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That model is a little newer than I am familiar with but I suspect the pto is similar to the older ones.
For a test, engage the pto and let the tractor idle. Then take a stout board and and use it as a lever against the ground or 3 point hitch and see if you can easily stop the pto from turning.
Those PTOs are engaged by means of a hydraulically operated clutch. There is a pto brake on them that should stop it from turning when you shut it off.
But that brake is just a flimsy little thing and NOT designed to stop a heavy bush hog from continuing to spin after you disengage the pto.
It wears out that brake quickly.
If you can stop it easily with your board then it is the little brake is worn out and the friction of the oil in the hydraulic pto clutch is causing it to turn. I had a 4000 that I could grab the pto with my BARE HAND and stop it.
If you can NOT easily stop it with your board it likely has been abused and has warped discs in the hyd clutch.
To fix either issue requires removing the rear end of the tractor.
So, depending on what your test shows:
If you can easily stop it I would just live with it.
If you can not stop it then I suggest you repair the pto clutch.
Photo shows the pto brake on a 4000.
Tha actual brake pad is that little bronze colored square.
Please let us know the results of your test.
For a test, engage the pto and let the tractor idle. Then take a stout board and and use it as a lever against the ground or 3 point hitch and see if you can easily stop the pto from turning.
Those PTOs are engaged by means of a hydraulically operated clutch. There is a pto brake on them that should stop it from turning when you shut it off.
But that brake is just a flimsy little thing and NOT designed to stop a heavy bush hog from continuing to spin after you disengage the pto.
It wears out that brake quickly.
If you can stop it easily with your board then it is the little brake is worn out and the friction of the oil in the hydraulic pto clutch is causing it to turn. I had a 4000 that I could grab the pto with my BARE HAND and stop it.
If you can NOT easily stop it with your board it likely has been abused and has warped discs in the hyd clutch.
To fix either issue requires removing the rear end of the tractor.
So, depending on what your test shows:
If you can easily stop it I would just live with it.
If you can not stop it then I suggest you repair the pto clutch.
Photo shows the pto brake on a 4000.
Tha actual brake pad is that little bronze colored square.
Please let us know the results of your test.