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Ford Tractors Discussion Forum
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Ford 641 12v conversion Questions...

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tysmobiletractor

03-06-2018 06:31:26




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I am going to do 12v conversion. Do I need a new voltage regulator?...

I see it is not included in the conversion kit offered on this site.

But I can order a new one in either 6v or 12v separately.?..

Any recommendations?...

I am doing a partial restoration. I want to upgrade what is necessary, but spend money unnecessaritly.?...

Also, I have had a few other complaints about conversion kits from this site. i would like to hear others opinions?...

Thanks so much. I appreciate your thoughts..

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gofast12

03-12-2018 13:02:21




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
That coil will eliminate the external resistor, just eliminates an extra part that could cause problems on down the road.



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tysmobiletractor

03-10-2018 21:32:42




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
What does upgrading to the coil mention do to the system?

I see some conversion kits come with a new coil, while others do not. ?

I know the 6v ignition works good. But wanting to know about options and upgrades.
I am concerned about quality and dependability.
Just not needless expenses.
Thanks



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JMOR

03-08-2018 11:34:18




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  



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JMOR

03-07-2018 20:18:02




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
Quoting Removed, click Modern View to seeFOR SURE!



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tysmobiletractor

03-06-2018 19:42:50




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
Thanks guys.

All very helpful info.



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Royse

03-06-2018 19:33:29




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
"I need to replace the wiring harness - replace the starter solenoid - rebuild the starter."

Actually, you don't need to do any of these things to convert to 12V.

You don't need to replace points, condensor, swithes, etc. either.

What I would replace is the coil. I'd use a NAPA IC14SB or

equivalent coil that does not require any external resistor.

If a coil comes in your kit, measure the resistance and see what it
is. The resistor that comes in the kit is not needed with the NAPA coil
(or equivalent) coils and may not be needed with the one in the kit.

Less connections to corrode, less things to go wrong.

You will also need to replace any/all light bulbs that are on it.
Idiot lights included and will likely lose the charge indicator with
the normal one wire conversion kit. For headlights/worklights,
I like LEDs. They provide more light and draw less current.

I can't remember off the top of my head if the 641 had a fuel

gauge, but it seems like it did. That too would need work.

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pinball

03-06-2018 19:12:03




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
No you do not need a voltage regulator. The alternator has one built in. There is nothing wrong with either 6 volt or 12 volt. Some people on here like originalty which is why they stay with 6 volts. that s fine. nothing wrong with that. 12 volt is a heavier system. It will last longer and due to equipment aging it will start a tractor easier. If both systems are charging correctly and your tractor is running correctly then either system is fine. There is a one line alternator and two line. just read the direction to get it hooked up correctly. one thing I do know in 1955 the cars went to a 12 volt system. It was heads above the old six volt. especially in cold weather. They have the 12 volt system today and its heads above the 12 volts system from 1955. I respect everyone on here for what ever voltage they want but when you get down to it its your call. good luck and if you run into a problem just ask. theres plenty of guys that knows more than I do and they will be glad to help you.

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tysmobiletractor

03-06-2018 09:41:34




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
Yes, I have more to learn. I have worked on these systems, but doesn't mean I know enough.

I need to replace the wiring harness - replace the starter solenoid - rebuild the starter. That said, other than adding a battery, it seems like the best choice is to convert all to 12v.
Is there a reason not to?

I know everyone has opinions. And I do know a good 6v system works great. But really, is there any reason to do these components in 6v?
Other than wanting original equipment. I know of no advantage.

But I am asking for a reason.

I don't know everything, and am asking.

I appreciate everyone who has an opinion on this.

Thank you.

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Ultradog MN

03-06-2018 16:39:00




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 09:41:34  
The 6v/12v debate is probably one that will go on forever.
My thinking is:
What voltage is on your daily driver, wife's car plus lawn tractor, outboard, camper, 4 wheeler, MC, ice auger, etc, etc?
Why have a 6v oddball that can't jump or be jumped by anything else.
Plus, 12v batts are cheaper and available everywhere.
12v lights, sprayers and doo dads are more available.
Assuming youre going with an alternator they are more reliable, put out more amps, require no maintenance, are easier to wire and last about forever.
If you are doing a fancy restoration you may want to keep it original but I cant see any other reason to stay 6v with a generator.

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soundguy

03-07-2018 16:24:18




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 Re: Ford 641 12v conversion Questions... in reply to Ultradog MN, 03-06-2018 16:39:00  
You know full well that you can jump most 6v tractors with a spare 12v vehicle handy...



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Ultradog MN

03-08-2018 09:19:06




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 Re: Ford 641 12v conversion Questions... in reply to soundguy, 03-07-2018 16:24:18  
It cuts both ways...
You likewise know you can't jump ANY 12V machine with an oddball 6V tractor.
Also, how many people know how to jump a 6V tractor with 12V without having a battery blow up in their face or getting themselves run over? In this day and age of dumbed down boys and men, safety devices galore and extreme litigiousness why would anyone advocate doing it?



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soundguy

03-08-2018 10:03:55




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 Re: Ford 641 12v conversion Questions... in reply to Ultradog MN, 03-08-2018 09:19:06  
Based on the questions I see posted here daily, I'd say there are about 10 of us that know how to do it. :(



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Ultradog MN

03-08-2018 11:02:57




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 Re: Ford 641 12v conversion Questions... in reply to soundguy, 03-08-2018 10:03:55  
It's not just here.



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soundguy

03-08-2018 12:06:33




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 Re: Ford 641 12v conversion Questions... in reply to Ultradog MN, 03-08-2018 11:02:57  
Your alien post was funny!.

Most O the other posts were sad...



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soundguy

03-06-2018 08:26:01




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
you might want to back up and ask for some help on that upgrade to 12v. Apparently you don't understand the relationship of the generator and regulator, and to an alternator with a built in regulator.



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sotxbill

03-06-2018 07:03:44




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
Assuming your putting in an alternator, with a built in regulator, out of one of the kits... then no, you dont.



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JMOR

03-06-2018 06:47:49




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 Re: Ford 641 12v conversion Questions... in reply to tysmobiletractor, 03-06-2018 06:31:26  
no



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