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Harry Ferguson Tractors Discussion Forum
Show Parts for Model:

Topic: generator /stumped
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Author  [Modern View]
terry kubiak

06-27-2012 03:19:11
184.56.131.87



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Need some help.
48 TE20 Had the Lucas generator checked.
New bearings, cleaned up .
Told it was charging.

Have it on.
" Flashed " the unit.
Have checked all the wiring,connections etc.
New battery
Charging light goes out once the tractor idles up.
How ever if I pull the battery cable loose when running the tractor will stop running.
Showing a slight charge across the terminals.
Is there a way to check just the generator output on the tractor.
other then the battery terminals ?
Armature to ?
Could the problem be the regulator?
If so what to look for?

Have read old posts but not seeing a way to check.

Thanks in advance.

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supergrumpy

06-27-2012 05:18:27
72.226.44.2



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Re: generator /stumped in reply to terry kubiak, 06-27-2012 03:19:11  
my 23C has Lucas generator

I put a voltmeter on the outer generator post

if I feed 12v to that smaller inner post I get max output on the outer post, voltage varies with rpms, have to watch out for overcharging

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Charles in Aus.

06-27-2012 03:58:11
211.30.43.34



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Re: generator /stumped in reply to terry kubiak, 06-27-2012 03:19:11  
Rpm should be about one third when removing the battery lead if you expect it to keep running .

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terry kubiak

06-27-2012 15:25:08
184.56.131.87



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Re: generator /stumped in reply to Charles in Aus., 06-27-2012 03:58:11  
Have the throttle up about 1/2 and it still stalls.

No one local can test a 6 volt generator.
Might have to take it about an Hr. away. drive.
That's why I'm wondering if it could be regulator related.
Points stuck ,etc.

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richardinnz

06-28-2012 02:07:04
125.239.167.54



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Re: generator /stumped in reply to terry kubiak, 06-27-2012 15:25:08  
Disconnect the D and F leads on the dynamo.
Put a jumper cable between the D and F terminals on the dynamo.
Connect a voltmeter between the now joined together terminals and chassis ground.
Start the tractor, the voltmeter will read voltage and the voltage will climb way above the rated voltage as you increase engine speed. If ok then dynamo o.k.
Re-connect the D and F leads on the dynamo, and move the jumper cable to the D and F leads at the regulator after disconecting them from the regulator, repeat the test on the D and F leads at the regulator, if the same then dynamo and leads o.k.

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terry kubiak

06-28-2012 18:26:38
184.56.131.87



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Re: generator /stumped in reply to richardinnz, 06-28-2012 02:07:04  
thanks will give it a try on Saturday and let you know the resuls

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