Ferguson to20 6 volt

Hi my 49 Ferguson to20 6 volt tractor has been acting up lately. I just finished rewiring the 6 volt system also had the generator rebuild and a USA new voltage regulator installed too. When I start is it charges now to about 7.6 to about 7.8 volts but everyone tells me it should be around 7.2 if you keep it that way they say you can ruin your battery over time. But my problem is once I get it started and using it I will shut it off to do something and when I come back to start it again it won't start it's like the battery went bad then I have to put it on the battery charger. I was maybe thinking that I can adjust the voltage down to 7.2 lower and see if it still does it. Any help is appreciated Thanks
 
That voltage won't hurt anything.
Chances are you have a drain or a bad battery.
Disconnect a batt cable, place a test light between the cable and batt post. The light should not be on.
if the light is on, you have a short. Make sure everything is off. Light still on? Start disconnecting things. Pull the wires off the alt.
Light on? Pull the wires off the reg. Light still on? Keep going.
Once that light is off, you fund your problem.
If the light does not come on to begin with, chances are the battery is not holding a charge. It' show old?
 
Okay thanks I bought the tractor last August and he just bought the new battery then so 2019 it was a 700 cold cranking amps and it was a tractor supply brand Traveller?
 
Did you polish the cables and terminals before installing, or just say "Yeah, it's new so it's gotta be good" ??
You and a few other people have done the same thing. I even tried it once. I had to go back in a and clean it all up.
Your turn.
Where does the machine ground at? Behind the dash or down at the starter?
Guess which one is notably a weak grounding point.
It ain't the starter location.
 
Mine ground or positive ground goes down to one of the bell housing bolts. I was thinking possibly converting to 12 volts because I already have a new alternator already. But if it's a small fix I would do that instead. I had to move some snow today started fine after about 3 weeks of sitting ran it for about 10-15 minutes then shut it of didn't start again
 
I converted one and then wished I would have left it 6V.
Your mileage may vary.
Doesn't start?
Doesn't crank or cranks and does not start?
 
Ok here's what happens. Its been sitting for about 3 weeks. I started it yesterday with the clutch down started great used it for about 10 minutes shut it off for another 10-15 minutes go to start it with the clutch down again slow crank crank. Barely rolls over and basically dead then I have to put it on a battery charger for about 30 minutes then it will start again.
 
Simple enough quite possibly.
I would start with cleaning the cables and batt post's.
Clean and lightly lube the battery ground.
Your either fighting a weak charging system or a bad starter.
Next time it cranks slow, put your hand on the side of the starter.
Warm or burning hot?
Your starter might be getting too warm to crank over without drawing down the battery.
Clean up the charging system connections first.
You can hang a new starter on it and after spending too much find out your problem still exists because you didn't start with the basics.
 
So, I converted my dad?s TO-20 and mine to 12v by having the generator rebuilt (both needed it anyway) to12v. New 12v coil, battery and voltage regulator. Why did you decide to go back to 12v ? 6v is a nightmare.
 
The 12V conversion is good if you have multiple components needing replacement or deep enough pockets.
The 6V is also desired by some purists.
 

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