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Generator gets hot just sitting there

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Joe

04-07-2002 19:34:00




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i just put a new regulator on my generator and about 3 hours later i decided to go check to see if anything is hot and the generator was! whats going on? every thing is hooked up right, not equiped with 3 way light switch, HELP




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Clooney

04-08-2002 16:49:14




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 Re: Generator gets hot just sitting there in reply to Joe, 04-07-2002 19:34:00  
Joe, just because the regulator is new doesn't mean it isn't defective..... ..... .
~You didn't say what year tractor, tractor model or the voltage of the system you are working with but:, If the cut-out points stuck closed after you polarized the generator, (once it has been polarized for the first time, after that all you are doing is applying power to the field coils & not polarizing it again) ..my guess is that you have a 6 volt regulator on a 12 volt system. ~The cut-out relay on a 6 volt regulator is set to cut-in around 5.9-7 volts. If you have a 6 volt regulator on a 12 volt system, and once the regulator (GEN) terminal or (armature post) has 12 volts applied to it, will close the cut-out relay due to the voltage being over 5.9-7 volts on the generator side of the cut-out relay. Once the voltage is flowing from the battery to the armature & field coils & as long as it remains over the cut-out setting of (5.9-7 volts) the generator side of the circuit becomes a "sneak circuit" & holds the cut-out relay closed. It will remain closed until the power to the regulator is cut for a few seconds or the voltage drops below cut-out voltage. ~To test for this condition: see if the generator (ARM) terminal has power (engine not running), if not, momentarily hook a jumper wire from the (BAT) terminal on the regulator to the (GEN) terminal on the regulator then remove it (just like you were trying to polarize it) , see if that makes the points stick & keep power applied to the (ARM) post, if so, then remove the battery supply going to the (BAT) terminal on the regulator for about 20 seconds then re-connect it & see if the (ARM) terminal on the generator looses power & stays off, if so you probably have the wrong regulator on your system. You might want to do this test a couple of times to verify the findings.
~The bottom line is; the voltage on the Generator side of the cut-out relay (armature post on generator) must be below the cut-out setting of the cut-out points (5.9-7 volts on a 6 volt regulator) (11.8-14 volts on a 12 volt regulator) or the points will stay closed & keep the generator powered up after engine shut down.....

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PROBLEM WAS THE SPRING RETURNING THE POINTS TO OPEN WAS OFF, NOW IT WORKS!! THANKS FOR YOUR TIME

04-08-2002 18:29:35




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 Re: Re: Generator gets hot just sitting there in reply to Clooney, 04-08-2002 16:49:14  
DF



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Clyde F

04-08-2002 12:28:22




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 Re: Generator gets hot just sitting there in reply to Joe, 04-07-2002 19:34:00  
Joe..
Your generator is trying to run like a motor due to stuck points in the regulator.The generator can't spin due to the fan belt so it gets hot.Look for - reading on the ampmeter to show discharge.



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GWH

04-08-2002 10:18:26




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 Re: Generator gets hot just sitting there in reply to Joe, 04-07-2002 19:34:00  
Hope you find your problem, but it is a good reason for having a battery cutout switch when these old tractors set around.



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John T

04-08-2002 10:11:47




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 Re: Generator gets hot just sitting there in reply to Joe, 04-07-2002 19:34:00  
Joe, if the generator is hot, its drawing battery current and trying to run as a DC motor but cant turn due to the belt and heating up and will overheat ur armature windings. Does it have an ammeter and is it showing a major current discharge??? The job of the Voltage Regulators Cut Out relay is to disconnect the generator from the battery when you shut down to prevent reverse current discharge. If those relay contact points stick closed, the gen will draw current and overheat as you describe. If the Gen and VR are miswired, you could get the same problem. Basically do as cloney said and the VR's Bat wire needs to get to the battery, usually through an ammeter. The Gen or Arm terminal goes to the generators armature post and field to field post. The polarize adn see what happens and post back. Ol John T in Indiana

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AFTER POLORIZING, THE POINTS STICK!,

04-08-2002 13:40:27




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 Re: Re: Generator gets hot just sitting there in reply to John T, 04-08-2002 10:11:47  
THE POINTS DONT STICK UNTIL I POLARIZE IT, THE REGULATOR IS NEW.



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Clooney

04-08-2002 03:26:01




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 Re: Generator gets hot just sitting there in reply to Joe, 04-07-2002 19:34:00  
Joe, for some reason battery voltage is getting to the (ARM) post [bigger of the two] on the generator.
~You either have a defective regulator, the wrong regulator or it is hooked up wrong.
~Polorizing has nothing to do with your problem, it can effect whether it charges or not, but won't effect battery disconnect (cut-out).
~There isn't a chance you put a 6 volt regulator on a 12 volt system is there?
~Probably the place to start is to make sure it is wired correctly. The wire coming from the ammeter (should have battery voltage at all times) gets hooked to the (BAT) terminal on the regulator,,,the load wire (if you have one) coming from the ignition S/W gets hooked to (L) terminal on the regulator (if your replacement regulator doesn't have an (L) terminal the load wire gets hooked to the (BAT) terminal with the battery wire from the ammeter,,,the (Fld or F) terminal on the regulator gets hooked to the (F) post [smaller of the two] on the generator,,,the (GEN) terminal on the regulator gets hooked to the (Arm or A) post on the generator {larger of the two].
~There should be NO other wires hooked to either the (GEN) or (F) terminals on the regulator.
~If the regulator is hooked up per above, use a volt meter or test light to check for battery voltage at the (ARM) post [bigger of the two] on the generator (engine off). If battery voltage is present with the engine off, you have the wrong regulator, or a defective regulator.
~As a first or final check: the (BAT) terminal on the voltage regulator should show battery voltage at all times but the (GEN) terminal should only show voltage with the generator spinning & not with the engine stopped..... ...

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Ray

04-07-2002 19:56:09




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 Re: Generator gets hot just sitting there in reply to Joe, 04-07-2002 19:34:00  
The points are stuck in the voltage regulator.
Are you sure you hooked them up right? Did you
polarize it?



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Yes ploarized, and hooked up right, i think

04-07-2002 20:15:24




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 Re: Re: Generator gets hot just sitting there in reply to Ray, 04-07-2002 19:56:09  



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