new "wineing" sound when load placed on PTO

[SailormanEd]

I have a large Kelley backhoe attachment on my L2850 and yesterday I noticed a new vibration and later a new sound. Engine oil and coolant are fine. Today I started it up to remove the backhoe and when I put a load on the PTO powered Prince pump, there is a load wineing sound from the transmission and no hydraulic pressure from the pump. I used a big floor jack to get it off and the sound is gone (no load on the PTO) This tractor has live PTO and a double clutch. I am thinking the live PTO clutch disk and / or pressure plate is damaged. Anyone run into this or have any other thoughts before I tear everything off and split the center? The rest of the tractor seems to operate normally. 2319 hours on it. Ed

 

[KennyV]

Do you have any thing else you can load the pto with... just to confirm that it Is the tractor and Not the pump that is causing the problem?