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Battery What whould Happen

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gjpgonzo
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Battery What whould Happen

Postby gjpgonzo » Mon Jan 16, 2017 2:24 pm

What would happen if I used a 12 Volt battery on a 6 volt tractor, and by accident reversed the polarity?

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les king
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Re: Battery What whould Happen

Postby les king » Mon Jan 16, 2017 2:34 pm

I don't think it would do damage, unless you keep it energized for a length of time. Then heat would be a problem.

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Re: Battery What whould Happen

Postby gjpgonzo » Mon Jan 16, 2017 2:39 pm

it obviously would not start correct?

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Re: Battery What whould Happen

Postby les king » Mon Jan 16, 2017 2:58 pm

I jump start them a lot using 12 volts, but I hook them positive to chassis. I don't run them unless I've don't the conversion. I do something on all my cubs that a lot of folks don't, is I put a 10 watt diode in line from ignition to distributer. Just because I have a bunch of them. No charging you condenser backwards

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Re: Battery What whould Happen

Postby Eugene » Mon Jan 16, 2017 3:31 pm

gjpgonzo wrote:What would happen if I used a 12 Volt battery on a 6 volt tractor, and by accident reversed the polarity?
Explain what you mean by used a 12 volt battery on a 6 volt tractor.

Do you mean using the 12 volt battery to jump start the tractor or to permanently install the 12 volt battery?

The starter is a universal motor, meaning it will only turn in the correct direction to start the tractor. Doesn't make any difference how the battery is grounded. The 6 volt starter will work on a 12 volt system.

The ignition system will work with either polarity. But prolonged 12 volt use without adding a ballast resister to the coil will burn up points.

The condenser is a storage device for electricity. Used to reduce arcing at the points when they open and to quickly discharge, helping to fire off the coil. Condensers work with electricity flowing in any direction, positive to negative, negative to positive.
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Re: Battery What whould Happen

Postby Bigdog » Mon Jan 16, 2017 4:00 pm

In addition to Eugene's last comments, with which I agree, the only other issue would be the light bulbs would burn out quickly with 12 volts applied.
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les king
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Re: Battery What whould Happen

Postby les king » Mon Jan 16, 2017 4:39 pm

Sorry if I gave you the wrong information. I like to see things work as they were engineered, a DC motor will run in either direction, the parts are labeled plus or minus for a reason. There is a reason for a six volt chassis positive, adding two more volts to a battery makes the efficiency more desirable with a chassis negative. Things will work either way . Nails and baling wire helps also. Good day to all.

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Re: Battery What whould Happen

Postby k hutchins » Mon Jan 16, 2017 4:43 pm

In my case, back in my young and ignorant stage, I connected my 6 volt with negative ground. The charging system wouldn't work. I couldn't figure out why the battery was always dead.
Why is there never enough time to do the job right, but always enough time to do it over. :?:

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Re: Battery What whould Happen

Postby indy61 » Mon Jan 16, 2017 4:54 pm

khutchins wrote:I connected my 6 volt with negative ground. The charging system wouldn't work. I couldn't figure out why the battery was always dead.


Should have still worked just fine.

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Re: Battery What whould Happen

Postby John *.?-!.* cub owner » Mon Jan 16, 2017 5:12 pm

les king wrote:...... a DC motor will run in either direction, .......
A DC motor that uses permanent magnets for the field, such as many of the later starters, blowers, fans, etc. will run in either direction depending on polarity. One that uses electricity from battery to power the field, such as the older starters, etc. will always turn the same way no matter the polarity.
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Re: Battery What whould Happen

Postby les king » Mon Jan 16, 2017 5:34 pm

You are correct, without rewiring the starter will rotate in the same direction. I am just stating that DC motions can be wired to rotate in both directions.


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