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Farmall & IHC Tractors Discussion Forum
Show Parts for Model:

7120 ele problem

Author  [Modern View]
Rod k in Iowa

01-18-2013 19:03:16
166.217.148.227



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With the key in the on position it reads acc and hrs as it does in acc position. When the tractor starts and the key returns to the on position the tractor stops. It is not the fuel solenoid or the key switch and I have checked the grounds. Any ideas?




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Jim Naden

01-19-2013 01:43:46
12.74.49.95



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 Re: 7120 ele problem in reply to Rod k in Iowa, 01-18-2013 19:03:16  

Rod k in Iowa said: (quoted from post at 20:03:16 01/18/13) With the key in the on position it reads acc and hrs as it does in acc position. When the tractor starts and the key returns to the on position the tractor stops. It is not the fuel solenoid or the key switch and I have checked the grounds. Any ideas?


Replace your cab solenoid.

In some instances you get a backfeed that energizes the ACC circuit with the key in the run position.
This post was edited by Jim Naden at 02:30:26 01/19/13.

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ihman73

01-18-2013 22:17:42
38.104.162.142



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 Re: 7120 ele problem in reply to Rod k in Iowa, 01-18-2013 19:03:16  
Try holding down the override button and start it. If it will run then I would hazard a guess that either the key switch or something in the self shutdown getup is causing your problem. I'm not a Magnum expert so that is about all I can tell you.



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Janicholson

01-18-2013 20:51:06
74.60.94.18



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 Re: 7120 ele problem in reply to Rod k in Iowa, 01-18-2013 19:03:16  
My best guess is that the key switch is at fault. The electronics will get a signal from both the ACC terminal and the on/run terminal. These two signals combined are interpreted by the system to display the run condition and provide fuel delivery.
When the on/run signal is missing, the ACC signal is still there, and the system goes to ACC display.
When cranking, the normal on/run signal is overwritten by the start signal. (this is just conjecture, as I do not have a schematic) Jim

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Rod k in Iowa

01-19-2013 15:50:46
166.217.148.227



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 Re: 7120 ele problem in reply to Janicholson, 01-18-2013 20:51:06  
Solenoid was the problem that was my feeling but was wondering what others thought, thanks for the reply.



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