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Clooney Generator ?

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BottomD

04-13-2003 08:08:34




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My A#490500 had a gen on it when I got it but the wires were mostly gone,the regulator was mounted on the hood with wires gone I ran new wires had the gen done at a gen shop.I made a bracket for the reg.to mount on the gen got a new ammeter from john deere. The reg. looks like new on the inside and has a field bat. L. gen. I hooked this up the way you said a while back and ploarize got a spark but it won,t charge. I hooked this up pos. ground. could the reg.be neg. ground ? And if so could I just change the bat. terminals around and make it neg. ground repolarize and see if this works? When I turn the lights on it shows dis charge and I have a J.D.service manual SM-2000. thank you for your help BottomD.

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BottomD

04-14-2003 08:50:39




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 Re: clooney Generator ? in reply to BottomD, 04-13-2003 08:08:34  
I run the test this moring and put the lead wire from the F post under the mounting screw on the regulator this time it showed charge.I put my test light on the batt.and clamped to the little breaded wire that grounds the regulator it lights so it is getting ground it looks like I need a new regulator. I was just tuching the wire yesterday and it probubly was'nt getting good contack. Thank you very much for all your info I ran copys of all of it and will keep them in my book. BottomD

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BottomD

04-13-2003 12:33:34




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 Re: clooney Generator ? in reply to BottomD, 04-13-2003 08:08:34  
Did the running testwith the field postconnected same discharge did the motoring test gen. motors when I have the F term grounded and showes the same discharge when the F term.is removed the gen. stops and the amp.goes from 10 to20 discharge. Now theres one thing that I did'nt tell when I made the bracket for the gen.I had to tack it while it was on the gen.I had my ground hooked on to the bracket not the gen. Could that have done any thing bad? It was not on the tractor at the time.

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Clooney

04-13-2003 16:43:18




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 Re: Re: clooney Generator ? in reply to BottomD, 04-13-2003 12:33:34  
BottomD, it sounds like you have a generator problem. I doubt your welding did any damage unless you overheated a particular spot on the case.
~Can you give me a generator number? I presume it's a Delco generator? ~Bottom line is... your ammeter is showing a discharge so it has power, the [BAT] terminal on the regulator has power so you have power that far, the generator will motor so it has a ground, with the [A] post hooked to the [BAT] terminal & the [F] post grounded it completely bypasses the regulator & wiring between the two so it either has to charge, or you have a bad generator, or incorrect generator that has a different field control, or you are turning the generator backwards. Give me your generator number & I'll see if I have any data on it....

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BottomD

04-13-2003 10:31:16




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 Re: clooney Generator ? in reply to BottomD, 04-13-2003 08:08:34  
Shorted the F post to gen case no charge. Ran jumper from A post to bat terminal this showes a discharge? The gen. has two brushs and there is only one wire going to the ammeter from the bat.on the reg.and only one wire on the other post of ammeter to the neg bat. post. Dose this give any clues?



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Clooney

04-13-2003 11:34:09




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 Re: Re: clooney Generator ? in reply to BottomD, 04-13-2003 10:31:16  
BottomD, it sounds like the generator might be the problem. Do the same running test without the field post connected or grounded, if it still shows a discharge when the [A] post is jumpered to the [BAT] terminal pull the belt & wires then do a motoring test. If it doesn't show the same discharge suspect an open in the armature ground brush or internal wire.
~While doing the generator motoring test look at the ammeter to be sure it is showing a discharge, if it isn't showing a discharge suspect the ammeter isn't wired or reading correctly.

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Clooney

04-13-2003 09:20:42




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 Re: clooney Generator ? in reply to BottomD, 04-13-2003 08:08:34  
BottomD, even if the regulator is for negative ground it will work at positive ground [for a while]. The only real difference is the coating on the points as some are coated on only one side to reduce point burning & sticking.
~When you polarized it & got a spark that tells us right there that you at least have power to the [BAT] terminal of the reg, it also tell us that the armature circuit is at least powering up so the generator has a good ground.
~So that leaves an improperly wired ammeter [is the ammeter wired with ONE POST to the battery ONLY & ALL the other loads [wires] hooked to the non battery post?
~We still have to account for the field. The best way to test the field & for the possibility of an open in the regulator ground, or wire between the two is to do a running test.
~Make sure the ammeter is wired per above & will read both charge & discharge, then start the tractor & run at fast idle, then short the [F] post [smaller of the two ] to the generator case-[does it charge now?],,,if still no charge, leave the field grounded & run a jumper wire from the generator [A] post to the regulator [BAT] terminal-[does it show a charge now?]...If grounding the field shows a charge you have a bad regulator, open in the wire from the [F] on the generator to the [F] on the regulator, or bad regulator ground...If jumpering the [A] post on the generator to the [BAT] terminal on the regulator shows a charge you have failed regulator or open in the wire from the generator [A] post to the regulator [Gen] terminal.
~If nothing found so far re-check the regulator [BAT] terminal for power & that the ammeter is wired correctly. ~If might not be a bad idea to also re-check the regulator connections...[BAT] on the regulator to the NON-BATTERY side of the ammeter,,,[L] on the regulator to the light & ignition switch [bat] on the back of the ign switch],,,[F] on the regulator to the [F] on the generator,,,[Gen] on the regulator to the [A] post on the generator.
~If you suspect the generator, make sure if it has a 3rd brush & that the 3rd brush is rotated as far as possible in the generator turning direction.
~If still nothing found per above you might want to remove both wires from the generator, then remove the belt, then ground the [F] post on the generator & jump battery power from the [BAT] terminal on the regulator to the [A] post on the generator [it should motor], then remove the [F] ground [it should speed up].
~Post back with questions or on what you find..... .....

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