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John Deere Tractors Discussion Forum
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1935 model B governor

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Dick C

11-20-2003 06:48:55




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Over the past couple of years this tractor has lost much of its highr RPM. I have checked the carburetor linkage. It is OK. The carburetor itself is OK. I notice the governor shaft to its control arm has a great deal of rotational free play, so I am suspecting that as the problem. What is the procedure for reducing this free play?
Thanks




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Clooney

11-20-2003 08:47:43




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 Re: 1935 model B governor in reply to Dick C, 11-20-2003 06:48:55  
Dick, that rotational "free play" is normal as the governor fork isn't mechanically attached to the thrust bearing.. It just rides on the thrust surface..

~Your problem sounds more like the big leaf spring that moves the throttle linkage to wide open is either weak or broken or the linkage between the hand lever & governor spring is misadjusted, or the throttle lever [WOT] stop screw is not adjusted correctly..

~Remember that when the hand throttle lever is moved to wide open, the leaf spring in the throttle linkage wants to open the carb to wide open but the governor wants to keep it from doing that,,, so usually when the governor isn't working correctly the carb will go to wide open & not slow down..


~What you need to do.. [assuming the linkage is set correctly] is to either be able to move the hand throttle lever farther towards wide open, increase the rear rod length, ,, OR, increase the leaf spring pressure on the front linkage rod�

~One more thing� Make Sure the throttle linkage isn�t hitting or rubbing on anything & also Make Sure the cotter pin at the carb�s top throttle lever to linkage rod isn�t hitting & binding on the carb body [common problem]�..

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