Relief valves "scream" when they open as they drop pressure from max to reservior pressure. You say the pump knocks when you get to max lift. Small leakages usually result in the three point control responding with repetitive "lifts" as the cylinder leaks down and the feedback causes the control valve to port flow back to the lift cylider to try to maintain position. Lack of position control can be caused by excessive leakage in the lift cylinder. Slow drop is more normal without any weight on the arms.ĭoes your hydraulic system have a filter and if it does, have you replaced it when you replaced the fluid? if th fliter is on the inlet side of the pump then it can restrict the flow if clogged and reduce the response.
3 POINT HITCH DRAFT CONTROL MASSEY FERGUSON 265 MANUALS
I just received my service manuals and am thinking I need to adjust the position of the position control.ĭoes anyone have anything to add or recommend? Am I going in the right direction or not? I also refilled with fresh permatran fluid despite it outrageous cost. I went ahead a drained and cleaned the hydraulic sump and screen. Also I have to have the response control in the most positive flow because the lift arms are so slow to lower the lift arms unless they are loaded.I did notice this issue over winter.
I am using the position lever with the draft control in the extreme up position as instructed in the operators manual. It will creep up to the point of being able to hear the activaton of the pressure relief valves by it's knocking. It is as if the implement is always creeping up or down. What happens is the tractor will not hold the bush hog in position as I'm using it.
I did not put a model in the title because so many of these tractors are so similar I figured any advice would be helpful. I seem to be having some issues with a Massey Ferguson 231s tractor I bought last fall.