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John Deere Tractors Discussion Forum
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Alternator conversion for 2010 gas

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Believer45

11-04-2003 20:09:05




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The generator pulley for my 1961 2010 disintegrated this afternoon, I believe taking my radiator with it. Can anyone tell me what would be involved in putting an automotive alternator on it rather than the factory generator?

Dave / Believer45




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DeslDan

11-05-2003 14:28:30




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 Re: Alternator conversion for 2010 gas in reply to Believer45, 11-04-2003 20:09:05  
Your 2010 gas was indeed a 12 volt system. However it was a 12 volt positive ground system. Is the alternator you purchased a positive ground or negative ground? You can change your 2010 over to negative ground quite easily. Remember to change the polarity at the ignition coil. Your fuel gauge may work by reversing the wires at the gauge. Getting the fuel gauge to work can be a hit and miss deal because Deere used several combinations of gauges and senders. I wrote an article for Green Magazine a year or two ago if you can get a copy. Connect the Field wire of the alternator to your "idiot light" or "gen light".

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tommy3020

11-06-2003 17:51:44




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 Re: Re: Alternator conversion for 2010 gas in reply to DeslDan, 11-05-2003 14:28:30  
Hey dan ,I enjoy reading your helpful hints in GM.You keeping at 140,3010,and4020 in top shape?Take care .Tom in Tigerton



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Believer45

11-05-2003 15:07:53




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 Re: Re: Alternator conversion for 2010 gas in reply to DeslDan, 11-05-2003 14:28:30  
The positive battery cable goes to the starter solenoid post, the negative is grounded to the frame. I have not done anything to that part of it, original looking generator came off this afternoon. I got a 1970's GM alternator with an internal regulator, it appears all I have to do is get a curved adjusting bracket, grind 1/2" or so off the thick mounting ear and bolt it in place with a slightly shorter belt. Wiring - ground strap from ground stud, wire from charging stud to starter solenoid main power stud, terminal 1 to constant hot, terminal 2 to switched hot with an idiot light in the circuit. Please let me know if this does not sound right. Maybe someone converted to negative ground some time in the past?

Dave / Believer45

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Dan

11-05-2003 07:21:18




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 Re: Alternator conversion for 2010 gas in reply to Believer45, 11-04-2003 20:09:05  
Should be an easy task to convert to alternator as it is already 12 volt system. Check archives for a wiring diagram, id you can't find one here check on IH site. As mentioned the delco with internal regulator works well. Parts are easy to find and you can find the alternator at wrecking yards for a low price. Get one with a lower output as you don't need 65 or 100 amps. You need a resister or indicator lamp in the field wire to keep from back feeding(or you can't shut t off). JD had a resister setup that pluged in at alternator to handle this. If you e mail me I can give ya more details, willhave to look at wiring diagram again. Have changed over 2 tractors to 12 volt alternator from 6 volt generator.

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Believer45

11-05-2003 10:01:38




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 Re: Re: Alternator conversion for 2010 gas in reply to Dan, 11-05-2003 07:21:18  
I got the alternator today, lifetime warranty from AutoZone. It looks like I will have to grind a bit off one of the mounting ears and get a curved adjuster bracket so the belt will line up but it will be an easy fit. Came with wiring instructions, it should be a snap.

I think I am going to put an indicator light in the dash, does it need a specific wattage bulb or will any weatherproof indicator light work?

Thanks for your reply and encouragement. I did find a used pulley for $80 (no longer available and a reman generator comes without a pulley).

Dave / Believer45

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old

11-04-2003 20:17:27




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 Re: Alternator conversion for 2010 gas in reply to Believer45, 11-04-2003 20:09:05  
A GM alternator with internal regulator is pretty easy to put on. Make a bracket /use the one for the genarator run a wire from the battery terminal of the alternator to your battery and another wire from the field to a hot when the key is on place in the system. also if you want to know if its chargeing you put an amp gauge in the wire from the battery post of the alternator to the battery> sorry about some of the spelling and hope this helps you

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Believer45

11-05-2003 10:09:19




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 Re: Re: Alternator conversion for 2010 gas in reply to old, 11-04-2003 20:17:27  
Thanks for the tip - it looks like this will be my best option. 65 amp lifetime warranty alternator without core is $52.00 or so, a little wire and a curved adjuster bracket and it is done.

Generator pulley is no longer available, I did find one in a salvage yard for $80 used (pulley only). Reman generators do not include the pulley.

Thanks again for the information. I knew there was a reason I bought a green tractor - and found this forum.

Dave / Believer45

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