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J D 60 POINTS. SHORT LIFE

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Ben.So/Tex

05-11-2002 19:59:52




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I dont use my 60 very often,The points seem to last about three tank full. Or about one year, I keep my tractors under a shed. Could I have a weak resistor? or what else. It has a delco remey dist on it.Thank Ben




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John T

05-11-2002 22:01:29




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 Re: J D 60 POINTS. SHORT LIFE in reply to Ben.So/Tex, 05-11-2002 19:59:52  
Ben, one possible cause of premature point failure is a bad condensor. Other possible causes are it may have been designed for a ballast resistor and 6 volt coil, and perhaps over the years the ballast went bad and was removed and never replaced, which means the points are drawing almost twice the current they were designed for (I have seen that happen alot). Do like clooney said and see what voltage of a coil you have and if it has a ballast resistor and if so, if its wired properly. Most later 60's and up had a ballast resistor in series between the ignition switch and used a 6 volt coil, so check her out and post back. Upcoming in Green Magazine Im authoring a few articles to explain all this which I hope helps. Good luck Ol John T in Indiana

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Clooney

05-11-2002 20:28:10




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 Re: J D 60 POINTS. SHORT LIFE in reply to Ben.So/Tex, 05-11-2002 19:59:52  
Ben, depending on the S/N, you could have a late 6 volt coil on an early tractor without a resistor, or the tractor cold be wired incorrectly, or you could have a bad condenser, or you could just be getting oxidized points from sitting, or?
~See if there is a voltage stamped into the coil [6 or 12]. Then if you have a volt meter see what the running voltage is at the coil terminal that is powered from the ign switch. If the coil is 12 volt it should have 12-14 volts at the power feed terminal, if it is a 6 volt coil it should have 6-8 volts [running] at the coil power feed terminal.
~On either coil the distributor side of the coil should show no more than 8-9 volts running or point damage will probably occur [you will probably need an analog meter to measure that side, as some digitals won't respond fast enough to measure the distributor side running voltage].
~If you have a 6 volt coil that is running at 12 or more volts you will need to add [or repair the wiring to yours] a ballast resistor or change to a 12 volt coil.

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Ben.So.Tex

05-12-2002 07:37:59




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 Re: Re: J D 60 POINTS. SHORT LIFE in reply to Clooney, 05-11-2002 20:28:10  
John T / Clooney,, Thanks. The coil has 12 volt 0n it..I will have to pull the dash to check the resistor if it has one..I will have to borrow a volt meter to check the voltage...Yes the points and condencer are oxidized(white flim)...My hand crank B does not want to start and I got a feeling that the points might be oxidized as well..Have a good day.Ben



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Clooney

05-12-2002 08:04:46




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 Re: Re: Re: J D 60 POINTS. SHORT LIFE in reply to Ben.So.Tex, 05-12-2002 07:37:59  
Ben, if the coil has 12 volts on it your points aren't burning from high current. ~What battery polarity are you running [what battery post is grounded?] The coil should have the same terminal going to the distributor that the battery has going to ground. If not change it.
~That pretty well leaves an incorrect condenser [are the points pitted or have a buildup on one side when they fail?]
~Or the points are just oxidizing from sitting.
~Do you keep the tractor outside?...If so try covering the distributor.
~You don't have to pull the dash to check for a resistor [you shouldn't have one with a 12 volt coil]. If the coil ign feed side is running at 12-14 volts you don't have a resistor.[sounds like an early 60]....
~If your coil is running at 6-8 volts you probably have a resistor & shouldn't have it with a 12 volt coil [if you have a resistor either install a 6 volt coil or by-pass the resistor]

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Ben.So.Tex

05-12-2002 19:52:46




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 Re: Re: Re: Re: J D 60 POINTS. SHORT LIFE in reply to Clooney, 05-12-2002 08:04:46  
It has the neg side grd on the battery//I will have to check the coil to see where the neg is connected//I keep my tractors under a shed, one side is open no doors// the points have a small build up on them when they fail, because they are kind of hard to file down (one sided) Thank a bunch this is some good info//The tractor is the early model//Thanks BEN



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John T

05-13-2002 06:38:37




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 Re: Re: Re: Re: Re: J D 60 POINTS. SHORT LIFE in reply to Ben.So.Tex, 05-12-2002 19:52:46  
Ben, since its been changed from factory original positive to now a negative ground, then the minus side of the coil is the side that should now go to the distributor. When you say it has 12 volts on the coil, do you mean it says that or a voltmeter reads that????? Some coils say on them "12 volts requires external resistor" (designed for an external ballast) while others read 12 volts only which are internaly ballasted. As I stated above, a bad condensor or excess current (improper coil or missing ballast where required) are factors in premature point burn ups. If it has a ballast resistor you can readily find it, its wired in series with the feed from the ignition switch to the coil, and it should read somewhere between 1.2 up to 1.8 ohms. If you can read the coils DC resistance between the small + and - terminals, it would sure help us. I think my third artice in Green Magazine might cover all this ballast stuff since we see so many questions on them here. Good luck, Ol John T

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