NH 2120 Hydraulic problems

[woodman2120]

I am having problems with the hydraulics on my NH 2120 tractor.
I use the tractor for my firewood business; so I have a bucket and Farmi Winch on the tractor.
Recently, I have been experiencing problems when the winch is lifted. When the winch is fully lifted the tractor still labors as thought it is still lifting the winch.
I have changed the filter, which did not fix the problem. Someone suggested the relief valve in the pump.
What I want to know is there a way to replace the valve without buying a new pump? I have been searching online for a diagram of the pump to get a part number for the valve and haven't found anything that helps.
I am also wondering if there is a repair kit for the pump?

 

[kirkawilson]

Drop the winch slightly from full lift and see if the pump unloads. If so, you probably have a lift control valve problem, maybe the unload valve. Some settings adjustments might help. I just operate my 3ph lift slightly below full lift to avoid the problem.

 

[Leejohn]

Look and see if you have a feedback linkage and if you do just adjust it. I can't help with a picture for the NH tractor, maybe someone with a NH can post one for you.

 

[woodman2120]

Thanks for the help. Going to work with it at slightly below full lift.