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im lost!
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- Buzzard Wing
- Cub Pro
- Posts: 10540
- Joined: Mon Aug 09, 2004 10:14 pm
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Re: im lost!
Generally, coils are 6V unless they have a ballast resistor built in. So the 'Mopar' resistor should be installed. I have run a 12v Cub without a resistor and it will just quit when it's too hot. After it cools, it would work again. I ended up replacing the coil with a pricey 'Pertroincs' (the electronic ignition folks) with a resistor.
The manuals are silent about the resistor for some reason.
The manuals are silent about the resistor for some reason.
1971 Cub (Rufus) 1950 Cub (Cathy) 1965 Lo Boy Fast Hitch (Nameless III) 1970 Cub 1000 Loader & Fast Hitch (Lee)
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- 10+ Years
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- Joined: Sat Apr 07, 2012 3:12 am
- Zip Code: 40508
Re: im lost!
the magneto has an external coil on it. the battery is dead i do not believe any charging will fix it. i hooked up a spark tester and turned the engine over repeatedly as quickly as i could and the tester didnt spark. that is after i replaced the ignition wires condenser, points and cap. then i took off the coil and it was very corroded on the inside i haven't checked for spark again. it seems like if the part or resister in question is not one it wont burn up the coil or atleast not too quickly. the possible resister one end is connected to the positive side of the coil. the other end of the resister which says "bat"is connected to the ignition switch and to the plug which goes into the alternator. i do have a multimeter. the possible resister doesnt have an adjusting slot on the bolt. thanks for the help and sorry for the confusion
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- 10+ Years
- Posts: 60
- Joined: Sat Apr 07, 2012 3:12 am
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Re: im lost!
i believe it might be a variable resister. i didnt see an adjustable notch but it certainly looks like one
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- Team Cub Mentor
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Re: im lost!
First thing, next thing, only thing, Fix the battery problem. The ignition system, distributor or magneto with external coil, will not work without a good battery. It's like a car, dead battery and the car won't start or run.
I have an excuse. CRS.
- birddog
- 10+ Years
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Re: im lost!
I'm not familiar with an external coil on a Mag, but if it's a Mag, it shouldn't be hooked to the battery in any shape or form should it?
Mark "birddog" Birdeau
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- Team Cub Mentor
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Re: im lost!
The external coil in an inexpensive fix when the magneto coil ceases to function. The magneto internal coil is either removed or disconnected. The magneto's remaining points, condenser and impulse coupling are utilized.birddog wrote:I'm not familiar with an external coil on a Mag, but if it's a Mag, it shouldn't be hooked to the battery in any shape or form should it?
The external coil is connected to a standard on/off ignition switch and the battery.
I have an excuse. CRS.
- Rudi
- Cub Pro
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Re: im lost!
This is David's ballast resistor:
doesn't look adjustable to me. Different.
doesn't look adjustable to me. Different.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship
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- Team Cub Mentor
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Re: im lost!
Photos in previous post. Probably a ballast resistor. But where do the connecting wires go? Usually a ballast resistor is wired in series with the coil. See wiring diagram in following link for typical 12 volt alternator conversion.
http://s101.photobucket.com/user/farmal ... sort=4&o=3
http://s101.photobucket.com/user/farmal ... sort=4&o=3
I have an excuse. CRS.
- Rudi
- Cub Pro
- Posts: 28706
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- Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger - Circle of Safety: Y
- Twitter ID: Rudi Saueracker, SSM
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Re: im lost!
David:
Ok, I am going to make a suggestion that should eliminate all the extraneous junk on your Cub and simplify it. Suggest that you invest in a new IH Farmall Cub Tractor Magneto Coil
I would hope that the old coil is still in the magneto. If so, then save the core as they are NLA. Then buy yourself a new 6 volt battery. A Group 1 or a 19L will fit nicely into the battery box. Rewire according to the schematic:
This will return your Cub to it's original configuration.
Ok, I am going to make a suggestion that should eliminate all the extraneous junk on your Cub and simplify it. Suggest that you invest in a new IH Farmall Cub Tractor Magneto Coil
I would hope that the old coil is still in the magneto. If so, then save the core as they are NLA. Then buy yourself a new 6 volt battery. A Group 1 or a 19L will fit nicely into the battery box. Rewire according to the schematic:
This will return your Cub to it's original configuration.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship
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- Team Cub Mentor
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Re: im lost!
It's going to be terribly expensive going back to a 6 volt electrical system and then buying a coil for the magneto.1990caprice wrote:it has a delco alternator installed
Zip code says Lexington, KY. Suggest planning on, attending a near by Cubfest. Trailer the tractor. There will be experienced Cub folks there who can figure out your wiring, diagnose problems, provide excellent instruction.
With out a hands on visual inspection and some test equipment, it is impossible to tell how the tractor is wired and what is going on.
Battery problem solved yet?
I have an excuse. CRS.
- Rudi
- Cub Pro
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1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger - Circle of Safety: Y
- Twitter ID: Rudi Saueracker, SSM
- Location: NB Dieppe, Canada
- Contact:
Re: im lost!
Darn, I forgot that. David -- forget my last.
The above schematic shows how your Cub should be wired with an alternator. Suggest you rewire as shown. See if that improves the situation. If not, then change out the resistor to say the Mopar or it's equivalent from Chevy, Ford, Stud etc... whatever your preference.
Eugene's suggestion to attend a CubFest is a good one .. CubFests and Gatherings Calendar 2013. It appears the Buckeye CubTug & Ohio CubFest Reunion might be the closest one August 9th and 10th.
The above schematic shows how your Cub should be wired with an alternator. Suggest you rewire as shown. See if that improves the situation. If not, then change out the resistor to say the Mopar or it's equivalent from Chevy, Ford, Stud etc... whatever your preference.
Eugene's suggestion to attend a CubFest is a good one .. CubFests and Gatherings Calendar 2013. It appears the Buckeye CubTug & Ohio CubFest Reunion might be the closest one August 9th and 10th.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship
- birddog
- 10+ Years
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- scotlem
- 10+ Years
- Posts: 845
- Joined: Thu Oct 12, 2006 8:52 pm
- Zip Code: 02852
- Location: RI, North Kingstown
Re: im lost!
In the mean time if the cub was working the way its wired now, for years. Then it wouldn't hurt to find out if it will continue to work with a new battery. You have to have the battery to generate a spark if its no longer the mag generating it. If I'm following this right
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- 10+ Years
- Posts: 60
- Joined: Sat Apr 07, 2012 3:12 am
- Zip Code: 40508
Re: im lost!
i am getting a new battery. i will also go through those schematics. thanks for ya'lls patience and help
- bob in CT
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Re: im lost!
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