jlg 40f bertea valve issues

[landon baker]

can anyone explain to me how this valve works? I have one that is stuck. I’ve taking it apart to clean but still isn’t going back to neutral position. I feel like I’d have a better chance of fixing it if I understood how the valve works.

 

[excavator]

There is another 40F post on here with 77 pages of information that may have what you are looking for, otherwise there a number of guys who contribute regularly that will be able to help you. Search "the JLG 40F boom lift dilemma"