I have a JD 2520 with a 200 loader, 3 years old. The buchet while dumping will reverse direction quite often, seems to be worse when hot. I have had it back to the dealer 3 time for repair and they have not found the problem. they have changed parts but not the right one. Has anyone seen this before and if so what was the fix?
JD 200 loader auto reversing bucket
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J_J
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Does the bucket try to come back up after pushing the lever down and holding it down.
If there is any air in the cyl, and you push on the lever and let go, the air that was compressed will try and push back, if there is not a heavy load.
Logically, if the cyl is full of fluid and no air, then what you do at the push end will reflect on the piston, with no delay. The valve in neutral will lock the bucket in any position if there is no leaks in the seals or valve spools.
If a bucket should move with the conditions set above, then you would have to look at mechanical linkage, but with a load, the load will continually try to pull the load down, and I can see no way the bucket would tilt up.
Perhaps if you have regen, You would be putting more fluid in the base end than coming out the rod end. That 4 GPM going to the base cyl now becomes about 25 GPM's, with a decrease in pressure and force.
Below, they say regen will correct a floppy bucket.
Problem - Loader bucket moves freely after
dumping load
Cause - Tilt cylinder cavitation has occurred. Bubbles formed.
Correction - Use of regen function (if equipped)
while dumping load will eliminate
problem.
If there is any air in the cyl, and you push on the lever and let go, the air that was compressed will try and push back, if there is not a heavy load.
Logically, if the cyl is full of fluid and no air, then what you do at the push end will reflect on the piston, with no delay. The valve in neutral will lock the bucket in any position if there is no leaks in the seals or valve spools.
If a bucket should move with the conditions set above, then you would have to look at mechanical linkage, but with a load, the load will continually try to pull the load down, and I can see no way the bucket would tilt up.
Perhaps if you have regen, You would be putting more fluid in the base end than coming out the rod end. That 4 GPM going to the base cyl now becomes about 25 GPM's, with a decrease in pressure and force.
Below, they say regen will correct a floppy bucket.
Problem - Loader bucket moves freely after
dumping load
Cause - Tilt cylinder cavitation has occurred. Bubbles formed.
Correction - Use of regen function (if equipped)
while dumping load will eliminate
problem.
Last edited:
Yes, the bucket does try to come back up while holding the lever down. It usualy happens at or near the end of its travel. I am also experencing the floppy bucket condition as discribed. I am not sure about the regen Funtion. I don't see anything about it in the manual.
J_J
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If you hold the joystick to the far right, does the bucket dump any faster?
There should be a soft detent.
There should be a soft detent.
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No, It seems to be the same speed.
I did find the regen funtion the tractor manual (I was looking in the loader manual) I am not sure what the regen does. The manual talks about flipping a L shaped bracket on the control valve and this will lock out the regen funtion. I am guesing the regen has something to do with how far you can move the lever to the right?
I did find the regen funtion the tractor manual (I was looking in the loader manual) I am not sure what the regen does. The manual talks about flipping a L shaped bracket on the control valve and this will lock out the regen funtion. I am guesing the regen has something to do with how far you can move the lever to the right?
OK After going out and studing a little more I find that the bucket will dump a little faster with the lever all the way to the right. I also find that the reversng is taking place in the area between slow and fast dump. Dont know what this means, maybe a worn valve???
J_J
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Regen is a function to increase the speed of operation. It allows the fluid from the rod end to combine with the normal flow to increase total flow, but less force. The movement of the joystick lever to the extreme right activates the regen function. It is normally used for a fast dump. It makes the cyl work about 4 times faster.
The regen mode might not raise the front of the tractor when using the curl down, but the normal curl should be able to raise the front end off the ground.
The regen mode might not raise the front of the tractor when using the curl down, but the normal curl should be able to raise the front end off the ground.
