massey ferguson 30E 3 point

[steve2323]

I have a new to me massy furgeson 30E. It is a loader/scraper model with the gannon back. The issue I have is with the 3 point lift for the gannon box not wanting to lift up with the lever. when I raise the lever up, the arms of the 3 point move ever so slightly, but will not lift the box. However if I push on either the forward or reverse foot pedal, while the 3 point control is in the up position, then the box will go right up. Additionally, if i raise the motor speed with the throttle lever by the steering wheel, the gannon box will not go up. it only goes up if i press the forward or reverse foot pedals.

I drained out all the fluid and replaced. I also removed the oil screen inside the differential, from the bottom and cleaned it, it was not to dirty. I have the operators manual and service manual for it, came with the tractor, it told me how to drain the fluid and clean the oil screen. I'm not to experienced with equipment, but fairly mechanical. Is there a filter i am missing somewhere? or an issue with a pump? or any other thoughts would be very appreciated! thank you.

 

[3Lfarms]

I’m no expert, but it sounds like someone has monkeyed with the hydraulic plumbing. Tractor data says it’s an open center system. It sure sounds like the three point is now plumbed into what should be the return to tank from the drive system.
If that is the case, the tank return may not be able to handle the pressure the three point is going to need to move the arms with a blade on it.
It’s sounds strange, but I think all it would take is for someone to have swapped two lines around to create this problem.
I think you are going to need to post detailed pictures of the hydraulic plumbing so the experts here can verify the correct ports were used.
It’s possible a valve was replaced and someone didn’t pay attention to the port markings.