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Harry Ferguson Tractors Discussion Forum
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Alternator Charging

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Barry from Stir

03-07-2006 04:06:01




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Good Morning Everyone
Can anybody tell me , does an alternator need a certain amount of RPM"s to operate properly? The reason I ask is that when I start the old girl, I notice that there is no movement on the amp guage what so ever. I take the throttle after I let her warm up a bit an open it right up, this is when the amp guage starts to show charging. I then back off the throttle to a comfortable idle, and all is well. The alternator is on a 1952 TEA-2085 and its a Dleco-Remy. Any thoughts would be great, Stay well everyone. Im off to the woods, its wood cutting time here in Ontario. Thanks,,, Barry

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Big Dean

03-07-2006 08:09:57




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 Re: Alternator Charging in reply to Barry from Stirling, 03-07-2006 04:06:01  
Hi Berry It sounds like you have one of the alternators that uses only one wire going to it. Those are excited by raising the RPMs to where the regulator is set to excite it.



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Barry from Stirling

03-07-2006 10:18:23




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 Re: Alternator Charging in reply to Big Dean , 03-07-2006 08:09:57  
Hi Big Dean
When I bought the tractor it had the Delco-Remy Alternator already on it, but had all these wires coming off it. I had a bunch of trouble trying to figure it out, and in doing so burnt it up. I took it to a Starter/Alternator Re-build shop and they fixed it for $100 Can. When I picked it up, it was all painted a nice silver colour, just like a new one would be. I noticed that there was only one wire coming out of it. I asked the guy at the shop where this wire goes? He said it as easy as punch, just put the wire to the positive side of the battery and your done. I thought, great, so I picked up an amp guage to put in the line to see if it was charging. Its just that recently I noticed that the tractor has to rev up quite a bit higher than normal to get it to charge. I guess Its right then,, Thanks Barry

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J2

03-07-2006 12:48:45




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 Re: Alternator Charging in reply to Barry from Stirling, 03-07-2006 10:18:23  
Our tractors generally run a lot slower than most cars (idles ~400 vs ~700) and the driving pulley (on the crankshaft) is even quite small conpared to most cars hence the alternator is almost always turning slower than optimal and the one wire version (with the internal "switch")doesn't "kick in" like it should. If you were to put a smaller pulley on the alternator, you may find that it works better. The only downside is that the belt may slip easier under load. You won't over rev it. J2

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