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Farmall & IHC Tractors Discussion Forum
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W-4 charges at 1/2 throttel and above

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Bob Quale

09-01-2003 07:09:12




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My charging system finaly seems to be working, but it doesn't charge until about 1/2 throtle and above. Does that seem Ok?

Bob




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Bob Quale

09-01-2003 20:30:08




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 Re: W-4 charges at 1/2 throttel and above in reply to Bob Quale, 09-01-2003 07:09:12  
Thanks, I'm gona get a smaller belt and check the brush, It's amazing the knolege on this board!

Bob



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Bob M

09-01-2003 10:00:06




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 Re: W-4 charges at 1/2 throttel and above in reply to Bob Quale, 09-01-2003 07:09:12  
Bob - Assuming no other electrical load beside the ignition coil, the generator should begin charging around about 1/4 throttle or so. Could be the generator's turning to slow as Tim V suggests. You can replace the existing drive belt with one a bit shorter, then open up the generator pulley halves to fit the belt. This will spin the generator faster and make it begin to charge at slower engine RPM's.

Could also be the generator 3rd brush needs adjusting. Moving it closer to the nearest fixed brush will cause generator output to increase.

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TimV

09-01-2003 08:35:41




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 Re: W-4 charges at 1/2 throttel and above in reply to Bob Quale, 09-01-2003 07:09:12  
Bob: It's very possible that below half throttle you have one of two conditions--either the amount of juice required to run the tractor is more than the generator (I assume it's got a generator, not an alternator) is producing, or that the generator does not become excited until the RPM's are above half throttle. It shouldn't be a problem, but if it is, you could look at putting a smaller pulley on the generator.

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