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Ford Tractors Discussion Forum
Show Parts for Model:

641 voltage

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jr1983

01-12-2018 12:17:09




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I'm getting some stuff around to start in on the wife's 641. Stupid question but is this thing supposed to be 6 or 12 volt? Been getting conflicting results. It is a gas engine. I'm asking because gauges are unreadable and it really only has a gen left. Electrical is not in good shape.




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mhb@ufe

01-13-2018 11:49:47




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
Quoting Removed, click Modern View to see

There are lots of opinions for both but you really need to make that decision for yourself as you are the one that will be dealing with it. I do believe if your wife will be using it she would be happier with the 12 volt system.

Mark



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pomester

01-13-2018 08:01:39




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
a good electrical shop can convert your 6v generator to 12v and provide you with the appropriate regulator that bolts right into the same location as original, or you can locate the appropriate diesel generator/regulator combo - -
the modified 6v generator will not be ventilated while the diesel 12v generator is - - I have two converted generators that see service on an operating farm and have never had trouble -
this does maintain stock appearance and I do like the ruggedness of the low-profile iron generator over the relative frailty of the exposed alternator conversion -
that said, there are a whole lot of alternator conversions operating out there, they certainly do work -
I do still have one 6v unit - it does fine or I would have converted it but the 12v conversions are much more 'energetic'...

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jr1983

01-13-2018 07:46:21




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
Yes I meant properly maintained 6v



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WayneIA

01-12-2018 20:29:19




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
Someone wellverst in automotive electricity should put a 12 volt alternator on it. Make a wiring harness to fit, which will than almost look like factory. Did this for a suburban dwelling grandson on an 860, plus electronic ignition, 4 years ago. Replaced a battery once ,by phone!!!



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jr1983

01-12-2018 16:00:40




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
So for the million dollar question. Do I convert to 12v or is a properly maintained 12 the way to go? I have the capability of making up to 0000 battery cable and I can tune an engine very well. I'm no ford expert so you guys tell me.



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rvirgil_KS

01-13-2018 07:36:40




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 Re: 641 voltage in reply to jr1983, 01-12-2018 16:00:40  
"So for the million dollar question. Do I convert to 12v or is a properly maintained 12 the way to go" (did you mean 6?)

If it were mine I would look at it this way: (1) do I want it to be 6 volt original with the likely prospect that I will continually be faced with the frustrating problem of finding a generator voltage regulator that will work and last
or
(2)do I do the one time conversion to an alternator and enjoy the improved reliability that it provides

If you change to alternator and have a charge indicator light and not an ammeter, be sure and get a 3 wire Delco alternator. Loop #2 to output, #1 to charge light, BAT wire from old regulator to alternator output and you are ready to go. You will lose your charge light with a 1 wire alternator.

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RM-MN

01-12-2018 14:21:25




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
The Ferguson TO30 that I own has been known to start at -30 with a 6 volt battery, but you really have to know what you are doing to make it keep running at that temperature.



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jr1983

01-12-2018 12:51:41




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
I asked the wife if she wanted it easy to use or original she said original. That said will a properly working 6v system start this thing in an IL winter? I want to make it a original as possible but I need it to work for clearing the drive.



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mhb@ufe

01-12-2018 13:36:04




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:51:41  
When everything is right they will start. The coldest I ever started my 6 volt 8N was a -20 cold Maine morning.

Mark



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mhb@ufe

01-12-2018 12:35:14




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 Re: 641 voltage in reply to jr1983, 01-12-2018 12:17:09  
It came from the factory as a 6 volt system. The diesels of that era where 12 volt.

Mark



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