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Farmall & IHC Tractors Discussion Forum
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Super A Charging, needs flash; Followup

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scott#2

12-29-2007 17:16:00




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Got a chance to mess with it today. First off, its a 3 brush gen and 3 position light switch (off being one of the positions). This is a 1950 tractor.

I grounded the f term on the generator and she started charging, pulled it off and it stopped. Then while it was running I started tapping on the arm of the voltage/current relay (smaller relay, even though it was already making contact) and the cutout relay closes and it starts charging. Back the throttle off and it kicks out, just like it should. Even though the smaller relay (voltage/current) was making contact, it still wouldn't close the cutout relay until I opened the contacts and let them close a few times under its spring tension. I went back to tapping on the smaller relay, opening and then letting the contacts close and the cutout closes and it starts charging, without fail every time. I drug some 400 emery through the points of the voltage relay (couldnt find any of my dozen or so burnishing tools after looking a half hour) and it appears to be a bit more reliable but still wont charge on occasion. Then I started cycling the light switch while it was running and sometimes it starts charging and sometimes not, almost seems load dependent. Gen puts out good voltage, I didnt get a chance to run through all the instructions in the last post you all responded to, cold and dark out. It just seems to me that the smaller relay, for some reason isnt making good enough contact to close that cutout and send volts to the batt. New regulator, new batt, this was the tractor that I completly restored 2 years back, new harness, etc., all wireing is correct. I am begining to think a new regulator doesnt mean much, it was a Tractor Supply unit and worked fine for a week or so. Any ideas?

scott#2

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Vacherie

12-29-2007 21:12:57




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 Needs Flash??? in reply to scott#2, 12-29-2007 17:16:00  
What does "needs flash" mean?



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CityBoy-McCoy

12-30-2007 04:26:34




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 Re: Needs Flash??? in reply to Vacherie, 12-29-2007 21:12:57  
I believe by that term he means needs polarizing.



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John T

12-29-2007 19:21:22




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 Re: Super A Charging, needs flash; Followup in reply to scott#2, 12-29-2007 17:16:00  
Scott, much of what that regulator does is dependant upon it having its own good ground you know. I think Id run a good ground wire direct from the grounded batery post to its case n see how she acts then. If the VR's relay contacts need some tweaking like a gap thickness or spring tension that can be a lil tricky to describe over the net but being there n armed with the right equipment n specs it wouldnt be so bad. For now Id just double check all the wires n connections n ESPECIALLY the VR's ground n maybe as non abrasively as possible try more of that clean/buff/polish up the relay contact points cuz its not working that bad it dont sound like. Id still suspicion the condition of the set of relay contacts you already had to sand cuz once the shiny silvery coating is off they can be resistive n it dont take much to make them stop working correct.

Check the VR ground,,,,,clean/buff/polish the relay contacts,,,,, ,maybe use some contact cleaner on them once done,,,,, maybe tweak the adjustments just a tad,,,,,make sure the belts good n tight and the battery is okay n all connections n just run her a while n see if she settles in to her milk. If dead grounding the gennys FLD post makes her charge well but she dont otherwise, sounds like you still have a VR problem or a bad VR ground if none of the above helps. You might wanna clean up the gennys commutator n check the brushes n hold down springys, it dont sound like the third brush needs adjusted but it might not hurt to bump it up to a lil higher charge rate if its not already maxxed out

John T

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