using a 24 volt alternator on a 4010 john deerer

kendell

New User
I am trying to replace the 24 volt alternator on my tractor. I need to know how to insulate to get it to work. the one that was on there worked fine for ten years. The tractor set for a few years. When I put new batteries on it there was a small short. Took it to the alt shop they said it only needed cleaning and it worked. But when I put it back on it really shorted and melted wires before I could disconnect it. I think he may have taken some wires or insulators out.

The tractor is 24 volt positive wire ground to frame.
Negative wire to the solenoid. The way the john deere book says. The alternator is 24 volt one wire neg ground. The wire from the back of the alt ran to the negative wire from the battery on the solenoid. Can someone tell me what to replace in the alternator
 
(quoted from post at 17:53:14 03/19/14) I am trying to replace the 24 volt alternator on my tractor. I need to know how to insulate to get it to work. the one that was on there worked fine for ten years. The tractor set for a few years. When I put new batteries on it there was a small short. Took it to the alt shop they said it only needed cleaning and it worked. But when I put it back on it really shorted and melted wires before I could disconnect it. I think he may have taken some wires or insulators out.

The tractor is 24 volt positive wire ground to frame.
Negative wire to the solenoid. The way the john deere book says. The alternator is 24 volt one wire neg ground. The wire from the back of the alt ran to the negative wire from the battery on the solenoid. Can someone tell me what to replace in the alternator
y schematics show an isolated generator, not an alternator.?? Do you have two 12v batteries with one + and one_ connected together with this connection being also connected to ground?
Like this?
 

kendell
If you think a 24 volt system on a JD tractor is positive ground because in REALITY it's not positive ground save yourself some AGONY and just change electrical system over to TWELVE VOLTS.:wink:

PS: 4010 didn't come from factory with a 24 V alternator so no factory wiring diagram is available.
 
(quoted from post at 17:53:14 03/19/14) I am trying to replace the 24 volt alternator on my tractor. I need to know how to insulate to get it to work. the one that was on there worked fine for ten years. The tractor set for a few years. When I put new batteries on it there was a small short. Took it to the alt shop they said it only needed cleaning and it worked. But when I put it back on it really shorted and melted wires before I could disconnect it. I think he may have taken some wires or insulators out.

The tractor is 24 volt positive wire ground to frame.
Negative wire to the solenoid. The way the john deere book says. The alternator is 24 volt one wire neg ground. The wire from the back of the alt ran to the negative wire from the battery on the solenoid. Can someone tell me what to replace in the alternator
ook at this:
http://www.steelsoldiers.com/showthread.php?56186-Isolated-Ground-Alternator
 
WOW!

The original system had it's shortcomings, but worked to a certain degree.

It sounds like the poor tractor has since suffered at the hands of a BLEM or two, and all bets are off as to how the electrical system may have been "re-engineered".
 

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