator, or take it off and down to your local parts store to have it tested. They normally do that for free.

If it tests good, likely wired wrong or has a bad connection.

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David G

10-09-2012 17:14:38

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 Re: farmall h in reply to ohiojeff, 10-09-2012 14:04:09  
If it has a magneto, it does not need power.

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10-09-2012 16:02:10

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 Re: farmall h in reply to ohiojeff, 10-09-2012 14:04:09  
does this mean alternator is bad or could wiring be an issue,such as corrosion or a short?

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Zachary Hoyt

10-09-2012 16:31:09

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 Re: farmall h in reply to ohiojeff, 10-09-2012 16:02:10  
If the tractor has a battery ignition distributor then the alt must be putting out something or the tractor would stop running when the battery was disconnected. If the tractor has a magneto ignition system then the alt would be irrelevant to the running of the tractor since the magneto makes its own spark without the battery.

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10-09-2012 14:39:26

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 Re: farmall h in reply to ohiojeff, 10-09-2012 14:04:09  
The h was a 6 volt, generator system originally. If it has a mag, it will not need a battery to run. I would say you have a wiring issue if the alternator has output.

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10-09-2012 15:35:23

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 Re: farmall h in reply to, 10-09-2012 14:39:26  
voltmeter shows 11.58v

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Michael Soldan

10-09-2012 15:46:55

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 Re: farmall h in reply to ohiojeff, 10-09-2012 15:35:23  
Jeff,I think its the charging system..11.8 volts isn't enough to charge a 12 volt need an output of 13.8 to 14.3 to charge a 12v

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