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Harry Ferguson Tractors Discussion Forum
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TO35 idle speed

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Dean Logan OH

11-14-2004 15:15:56




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I know the manual says idle speed should be about 450 rpm but with the idle screw backed all the way out it stays at 1200 rpm. Is the govenor causing this ? Should I adjust the gov first then the carb ?




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gshadel

11-15-2004 06:29:20




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 Re: TO35 idle speed in reply to Dean Logan OH, 11-14-2004 15:15:56  
Dean, sounds like your trouble is probably linkage related. I'm more familiar with TO20's and 30's, but I'm guesing TO-35's linkages are similar.

Try disconnecting your throttle linkage going to the carb, and holding it manually with the engine running. You should be able to feel when the throttle is closed, check your RPM's, and adjust the idle speed set screw. Get you idle where you want it and hook the linkage back up. If the idle is off, definitely a linkage problem.

Hope you have a manual, the sequence for adjusting the throttle linkages and governor linkages is too complicated for me to type - up here, and I don't remember all of it off the top of my head anyway. The main thing though, you have to work through the whole sequence from the beginning, and in order, adjusting each linkage... they are all interconnected, adjusting one may just throw off another. You can try just lengthening the throttle linkage to the carb to see if that helps your idle, but it may impact how the governor reacts, or it take away some top end RPM's. Really recommend adjusting all of them the way the manual says.
I'm in Morrow Co., where you at?
Good Luck

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Dean Logan OH

11-15-2004 07:17:16




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 Re: TO35 idle speed in reply to gshadel, 11-15-2004 06:29:20  
Im just outside Logan OH. Yes, I have a manual and yes it is a rather complicated procedure which I was hoping I could avoid.Looks like I'll just have to get on with it.



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gshadel

11-15-2004 13:04:02




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 Re: TO35 idle speed in reply to Dean Logan OH, 11-15-2004 07:17:16  
Hey Dean, I don't get down to Logan much any more since I moved up here to Marengo. Good luck with that idle. Once you think you got it, recheck your high end RPM's. I spent days trying to get my idle lined out... only to find out my top end RPM's was only 1300 RPM's. Never new it until I got my new tach. I guess ignorance is bliss.



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txblu

11-15-2004 07:46:46




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 Re: TO35 idle speed in reply to Dean Logan OH, 11-15-2004 07:17:16  
Have a couple of beers and look at it again. The governor runs the carburetor. The throttle just puts spring pressure on the gov. Line it by the book, not that hard once YOU decide you are going to do it. Would be amazed at how well it works.

Mark



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