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Farmall & IHC Tractors Discussion Forum
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F12 Magneto

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Kevin Hood

04-15-2005 12:27:18




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I have a F4 mag & it only impulses once per crank revolution. When it impulses, the coupling goes past the point where the other pawl should catch. I think it is going by it so fast that centrifugal force will not let the pawl grab. I can back the coupling up a little & it falls in. Then it only impulses on that side. Any help is appreciated.

Thanks Kevin




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MagMan

04-15-2005 12:48:58




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 Re: F12 Magneto in reply to Kevin Hood, 04-15-2005 12:27:18  
Hi Keven I amnot an exspert with F4s but maybe I can help I beleve there pretty much the same as the H4s and others. are you cranking this off the tractor or on? I beleve they usally kick out at around 375 Rpms or simelar. What happens alot is the little peg that the trip finger rides on gets worn out and and the pawl also and lets it just slip by the peg. OR maybe the lock came off and the spring and washer if there the same as H4 I had one I tore apart today that did the same The little cotter lock came off alowing the spring and washer to take off into no where land and the pawl was just sitting in there not doing its job and rubbing on the bottom of the mount. Or the Pawl could be worn . Alittle weld on the tip sometimes can fix that. OR maybe the Pin that the pawl hits on. Usally they only wear out when the person runs them at to low of a RPM and the trip doesnt kick out and it wears out the pin. You can take it out and rotate it for that problem. Hope Maybe Some Of This Helps MagMan

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Kevin Hood

04-15-2005 13:44:42




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 Re: F12 Magneto in reply to MagMan, 04-15-2005 12:48:58  
When I have it on the bench & turn the coupling by hand, it works fine, because I have the coupling in my hand & it can't advance past the point where the other pawl catches. Would you mind me calling you?

Thanks, Kevin



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John M

04-15-2005 18:40:35




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 Re: F12 Magneto in reply to Kevin Hood, 04-15-2005 13:44:42  
Just how do you use the starting crank? If you have the crank pushed in,pulling up from 9:00 it will only click once if you pull it up towards 12:00,that is not one full rotation of the crankshaft.(Unless when you pull it up youre pulling the hound out of it.)Knowing how you try and start the tractor may help determine what your problem is.



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Kevin Hood

04-15-2005 18:52:04




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 Re: F12 Magneto in reply to John M, 04-15-2005 18:40:35  
That's the way I pull it, but it only impulses every other time. Thanks, Kevin Hood



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magman

04-15-2005 15:30:40




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 Re: F12 Magneto in reply to Kevin Hood, 04-15-2005 13:44:42  
No Go through the email deal and shoot me an email and I will give you my # Or maybe this will help you too.
http://www.cleancomputes.com/Cub/Blue%20Ribbon%20Service%20Manuals/GSS-5035%20Service%20Manual%20Magnetos/index.html



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