Posted by Rich'sToys on April 09, 2021 at 09:30:40 from (50.33.17.35):
Is it possible for a battery to be so dead that a tractor won't run on it? My MM ZA had been parked all winter of course. Last week I put the charger on it overnight. The next morning the green light was on, indicating it was fully charged. A couple days later I tried starting it--nothing! Completely dead. We pulled it and got it running. Left it stand idling while I did some other things. Came back a little while later and it had stopped. Since my pulling helper was no longer available I jumped it with a 12 volt battery. It would run a few seconds and then stop. Did this several times.
Thinking I maybe had a fuel issue also, I pushed it into the shop to deal with it later.
Meanwhile I picked up a brand new 6 volt battery yesterday. Put that in this morning and it fired right up and sat there and idled perfectly!
Is it possible that the old battery was simply so far gone that there was not enough juice to make it run? I'm not 100% sure if the generator is working or not-the ammeter quivered a little but not much else. I've printed out John T.'s troubleshooting guide and plan to run through the steps, but in the meantime I thought I'd check with the brain trust here to see if anyone has any other thoughts.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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