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Hit & Miss Gas Engine Discussion

fairbanks morse light plant


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  #1  
Old 04-11-2014, 11:30:17 PM
Geist Geist is offline
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Default fairbanks morse light plant

I have a model 3 Fairbanks morse light plant and the contacts on the generator are not being drawn together, and when I push the contacts together it only puts out about 26 volts and it will not hold, what would cause that to happen, I checked the coil it seems ok, are the brushes bad? any ideas?
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Randy
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Old 04-14-2014, 02:24:06 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: fairbanks morse light plant

We need to see a picture of what you are talking about. By contacts, do you mean the 4 carbon brushes that ride on the segmentated armature? If so, they are held in brackets with coil springs that rest on the carbon and place tension by fitting into notches on the holders with the other end.
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Old 04-14-2014, 04:38:48 PM
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David M. Lyon David M. Lyon is offline
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Default Re: fairbanks morse light plant

If it senses that the batteries are fully charged the contacts won't stay because there is no load on the pull-in coil and the engine will die. (which is the way it is designed to work.) ....What are you using for batteries?
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Old 04-14-2014, 07:54:02 PM
Geist Geist is offline
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Default Re: fairbanks morse light plant

Thanks for your help, I got ahold of Generator Gus he told me to increase the speed of the engine, it was running about 400 rpms and when I increased it to 500 rpms that took care of it, now the contacts come together and they hold in, and now the generator puts out 38 volts
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Randy
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