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Re: Converting my Farmall 300 from 6 volt to 12 volt how do I do this?
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Posted by Rick K on February 08, 1999 at 17:52:14:
In Reply to: Converting my Farmall 300 from 6 volt to 12 volt how do I do this? posted by Scott Bleck on February 08, 1999 at 14:06:00:
replace generator with 1 wire GM/Delco alternator. replace battery with 12 volt battery. replace lights with 12 volt lights. add ballast resistor in series with ignition coil. I think Central tractor sells a universal ballast resistor, but just about any ballast resistor made for any points and condensor type automobile will probably be close enough. ammeter gauge needs no changes. other gauges will have to be replaced with 12 volt versions, or you will have to improvise with a 12 to 6 volt regulator - an Integrated Circuit p/n 7806 will drop 12 volts to 6 volts to run gauges. It has limited current capability, so don't try to run the 6 volt lights with it. Original starter will probably work, just don't lay on it for a long time. If you look thru past pages, I'm sure you will find people with pro and con opinions about running a 6 volt starter on 12 volts. My only opinion is that motors will burn up if they get too hot, as things inside melt - don't crank it so long that it gets hot. I take care of a Case that a local Horse Club owns that has been converted. No problems yet, although it is only one year since the conversion. My Farmall 100 still has 6 volts, and I will probably leave it that way untill I have a real good reason to change it. It started up a couple weeks ago after sitting for 3 weeks. The temperature was about Zero F, and it has 30 weight oil in it. It cranked fine, although it took a few attempts to get it to fully catch. My only regret is that it is hard to get 6 volt lights (not impossible, just usually special order). Does any one have an original Farmall A/100 headlight for sale? One of mine is smashed, housing and all. I think that should cover the 6-12 conversion. there are probably a dozen similar stories if you look back thru the pages on this Board. And again, since this seems to be such a tender topic on this Board, I have no opnion one way or the other on 6-12 volt conversions, other than don't overheat the starter, and do what you want to do, it's your machine.
Rick
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