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John Deere Tractors Discussion Forum
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1941 A John Deere Govoner Problem

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Rob Hartman

01-01-2007 09:51:40




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I have a 1941 A John Deere with a Power Block. I have been completley through this tractor top to bottom. I have replaced everything except the bronze collar in the govoner and the arm shaft. The govoner is lazy. It doesn't want to pick up under a small load but if you stand on the brakes or put it on the dyno it will. It idles right down but it wants to overrev a bit. I had 3-14's behind it in heavy ground and it just idles down and pulls but the govoner does not respond. It will pull over 60hp on the dyno. I've done all the tricks with the linkage, if you rev it manually and hang on to the throttle linkage the govoner pushes forward like it's sapose to. I still think it's a linkage problem but maybe somebody else's imput would be good before I lose all my hair. I have alot of money in this tractor and I'm ready to paint it but I need to get this problem fixed first. I have other tractors to work on but need to get this one completed first.

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CalJim

01-01-2007 21:38:30




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 Re: 1941 A John Deere Govoner Problem in reply to Rob Hartman, 01-01-2007 09:51:40  
Had governer problems on a B like that....
Turns out there was a groove worn into the
bronze shaft and the bearing was hanging up
on it. CalJim



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Rob Hartman

01-01-2007 21:45:13




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 Re: 1941 A John Deere Govoner Problem in reply to CalJim, 01-01-2007 21:38:30  
Mine is rough and I wondered that. The part is $100 at Deere and I want to be sure that is it before I go spending. The thrust bearings don't hang up when you have the govoner out moving them by hand but that doesn't mean they don't when its running. I'm going to see if I can find a good used one and try it before I buy a new one.



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Mike Aylward

01-01-2007 18:33:18




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 Re: 1941 A John Deere Govoner Problem in reply to Rob Hartman, 01-01-2007 09:51:40  
Rob, is it possible that someone before you has installed two governor springs instead of one? It almost sounds like the classic symptoms of this. Too many people succumb to this thinking it will help when it actually hurts the performance of the tractor. Just something to check. Mike



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F-I-T

01-01-2007 15:33:57




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 Re: 1941 A John Deere Govoner Problem in reply to Rob Hartman, 01-01-2007 09:51:40  
Are you sure that the governor is "lazy"? If I am reading your description correctly, it is governing it too much, i.e. keeping it pulled down instead of relaxing and letting the throttle lever spring ask for more fuel. Remember, it's a governor, not an "opener".

Have you done the benign static test of throttle wide open, carburetor butterfly wide open, linkage rod should be 1/2 hole short of connecting. That 1/2 hole is the preload that the linkage needs.

Did you install the correct weights? Too heavy would keep it pulled down, right?

Frank

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Rob Hartman

01-01-2007 21:32:25




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 Re: 1941 A John Deere Govoner Problem in reply to F-I-T, 01-01-2007 15:33:57  
I've done the 1/2 a hole off thing, I've tried one spring and 2 springs and have the same results. I think I'm going to change the whole housing and see what that does. Maybe my buddy is right the govoner arm shaft is hanging up. Thanks guys



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DSK

01-01-2007 12:20:47




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 Re: 1941 A John Deere Govoner Problem in reply to Rob Hartman, 01-01-2007 09:51:40  
As long as you're checking out the governor, check the fit of the right hand bearing in the governor case bore. There is a case reclaiming procedure outlined in the JD as well as the I&T manual. Most of the A's I've seen of this age have a lot of wear in this area. The symtoms you're describing however indicate a binding problem. Aloose right hand bearing will allow the RPM to drift upward, and if you're running a mag, it will throw off the timing enough to make the tractor idle poorly, but it will still run good under load.

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Mike M

01-01-2007 11:32:59




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 Re: 1941 A John Deere Govoner Problem in reply to Rob Hartman, 01-01-2007 09:51:40  
A couple of things come to mind. If the throttle shaft bushings were replaced and ended up a little tight it could act like this.I a 70 carb. that seemed free but wasn't free enough. Too loose is actually better than too tight. So can binding or rubbing linkage or the little cotter pin in the linkage at the carb. make sure it doesn't rub the casting. Next things you mentioned about that bronze sleeve if the fork isn't on straight or the shaft not pulled into the right position the fork can rub on that bronze sleeve. I have also seen I think on that model tractor the governor weights put in the wrong spot. They push on the bottom of the sleeve that should have a metal flanged portion and not directly on to the thrust bearing. I think I have the right model ? since you rebuilt the gov. it should be fresher in your mind if it was built like this or not.

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Rob Hartman

01-01-2007 11:57:09




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 Re: 1941 A John Deere Govoner Problem in reply to Mike M, 01-01-2007 11:32:59  
The carb has been rebuilt but the throttle shaft doesn't seen to tight. I don't even have a cotter pin in the carb end of the rod right now so it's not binding there or anywhere else for that matter. I put new weights and pins in it because the other ones were wore so bad. It still acts like a linkage problem. I've had that govoner out of the housing 5 times and still can't come up with anything.

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luckydog

01-01-2007 10:47:32




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 Re: 1941 A John Deere Govoner Problem in reply to Rob Hartman, 01-01-2007 09:51:40  
Rob- I gave you my thought on tractor talk. Luckydog



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