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Farmall 140 NEED HELP Please.

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Aaron Eastworth

05-24-2007 06:56:57

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My uncle just gave me a Farmall 140. Now i'm not the best person to try an work on things like this but while my uncle was using the tractor he has a 12 volt battery with a 6 volt coil. He said this was ok and it has worked for him. Well i used the tractor for about 2 hours the other day and it worked fine until it started stalling and backfiring. I was told that it was because the coil got to hot and it needed to cool down. Well it has been several days now and the thing still will not start. It turns over great but it will never start. PLEASE HELP ME. Like i said i'm not the best to try to figure this thing out, give me a truck to work on and i'm fine but give me a tractor and it's like trying read a different language. Does anyone have any ideas on how to help me?

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Hugh MacKay

05-25-2007 06:12:28

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

Aaron: Having followed this thread, I somehow suspect the coil is not your problem, at least not right now. Points and condencer, maybe. Coils usually first act up when tractor is up to operating temperature, and soon as the tractor cools off it will run again. Points and condencer, here again the backfiring you mention, usually with bad points or condencer there is no fire, back fire or otherwise.

I think your timing advance is off, could be the distributor slipped or just maybe the distributor drive gears are stripped and distributor is not turning all the time, and not in time when it does. Take the distributor cap off try turning the rotor. In short you tractor is acting as though someone crossed 2 and 3 plug wires.

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Brownie450

05-25-2007 05:49:17

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

Check points & condenser first. Cheaper than a coil. [used to be]

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GA Dave

05-24-2007 20:05:39

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

I Googled GENESEE PRODUCTS (lower case)last year and printed out "Recommendations for 12 Volt Conversions". Followed all directions and have had no problems the last year. I did order the 3 ohm coil - Pertonix 40511. No ballast required. Look into this. Hope this helps. David.

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Hobo,NC

05-24-2007 19:04:02

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

Real 12v coil # IC14SB or a IC64 no resistor needed.

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CNKS

05-24-2007 14:07:06

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

I just bought a 12 volt coil with an internal resistor from NAPA $20 with the tax -- that is the easiest way to do it PROVIDED it is indeed the coil. If you have a 12 volt conversion and a 6 volt coil, you MUST use a resistor, otherwise you will fry the points. Many factory 12 volt systems use a resistor also -- my 460 is that way.

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CNKS

05-24-2007 14:10:51

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Re: Farmall 140 NEED HELP Please. in reply to CNKS, 05-24-2007 14:07:06

And, you will fry a 6 volt coil also, if you have 12 volts without a resistor.

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Andy Motteberg

05-24-2007 11:55:07

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

It does not matter if it is 6 volts or 12, it works either way. Put on a new 12 volt oil filled coil.

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Aaron Eastworth

05-24-2007 12:20:20

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Re: Farmall 140 NEED HELP Please. in reply to Andy Motteberg, 05-24-2007 11:55:07

Ok, i'll give it a try. Thanks everyone for helping with this, you have all been great.

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Nat 2

05-24-2007 10:45:00

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

The same principles apply to a tractor engine that apply to your truck's engine. Basically, any "difference" is all in your head.

You know how to check for spark in your truck. Same technique applies on the 140: Pull a plug wire and crank the engine over.

The coil is probably blown from being run on 12 Volts. Go to NAPA or tractor supply and get yourself a 12V coil "no ballast resistor required." Problem solved.

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Aaron Eastworth

05-24-2007 11:31:36

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Re: Farmall 140 NEED HELP Please. in reply to Nat 2, 05-24-2007 10:45:00

I may be wrong but wouldn't a 12 volt coil burn up the points?

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Nawlens_Gator

05-24-2007 09:52:25

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

That coil hooked to a 12 volt battery probably needs a ballast resistor. There are threads on here (hit search) describing the proper wiring when switching from 6 to 12 volts. Easiest thing is to buy a coil that doesn't need a resistor (About $20 - $40 at NAPA). It will state this on the coil.

Sounds like either your coil or points are bad. Could also be a loose/corroded wire somewhere. I switched to electronic ignition on my 140's when I got tired of fooling with the points and timing. I highly recommend it.

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chadd

05-24-2007 08:37:08

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

I am no electrical expert here, but I would guess that either the heat from running 12V through a 6V coil finally cooked the coil or that the coil created a much hotter spark than the ignition system was designed for, and you burned up the ignition points. Take off the distributor cap, remove the black dust cover underneath and pull out the points and look at them. If they are black, pitted, or have material transferred from one to the other, they have been cooked. You can test it by cleaning them up with extra fine sand paper and alcohol and reinstalling them. If it will run again for a while (until they burn again) that is your problem. If that is the case, you may want to consider putting in a resistor.

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Aaron Eastworth

05-24-2007 08:50:54

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Re: Farmall 140 NEED HELP Please. in reply to chadd, 05-24-2007 08:37:08

Thank you i"ll give that a try.
There is however a regulator already on the tractor. Does anyone the correct wiring for it? It could be possible that when my uncle put it on it was wired wrong.

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Jim Becker

05-24-2007 07:46:10

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Re: Farmall 140 NEED HELP Please. in reply to Aaron Eastworth, 05-24-2007 06:56:57

I suppose this reply won't be helpful, but.

A coil is a coil, a volt is a volt and an engine is an engine. Some tractors were built using truck engines. Just pretend you are reaching over a fender and diagnose your igniton system just like it was a truck.

There isn't any magic.

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