[AT] question on use of resistor on coil

[CEE VILL]

Ditto on all of Dean's statements.  I do not have the JD knowledge, but IH 
used the same start on 12, run on 6v system for a few years as did GM cars 
and Mopars. They are normally fed from a 12v source.  My IH 340 and Farmall 
560 both have the resistor system.  Strong possibility your 6 volt supply 
will not fed a 12v coil enough to get very much out of the coil.  Good  
luck.

Charlie V.

>From: Cecil E Monson <cmonson at hvc.rr.com>
>Reply-To: Antique tractor email discussion group 
><at at lists.antique-tractor.com>
>To: Antique tractor email discussion group <at at lists.antique-tractor.com>
>Subject: [AT] question on use of resistor on coil
>Date: Sat, 23 Oct 2004 07:18:52 -0400
>
>	I've been trying to get my JD 420 crawler to start after sitting
>all summer. At first I had no spark. With the loader down and the hood
>on the tractor, it is almost impossible to get to the coil and to where
>you can see to work on the distributor. I took the hydraulic connections
>apart yesterday and got the hood off. Substituted a new coil for the old
>one without success. Took the cap and rotor off the distributor and used
>a "point file" I got at Sears to clean up the points. Now I have a sort
>of yellow spark when I lay a spark plug where it is grounded and crank
>the engine over. The yellow spark indicates to me it is a weak spark
>or still bad contacts at the points.
>
>	The question is - the coil came out of the box with a note saying
>it must be used with a resistor but no resistor is there. I figured that
>being as it is marked 12 volts on the coil and I'm using it on a 6 volt
>system, I should not need a resistor. Is this true or do both 6 volt and
>12 volt systems use the same coil with a resistor?
>
>	Another question is that I can feel pitting on the points on one
>side when I run the file over them. Would you just change out the points on
>general principals?  I have already changed out the condenser as I 
>initially
>thought it might be the problem.
>
>	In case someone wonders about fuel, I smell gas in the exhaust when
>cranking so it is getting gas.
>
>Cecil
>--
>The nicest thing about telling the truth is you never have to wonder
>what you said.
>
>Cecil E Monson
>Lucille Hand-Monson
>Mountainville, New York   Just a little east of the North Pole
>
>Allis Chalmers tractors and equipment
>
>Free advice
>
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