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John Deere Tractors Discussion Forum
:

1950 John Deere A chattering noise

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mikewood869

05-10-2020 07:52:02




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Anyone know why a 1950 John Deere A make a chattering noise is when the clutch is disengaged? We replaced replaced the clutch discs (clutch facing) and when we first got the tractor driving again in Feb 2019 it was making a chattering noise. Everything on the crank seems good. We ended up having to re-wield the tab on the pulley and the chatting is still there. All the king nuts have been tightened the same, 11 full turns.




A video when the clutch is disengaged. https://youtu.be/UUuabVXHNBc

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buckeye al

05-12-2020 14:31:12




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 Re: 1950 John Deere A chattering noise in reply to mikewood869, 05-10-2020 07:52:02  
Are you sure you're not just hearing the rattle of the floating driver? With the clutch disengaged (especially at slow idle) the floating disc will rattle! Antique & early styled tractors did not have the floating drivers so they did not have this problem. As they came up on compression the floating driver would "flywheel" forward taking up all the slack in the splines between them & the fixed driver then when it fires the crank speeds up and IT charges ahead taking up the slack on the other side of the splines. The diesels (70-730) were real bad about this because of their higher compression.

The rattle diminishes as you increase engine speed and flat out goes away when you engage the clutch.

Maybe that helps?

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IAfarmguy

05-10-2020 13:31:50




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 Re: 1950 John Deere A chattering noise in reply to mikewood869, 05-10-2020 07:52:02  
When you engage the clutch to drive the tractor does the tractor move nice and easy? or does it jerk and grab suddenly? The clutch on my 520 had not been "right" for a long time. When torn apart the bearing in the pulley was bad. A new bearing (well packed with good grease) and it's as good as new. If you haven't pulled the whole pulley off and checked the bearing, that's where I'd suggest looking. My two cents.

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Mike(NEOhio)

05-10-2020 13:09:00




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 Re: 1950 John Deere A chattering noise in reply to mikewood869, 05-10-2020 07:52:02  
You didn't leave the pulley stopped very long but I didn't hear much of a change. Doesn't sound bad to me at all. Sorry, nothing to add.



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Dan in Ohio

05-10-2020 09:07:22




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 Re: 1950 John Deere A chattering noise in reply to mikewood869, 05-10-2020 07:52:02  
Most of the time a loose flywheel is heard on the clutch side and the noise changes or gets worse when the clutch is disengaged. I think you are looking in the wrong area and the things you have found in the clutch are incidental . Check the flywheel.



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MSD

05-10-2020 08:21:07




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 Re: 1950 John Deere A chattering noise in reply to mikewood869, 05-10-2020 07:52:02  
Sounds like the disks are dragging. Try throwing a little fine dirt in it when it's doing it and see if it quiets down. If it does they are dragging. Do they have an oil deposit on them? That'll make them sticky.



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rich duane

05-11-2020 06:25:19




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 Re: 1950 John Deere A chattering noise in reply to MSD, 05-10-2020 08:21:07  
I believe if you check the condition of the teeth on the clutch drive disc and the teeth on the floating disc you will have found the problem.



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