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Allis Chalmers Discussion Forum

AC model WC magneto point gap

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07-28-2007 20:14:42

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HI, My neighbor is having problems with his three models WC tractors. The problem seems to be a magneto situation...I think he has the point gap set too close on one of the magneto"s and too far open on another. Does anyone know or have the factory specifications on what the gap should be set on for these tractors? One tractor is a AC model WC 1936 vintage...the other is the same model, but slightly newer. We have three magnetos, all three tractors run great using one of the magnetoes. None of the tractors run on the other two magnetoes. We opened them up and they look good, clean, no apparent problems...but I did measure the point gap and two of the three seem way out of the norm to me. Any help is appreciated.

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07-29-2007 07:52:12

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 Re: AC model WC magneto point gap in reply to Deamer1, 07-28-2007 20:14:42  
Thanks fellas, I'll relay the info and will provide feedback as to what the cure is/was.

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El Toro

07-29-2007 04:06:47

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 Re: AC model WC magneto point gap in reply to Deamer1, 07-28-2007 20:14:42  
third party image

With the two mags that won't start the tractors
and correcting the point gap doesn't help you probably need to check the magnets in those magnetos for magnetism. Touch the magnets with a flatblade screwdriver and the magnets should attract that screwdriver with a lot of effort. Here's an old Wico mag from a garden tractor that has dead magnets. If there's good magnetism you need to clean the points until nice and shiny and see if there's fire from the coil wire when you snap the impulse coupling. If there's no fire you could have a weak coil or a bad condenser. I would replace the condensers to rule them out. Hal

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07-28-2007 21:54:27

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 Re: AC model WC magneto point gap in reply to Deamer1, 07-28-2007 20:14:42  
I just looked in my I-T manual and pappy is correct

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07-28-2007 21:21:43

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 Re: AC model WC magneto point gap in reply to Deamer1, 07-28-2007 20:14:42  
According to the chart, points should be .020.
Check the menu to the left side of this page and click on 'Tune-Up Specs' for more information.

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