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Harry Ferguson Tractors Discussion Forum

TEA 20 Wiring

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VT John

06-03-2007 15:57:29

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I an rewiring my TEA-20 to us a 12 volt system with one wire alternator. I have observed many concersion kits for sale but none for the TEA-20. Another problem is that my tractor keeps burning up coils.

Based on previous infromation a NAPA IC-14SB Coil has been recommended.

I have also been told that a DELCO one wire alternator will work also but don't know the model number, any suggestions?

I would also like to add a Pertronix electronic ignition and coil but I want to get the coil burning-up issue resolved before I burn up the electronic igition modules.

I have on hand a new condenser.

I plan on wiring up the battery with the negative ground to the starter mounting bolt and positive to pushbutton switch mounted ont he dash.ignition switch would wire to the plus side of the coil with the negative side to the distributor.

Any assistance is appreciated
Any thoughts.

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John(UK)

06-04-2007 10:36:39

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Re: TEA 20 Wiring in reply to VT John, 06-03-2007 15:57:29

You won't need a condenser with an electronic ignition system, If you rewire the tractor that will take care of any problems that you have now. The alternator you need is a Delco 10SI that will work single wire, if you need a wiring diagram email me and ask me for it. You should consider fitting the safety starter switch instead of using a dash mounted one it is far safer, the one you have now may only need adjusting or cleaning.
fergusontractors(at)tiscali.co.uk
John

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Bob (Aus)

06-03-2007 17:58:29

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Re: TEA 20 Wiring in reply to VT John, 06-03-2007 15:57:29

Pertronix electronic ignition and coil - highly recommended. I installed a Petronix igniter and coil in my TEA20 Ser No TEA341439. Send me an email and I will email you the Petronix brochure that came with the igniter.

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VT John

06-03-2007 18:10:58

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Re: TEA 20 Wiring in reply to Bob (Aus), 06-03-2007 17:58:29

Thanks for the insight on the coil and electronic ignition. Can I ask what kind of a alternator you are using.

Mine is set up for 12 volt alternator and I would like to use a one wire alternator. Is this possible.

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Bob (Aust)

06-04-2007 01:32:06

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Re: TEA 20 Wiring in reply to VT John, 06-03-2007 18:10:58

John. I don't use an alternator - would not have one on my tractor! I have a standard Lucas 12 volt generator and Lucas voltage regulator. I think the Lucas generator is rated at 11 amps (132 watts) which, with normal running should be more than enough to keep a good battery topped up. If one has short running cycles, powering night lights or poor earth etc, then there may be some justification in fitting an alternator.

With the Petronix igniter, engine and tune in good condition, the engine starts in less than one revolution and purrs like a kitten! And so it should - their coil puts out over 40 KVolts! When time permits I want to experiment with wider plug gaps (maybe 40 thou plus?) which should give far more complete fuel ignition and more power.

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