Instructions say connect a hydraulic cylinder and with hose end up extend and retreact cylinder.
Operator manuals are free download from JD at https://techpubs.deere.com/en-US/Search/Equipment
Locate the bleed cap along the hydraulic lines. And open it slightly
Then open the fluid reservoir and Pump the fluid through, Close bleed nipple and then apply lid to reservoir and then bleed is complete.
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What model tractor are you working on?What is not working now that you have changed the fluids?The hydraulics will bleed themselves as the functions are cycled,if they won,t then you may need a new coupler in the rear or the tractor,a pressure guage will confirm this.
Hydraulic
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