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Ford Tractors Discussion Forum
Show Parts for Model:

Jubilee Wiring

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Mark Benjamin

08-09-2013 07:50:27
65.111.219.23



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Hoping one of you experts can help me. I stripped all wiring (a real mess)and am rewiring. I"ve downloaded several diagrams from various sources and remain a little confused as to what I"m dealing with. I have a 12V battery so I"m assuming it"s been "converted" from a 6V system. Negative ground I think. I believe it still uses the three wire generator, not an alternator, but I"m not sure that"s possible?? There was no resistor coming from the coil so I"m guessing the coil is 12V. I"m understanding that there"s no "standard plan" but I"m hoping if you see the pictures I"m posting you can give me some tips of guide me to a diagram that will work.
This post was edited by Mark Benjamin at 08:56:32 08/09/13.

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cbrown9064

08-11-2013 07:46:31
207.191.133.203



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
To start with, that wiring diagram you have is not right...like Royse said. It appears to be from a later model diesel. You do not have a fuel gauge, etc... Also you have a one terminal starter solenoid and the diagram has two. So get rid of that diagram you are using.

Do you have a shop manual for the NAA? Both my I&T and Ford shop manuals have good diagrams.

You still have a generator, so the diagrams should apply.
The wiring will not "fry" going from 6v to 12v. It is the same gauge wiring. You will "fry" stuff like bulbs and voltage regulators.
We have a bit of a crap shoot going on here. We know it ran, but not if it charged. We don't know if it is a 6v or 12v coil. So, I would pull off the generator, voltage regulator and coil. Take the genny to a starter shop or parts store and see if they can test it. See if you can get part numbers off the vr and coil and cross reference them to see if they are 6v or 12v.
Once you determine what you have, you can use the original wiring diagram to put things back together. For example, if the vr is 6v, replace it with a 12v unit. If the coil is 6v, you can replace it or put a resistor inline to knock the voltage down (if it were me, I would put a 12v coil on it).

From the pictures you provided, things look pretty straight forward. Just a matter of determining what parts are on the tractor.
This post was edited by cbrown9064 at 07:47:44 08/11/13.

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Royse

08-11-2013 07:37:12
69.36.49.151



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
Generators are pretty durable. It also seems like if the parts were
already on there (and hooked up) when you were running it, if
they were going to fry they would already be fried, right?

It is possible to run the tractor on a 12V battery with no
charging system at all, and no 6V conversion at all.

Just unhook the generator and charge the 12 volt battery every so often.
Maybe that's what the previous owner did in this case, just left it unhooked.

If you know it was all hooked up before, you could check it for charging
by measuring the voltage across the battery terminal with engine off.

Then starting the tractor and check that same voltage.
The voltage should increase with the engine running to about 13.5V
It should not be sky high, nor should it decrease.

If you're not sure though, it is possible for something to fry trying that.

Is there a part number on that Echlin VReg you could look up
and see if it is 6V or 12V?

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Mark Benjamin

08-11-2013 06:46:26
65.111.219.23



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
Thanks Royce. Correct as to fuel gauge and ignition warning light. ALL of the electrical parts are what was on it and it seemed to do basically what it was supposed to. I drove it about three miles when I bought it... The lights were disconnected. I'm assuming the last owner didn't want to pop for 12V bulbs so didn't bother running new wire. I DID replace the battery pretty quickly after I bought it (12V) and it seemed fine so have ASSUMED it's been converted. I don't THINK the parts guy gave me a 12V instead of a 6V battery!!! From what little I understand, if I hooked-up a 12V battery to a 6V system I probably would have cooked some wiring, right??

Here's a couple picts of what I had to work with. It was a mess but it ran! The battery you see is a 12V.












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Royse

08-10-2013 19:37:48
69.36.49.151



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
"I have a few diagrams and I'm posting the one I think is closest"

It may not be close enough. Your Jubilee doesn't have a fuel
gauge or an ignition warning light. At least it shouldn't have.

"Question? CAN a 6V generator be used on a 12V conversion??"

Yes, depending on how the genny is wired and your voltage regulator.

Looks like you have an Echlin VReg, is it 12V or 6V?

Is the coil 6V or 12V? May not matter if you changed these parts.

Might be best to draw a diagram of what you have so far?

Many car parts stores or generator shops will test the genny for free.

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36 coupe

08-12-2013 02:41:17
66.231.194.185



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 Re: Jubilee Wiring in reply to Royse, 08-10-2013 19:37:48  
A 6v generator hooked to a 12v battery will explode the battery.The 12v regulator will put too much voltage on the generator field.That generator in the pix is a 6v unit.Low output, 15 amp at best.



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Mark Benjamin

08-10-2013 07:05:58
65.111.219.23



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
Thanks guys. I drove this tractor home a couple years ago when I bought it and actually put it to work a few times before I ran into troubles with engine, etc., and decided to rip into it. Attaching a few pictures of what I was working with. The charging system seemed to be OK so I know the cobbled mess of wiring somehow worked! I have a few diagrams and I'm posting the one I think is closest EXCEPT I don't see the wire from the coil... Never been really great with wiring so starting to get frustrated. Want to make her run after a complete engine rebuild before I put the sheet metal back on!

Question? CAN a 6V generator be used on a 12V conversion??


This post was edited by Mark Benjamin at 07:09:51 08/10/13.

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36 coupe

08-12-2013 02:46:53
66.231.194.185



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-10-2013 07:05:58  
The answer is NO.Try it if you want to see a 12 volt battery explode.I have posted the info on a 55 chevy that blew up 2 12v batteries.One was brand new.



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soundguy

08-09-2013 16:38:37
207.30.46.70



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
tht genny casing appears to be from a 6v ( non vented ).. not saying it could not have been rebuilt as a 12v though.. you need to find that out...



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Mark Benjamin

08-09-2013 12:25:34
65.111.219.23



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
Thanks Guru. Trying to post pictures but seem to be having a rough time. I'll keep trying...











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36 coupe

08-12-2013 03:06:31
66.231.194.185



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 12:25:34  
You have a black wire at the regulator armature terminal.AT THE GENERATOR THE BLACK WIRE GOES TO THE GENERATORS GROUND TERMINAL.Get the wiring straightened out and put a 6 volt battery back in.Dufus has wired that tractor.My 640 has worked fine on 6 volts since 1954.Timing should be checked on the engine,Distributor looks out of position.Point block looks like black plastic, junk points.



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old

08-09-2013 14:15:12
209.86.226.19



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 12:25:34  
GURU is what they use but me all I am is a guy who has been working on cars and trucks and tractor for years as a hobby. By the way yes that is a generator which is something I do not ever mess with I switch them out to alternators. But yes it could be a 12 volt generator



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old

08-09-2013 09:18:34
209.86.226.40



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 Re: Jubilee Wiring in reply to Mark Benjamin, 08-09-2013 07:50:27  
First thing you have to do is to figure out what charging system you have since wiring a generator is not the same as alternator. A generator is long as in about a foot and looks a lot like a starter motor. An Alternator is half that long and bigger around. An alternator is also going to look sort of like aluminum since most are made with cast aluminum



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