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Tractor Talk Discussion Forum

Is it a coil problem?

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Pibou

10-08-2004 18:19:44




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I have an 1958 International 240 utility tractor. It was getting harder to start it, so I changed the points, condenser. Now I don't have any fire at the plugs or the points. I suspect the coil.I have used a test light to check to see if there was fire and I got fire on both side of the resistor right up to the positive terminal of the coil. When the key is on, should there be fire to both terminals on the coil, right up too the points? I have tried 3 used and a brand new coil and I still don't get any fire on the wire going from the - coil terminal to side of the distributor. Any help would be greatly appreciated, thanks.

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Bigdog

10-09-2004 07:42:15




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 Re: Is it a coil problem? in reply to Pibou, 10-08-2004 18:19:44  
He says he has no voltage reading on the wire from the points to the coil. That tells me the points either are not opening or that the lead from the condensor or the lead from the coil is shorting to ground or the points are not opening. There should be a voltage there but only when the points are open. It is real easy to inadvertantly short one of those terminals to ground when connecting to the points. Glazed over or coated points would allow a voltage reading to be present, not absent as he describes.

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ferrell freeman

10-08-2004 20:01:02




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 Re: Is it a coil problem? in reply to Pibou, 10-08-2004 18:19:44  
Some manufactors have used wax or plastic to coat the points . Also the amount of chrome used on them, have to rub the back so they can better ground. The condenser even new could be bad,might put the old condenser back in and try it,i,have seen new ones bad.



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DL

10-08-2004 19:29:56




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 Re: Is it a coil problem? in reply to Pibou, 10-08-2004 18:19:44  
might double check that your point gap is set correctly.
regards, DL



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Bigdog

10-08-2004 18:43:12




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 Re: Is it a coil problem? in reply to Pibou, 10-08-2004 18:19:44  
There will only be voltage at that point when the points are open. The coil grounds through the points so that terminal will read zero volts most of the time. Re-check your connections to the points and condensor. you may have one of the leads shorted to ground thus the points will never read open.



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lucas boy

10-08-2004 19:18:51




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 Re: Is it a coil problem? in reply to Bigdog, 10-08-2004 18:43:12  

sometimes you have to clean new points with some fie emery.. lucas



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RN

10-08-2004 19:52:03




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 Re: Is it a coil problem? in reply to lucas boy, 10-08-2004 19:18:51  
Clean points? Some points sets may have a thin wax/grease coating for rust protection- I have had good luck on motorcycle and old VW points using coleman fuel and piece of brown paper bag to clean contact area. Also used on old points with dirt and oil film. CRC electroclean spray also usefull. Package may have instruction note to clean with white gas or cleaner when installing- have seen Bosch and Nippondenso boxes with notes. RN.

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lucas boy

10-08-2004 20:16:46




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 Re: Is it a coil problem? in reply to RN, 10-08-2004 19:52:03  

new kohler brand points have instructions to clean them before installing.. lucas



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UncleTom

10-09-2004 06:02:19




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 Re: Is it a coil problem? in reply to lucas boy, 10-08-2004 20:16:46  
Make sure that the points are not to wide to the point that they will not close. UncleTom



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phipan

10-09-2004 12:50:19




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 Problem solved in reply to UncleTom, 10-09-2004 06:02:19  
I finally discovered my problem. The wire from the condenser was making contact with the distributor housing, in short grounding itself as if the points were closed. Thanks for all the help.



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