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JD 420 C (or 430) Crawler help!

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Jay B.

11-19-2001 17:02:38




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Guys, I'm working on a JD 420 or 430(can't remember now) crawler, and need to know 2 things. 1 How to operate it, (pedals, clutches, throttle, etc... and what kind of charging system did it have? 6 volt or 12 volt? when i found it, it had a generator and a 12 volt battery positive grounded.. what way should it be? Jay B.




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MIKE HANLEY

11-19-2001 21:46:47




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 Re: JD 420 C (or 430) Crawler help! in reply to Jay B. , 11-19-2001 17:02:38  
Hard to say what you have. 420/430 left the factory 6V NEV ground,,,,, but,,, a 12V gen NEV ground and a 12V battery will work on a 6V starter if you don't grind on it MAKE SURE THAT WHAT EVER THE SIDE OF THE BATTERY IS GROUNDED, THAT THE COIL IS GROUNDED TO THE DIST THE SAME WAY. Nev ground battery, nev mark on the coil to the dist. Pos ground battery, pos mark on the coil to the dist.
Other wise your will burn up points before there time. When I got my 430C it had a 12V alt and a 12V battery but still had a 6V starter. Last week when I took the alt in to have it worked on, I took the starter along and finally had it rebuilt to heavy duty 12v. Go to you J.D. dealer and get a operators manuel, parts book, and a tect manuel. And write in the books any any all changes you make. The best money you will evey spend!!!!! !!!!!

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MIKE HANLEY

11-20-2001 19:16:52




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 Re: Re: JD 420 C (or 430) Crawler help! in reply to MIKE HANLEY, 11-19-2001 21:46:47  
OPPS, I am getting old and the mind is going...additional info..... You may also have a 6V coil. if so put in a resistor in the wire running from the switch to the coil. Again it will work but will burn out before it's time. Buy using a resistor you can use stock J.D. coil, points and plugs.
the Debuque tractors were total 6V battery through plugs. The later Waterloo tractors all have a resistor mounted in ths dash with a by pass so it is 12V with 6V ign. When they start, the starter button by passes the resistor and shoots 12V to the coil, points and plugs. When you release the starter button the juise goes through the resistor and then it runs on 6V. There are alot of those tractors out there that have been rewired wrong and are running 12V to a 6V coil.

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L.C.

11-19-2001 17:56:21




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 Re: JD 420 C (or 430) Crawler help! in reply to Jay B. , 11-19-2001 17:02:38  
The original setup was 6 volt, positive ground with a generator.



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