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Farmall & IHC Tractors Discussion Forum
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SH Throttle

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mwilke

11-20-2007 09:16:53




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The throttle on my SH is not working correctly. I cannot get the throttle to smoothly slow the engine. In order slow the engine I have to push the lever quickly and all the way and adjust back to keep the engine from dying. To speed up the engine I have to do the same process. I suspect something in the governor is not right. Any help would be appreciated.

Mike




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Pat-CT

11-20-2007 13:04:37




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 Re: SH Throttle in reply to mwilke, 11-20-2007 09:16:53  
if it were mine i would make sure the linkages are correct just becuase its the simpleist i would start running sea foam in my gas becuase it keeps everyhting clean and put some in the oil if you tractor has no gunk depositas becuase it WILL knock the lose and i would tkae the govner plate off and clean everthing out with brake clean and cuetips then look to see if the govner is malfunctioning



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Janicholson

11-20-2007 09:39:42




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 Re: SH Throttle in reply to mwilke, 11-20-2007 09:16:53  
I would start with the throttle shaft and use carb cleaner on it to remove gum and deposits. I would proceed to the remaining governor prts looking for binding. How did this start, or was it progressive? JimN



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mwilke

11-21-2007 05:25:13




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 Re: SH Throttle in reply to Janicholson, 11-20-2007 09:39:42  
The problem existed when I bought the tractor. So I have no history to work with.



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Janicholson

11-21-2007 06:47:45




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 Re: SH Throttle in reply to mwilke, 11-21-2007 05:25:13  
To clean the throttle shaft in the carb it is necessary to take the carb off (a partial diagnosis and fix can be made by opening the two attaching screws that hold the governor tube to the top of the carb and looking inside.)
Inside you will find three metal tabs that interlock (moving the throttle). With your finger, try moving them a little and see if they are sticking. Pull the throttle open at the lever up by the steering wheel, and see if they now are in a different position (have someone move it while you watch). if stickie, using carb cleaner in that opening might help one half of the issue (the other end of the shaft is on the other side of the carb, and cannot be reached W/O taking the carb off. If it still binds, there may be issues in the tube, the right angle connection to the left, or the governor itself. Do not modify things with bigger springs or tapping with intent to bend!!! Good luck, JimN

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