|
Hi there... well, to me it sounds like the control valve is stuck open. The Ferguson / Massey Ferguson hydraulic pumps controls the pumping on the suction side. And if the control valve is stuck in the open position, it will let in oil and pump as if you had the lever in the raising position. Open the right inspection cover. Put the parking brakes on first... as we all want to hear the result when you are done, and if the tractor rolls you might get stuck too and not be able to use internet for a while :-) If you sit on the floor, between the right rear wheel and the right inspection cover (the cover with the dipstick) and use a lamp you should see 2 arms coming down from above, if you put your hand in you can feel them too. At some point down there you will feel a roller and the arms that goes down to the pump. If the roller is missing the control valve will get stuck, but since I have misplaced my shopmanual I am not able to remember if the spring puts it in lift or lowering position.
When you move the lever for raising or lowering the implement (position control) you will see in what direction one of the pins will move. From this you should be able to determine in what direction the control valve is supposed to go. Once you have found out, you will see if the valve is stuck. If you can move the arm with the roller back and forth without any spring tension in one direction the valve is stuck, because the spring acts on the valve, and not on the arm as far as I remember. Sorry I have misplaced my shop manual, cause if I had it here it would be much easier for me to tell you exactly how it is. If the valve is stuck, you may be lucky and get it loose by moving the arm back and forth. It can be some forreign materials that came in and made the trouble.
If you can not get the valve loose you need to get the pump out, and if the valve is stubborn you may need to replace it. Luckily for all of us MF lovers the control valve is not a very expensive part, but a lot of work to get the pump out. Let us hear what you find out so we can direct you further on. Be aware,,, if you for some reason should get a heavy attack of working desire and want to lift the hydraulic cover off, remember to remove the roller on the control valve arm I earlier talked about. If not something will be damaged. And remember, once you take it out, there is a big chance that you first loose the bolt and locking device down in the oil... and when you feel that thay are about to fall down, you will probably try so hard not to loose them that the roller will fall down in the oil too... :-) I am just mentioning it because this was exactly what happened to me... I was not prepared for the hurry I would be in when I felt the bolt just slipped out of my fingers. Good luck.
Bill
| 
