Posted by JD Seller on July 17, 2013 at 20:40:38 from (208.126.196.144):
In Reply to: John Deere 4010 posted by rustred on July 17, 2013 at 19:59:02:
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If it is 24 volt the starter will have two battery cables running to it. One hooks to the solenoid just like normal and the other goes on a separate terminal on the side of the starter. There also will be a small 10-12 gauge wire on the negative terminal on the left battery. MAKE sure this wire does not get broken if you leave it 24 volt. If it breaks you will send 24 volts through the lights and anything else you have hooked to the tractor electrics.
The starter is usually the only thing that sees 24 volts. You have one battery 12 volt negative grounded and one battery 12 volt positive grounded. The lights are split in half so they draw current from both batteries at about the same rate. The voltage regulator brings the batteries up to full charge. If you hook something to the one battery and draw more AMPs off it your one battery may go dead while the other one is full charged. The regulator quits charging when ever one battery gets up to full charge.
The 24 volt system takes some one that is familiar with them to keep them working. I have a JD 4101 and it is still 24 volt. It works fine but I had to go through the harness and repair some bad spots and clean up a bunch of connections to get it to work right.
As far as switching it to an alternator. Why??? If it is 24 volt you need to be switching it to 12 volt. The cost of switching one to 12 volt is around $1000. There are some after market kits that used a gear reduction starter and they are cheaper. I do not like them as the starter will not crank them fast enough in cold weather. You need to change the starter, battery cables, switch some wiring around, and install a alternator.
The generator is not the main issue/problem you have. The batteries draining are being caused by something else. More than likely the voltage regulator.
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