1950 John Deere A chattering noise

mikewood869

Well-known Member
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.

mvphoto54593.jpg


mvphoto54594.jpg


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

I know that this post is old but the clutch would still chatter at any engine speed when the clutch would be disengaged. We pulled the disk sliding drive (F195R) off of the other A and put on this one and would still chatter. We pulled the belt pullet off of the other A and we're going to try swapping them. Which would be the bearing; 13 or 14? The tractor seems to engage good, but it doesn't seem to a good snap? The noise is louder in person.
Link to the pulley, the pulley at the bottom.
https://partscatalog.deere.com/jdrc/sidebyside/equipment/75641/referrer/navigation/pgId/99397
 
We ended up swapping the belt pulley and it seem quieter, but still chatters, the bearing seems all right. Could it be the bushing or something else? Deere wanted $140 for the bearing.
This is right after we put the belt pulley back on and adjusted it. Part 1.
https://www.youtube.com/watch?v=S4jE4_0Wbgo

Driving it around in the field, part 2.
https://www.youtube.com/watch?v=NJUR2167D0Q

Shifting into a different gear, part 3.
https://www.youtube.com/watch?v=R6a2KHid4M0
We also got the tire off.

mvphoto60391.jpg
 
Had the same thing on my A. The springs that push the disks apart when the clutch is released were too short/weak, letting the disks drag. New ones eliminated the chattering.
 
(quoted from post at 11:53:27 08/18/20) Had the same thing on my A. The springs that push the disks apart when the clutch is released were too short/weak, letting the disks drag. New ones eliminated the chattering.
Theyre newer than what was in there before. They probably have less than 24 hours of run time.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top