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Farmall & IHC Tractors Discussion Forum
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M Farmall Kills Battery

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Big un

09-10-2006 13:55:00




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I have a 1950 M Farmall and last week it started draining the battery.I have traced all the wires from the gen. to the switch to look for bare wires and I can't find anything wrong. I don't were to look next.As soon as you put a hot battery in it and hit the start switch it drains all the juice from the battery.Thanks for all the help ya'll.

Bigun




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onefarmer

09-11-2006 17:01:16




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 Re: M Farmall Kills Battery in reply to Big un, 09-10-2006 13:55:00  
Here is how I diagnose problems like that. Take one of the batt cables off, connect a volt meter in between and it should give you a reading, start disconnecting things one at a time ( regulator, lights, starter....). When the volt meter drops to zero you found the problem.



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Janicholson

09-11-2006 06:47:22




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 Re: M Farmall Kills Battery in reply to Big un, 09-10-2006 13:55:00  
There is a question of how fast it drains the battery. If it gets things hot, and the battery is pushing out 100 amps or so into a short, it needs to have every heavy (battery cable) checked for shorts to ground. If these are good (and "0" ga wire) then the starter switch could be grounding internally. If the switch and wires are good, then it probably is not shorting to ground, but may have the following wrong:
If the voltage regulator contacts are sticking (on the cutout relay in the regulator, the generator will continue to draw current when the tractor is shut ovv (as much as 15 amps) which will kill the battery in a few hours or so. If the amp meter is connected correctly and working, this will show as a discharge even when shut off.
I suspect this is ths case because the first problem (above is usually including smoke.
A new regulator will probably fix the problem. If not check the archives for John T trouble shooting guide, it is sxcellent. Good luck, JimN

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Marty Johns

09-10-2006 16:37:39




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 Re: M Farmall Kills Battery in reply to Big un, 09-10-2006 13:55:00  
Try cleaning ( ALL ) connections!!!!! ! I just recently rewire a mid 40"s A and everytime I used it, it seemed to have a weaker battery! finally would not start at all! took out battery, CHARGED and still nothing! cleaned all connections and guess what, IT STARTED!!! Prob. wasted my time charging it, just needed to clean things!!!!! !



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