From: gherold@teachspin.com   
      
   On Monday, May 6, 2019 at 11:24:16 PM UTC-4, et...@whidbey.com wrote:   
   > Mebbe I shud jest leave things be... But here goes my crazy idea. I   
   > have a Ford 9N tractor. The hydraulics that raise the arms of the 3   
   > point hitch system are powered by the same system that spins  the PTO.   
   > This means that when the post hole digger is kept raised it also must   
   > be spinning. This is dangerous but that's the way the 1939 tractor was   
   > made.   
   >    The tractor is a 6 volt system. I have a 12 volt clutch that I am   
   > thinking about interposing between the  PTO and the post hole digger.   
   > The clutch draws about 5 amps and the generator can put out 11 amps.   
   >     So what if I arrange, with some sort of switching, to have the   
   > generator connected in series with the 6 volt battery to power the   
   > clutch whenever I am using the post hole digger? Crazy idea? I could   
   > change the tractor to 12 volts but that would require a new   
   > alternator, battery, and coil. As well as the kit to make an   
   > alternator fit the tractor.   
   >    Since the battery and generator are new I can't justify to myself   
   > that replacing them needed to be done anyway so why not convert to 12   
   > volts.   
   >    Since I have a machine shop the mechanical part can be done   
   > properly. But just because I can engineer and build the mechanical   
   > part doesn't qualify me to judge the electrical part of my scheme.   
   > Thoughts?   
   > Thanks,   
   > Eric   
      
   Huh, I've got a TO-20 Ferguson.  (same arrangement)   
   How about just getting a marine 12 V battery and charge it   
   off the AC line before and after using the post hole digger?   
   You could try that first anyway.   
      
   Otherwise I think it could sorta work 6 V at 11 amp in and   
   12V 5 amp out... you  will have some losses so maybe less   
   than 5 amp out.   
      
   Hey here's another crazy idea.  Buy another six volt battery,   
   run in series to power 12V clutch, and then when done have some   
   transfer switch that lets you charge one, or the other 6V battery   
   (or both...) off the generator.   
      
   George H.   
      
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