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'50 B Throttle Control Rod Adjustment


 
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Ayr Time
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PostPosted: Fri Jan 18, 2019 12:18 pm    Post subject: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

What is the proper adjustment technique for setting the throttle rod length between the throttle control arm (base of the steering column) and the spring on the governor?
This is rod 1 of 2.

I have swapped out the steering column and the max throttle setting screw and the length of the throttle rod are way out of adjustment.
I do have a digital tachometer for setting max engine rpm.

There have been numerous detailed posts/threads on how to set the governor to carburetor control rod as outlined in the JD B Service Manual page 110-10-3.
I have made this adjustment and now I need guidance on setting that first rod.

I'm open to suggestions as to setting the max engine rpm as well.

I monitor this forum daily and thank so many for their helpful comments as I restore my late uncles 1950 JD B.
Richard
 
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Pappy
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PostPosted: Fri Jan 18, 2019 2:43 pm    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

The only way I know to do it is to move the throttle lever all the way forward. Un-hook the rod that is connected to the end, the rod that goes to the governor spring. Start the engine and pull the adjustable rod back until your engine speed reaches the prescribed RPM.
Probably about 1300 or so, then adjust the rod to fit the lever. Fine tuning can be done with the stop screw.

I could say to run the engine wide open throttle and check the RPM and then adjust the rod, but without knowing what has been changed, serious over speeding the engine could occur.
 
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Mike(NEOhio)
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PostPosted: Fri Jan 18, 2019 4:58 pm    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

Do you mean this one? I've had the same trouble on my A. I think with the hand lever at idle the length of that rod should be set so that it allows the idle screw to just contact the throttle stop spring without forcing it to bend. Then use the bolt on the steering post to set the high idle speed.

 
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machineryman1945
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PostPosted: Sun Jan 20, 2019 4:15 am    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

CVPost-Ayr Time wrote:
(quoted from post at 13:18:21 01/18/19) What is the proper adjustment technique for setting the throttle rod length between the throttle control arm (base of the steering column) and the spring on the governor?
This is rod 1 of 2.

I have swapped out the steering column and the max throttle setting screw and the length of the throttle rod are way out of adjustment.
I do have a digital tachometer for setting max engine rpm.

There have been numerous detailed posts/threads on how to set the governor to carburetor control rod as outlined in the JD B Service Manual page 110-10-3.
I have made this adjustment and now I need guidance on setting that first rod.

I'm open to suggestions as to setting the max engine rpm as well.

I monitor this forum daily and thank so many for their helpful comments as I restore my late uncles 1950 JD B.
Richard


No need to be concerned at the rear adjustment....front adjustment is 1/2 hole short wide open.
 
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hojon64
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PostPosted: Sun Jan 20, 2019 8:01 am    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

According to my book with the throttle all the way forward adjust the rod so the spring barely touches the arm. It says you should be able to pull a piece of paper out without ripping it when adjusted properly. I do this first then the wide open adjustment of 1/2 hole short and it works well. use this on A/B and 50/60/70 etc.
 
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hojon64
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PostPosted: Sun Jan 20, 2019 8:02 am    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

Sorry - Throttle all the way BACK so spring is forward....
 
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PostPosted: Tue Jan 22, 2019 6:01 pm    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

Thanks for the comments and suggestions fellas. Sorry for being tardy in replying. Dealing with cold weather and snow here in E Ontario. -30C or -22F here this morning. Got 10-12" blowing snow Sat/Sun.
Yes Mike, Im referring to the lower rod in your picture and am referring to it as the first rod.
Pappy, yes I'll be careful not to create an over speed situation, thanks.
Hojon, What is the book that you refer to? JD B Service Manual? If so on what page please!
Ok so... throttle BACK and adjust the rod so it barely touches the arm. Just tight enough that a piece of paper can be pulled out from between the arm and the spring. Others have suggested 1/8" space?
As I've indicated previously, I'm familiar with adjusting the second rod from the governor spring to the carburetor. (1/2 hole short at full throttle).

Once we get some warmer weather, I'll have at it again.
Thanks to all,
Richard
 
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hojon64
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PostPosted: Fri Jan 25, 2019 2:51 pm    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

I think it was in the Deere General Service Manual (SM2000) if I remember right. I adjusted mine so it's just touching and then adjusted wide open for 1/2 hole short. Once you set Idle and open throttle with it running (tach it) I check it again. They're not with me right now so I can't say for sure that was the book but I remember reading it when I had mine all tore down. If your spring is bent I'd replace it. Some guys jack it so hard against the gov that they bend it. It just needs to barely touch it so it can do its job. Going up steep hills my tractors pop good and hold their own.

I remember buying my books from Davenport Tractors as they seemed to have a really good selection and at a good price. I buy repair manuals for all my tractors when I buy them so I have it at my disposal and can look up the answers. There aren't many guys around that have worked on these two cylinders anymore so having one is nice.
 
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PostPosted: Fri Jan 25, 2019 7:04 pm    Post subject: Re: '50 B Throttle Control Rod Adjustment Reply to specific post Reply with quote

Thanks honjon64. I'm not aware of the JD Gen Serv. Man. Assumed when I purchased the '50 B Service Manual I was good to go. Once/when we get a mild day or two I'll, readjust the setup as you describe and give it a try. Hi of about 25F today and dropping to 0F overnight. Crazy roller coasters temps here.
Headed for annual Maple Producer update Sat. Own't be long before we are tapping (2000 taps) and so much prep. to do! Richard
 
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