texasvinny
New User
Hi All! I purchased a JD 4020 this past year and am in the process of putting it to more active use. It came with an old 'Farmhand F258'
loader. The loader hydraulic control valve appears to be 'two spool' and is not working as effectively as it may have way back when. In
searching for a new loader hydraulic controller to replace it with, I'm faced with options such as 'hydraulic pressure', 'hydraulic flow
rate' & 'hydraulic type'. John Deere says that the 4020's internal hydraulic characteristics are: hydraulic pressure = 2,250 psi, total hydraulic flow = 18 gpm and hydraulic type =
'Closed'.
My question is: Does the new, replacement loader hydraulic control valve characteristics need to be equal to or higher than 2,250 psi & 18
gpm and does this new control valve also need to be 'Closed' so that it matches the characteristics of the JD 4020?
Thanks in advance for any and all constructive guidance!
loader. The loader hydraulic control valve appears to be 'two spool' and is not working as effectively as it may have way back when. In
searching for a new loader hydraulic controller to replace it with, I'm faced with options such as 'hydraulic pressure', 'hydraulic flow
rate' & 'hydraulic type'. John Deere says that the 4020's internal hydraulic characteristics are: hydraulic pressure = 2,250 psi, total hydraulic flow = 18 gpm and hydraulic type =
'Closed'.
My question is: Does the new, replacement loader hydraulic control valve characteristics need to be equal to or higher than 2,250 psi & 18
gpm and does this new control valve also need to be 'Closed' so that it matches the characteristics of the JD 4020?
Thanks in advance for any and all constructive guidance!