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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Re: MF65 Diesel 3-Point Problem

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Masseynut(Australia)

01-08-2013 11:55:53
101.162.154.2



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Richard, By your description, I'd hazard a guess and say that the pump control valve has jammed in the fully raised position. It can be a fairly common problem with pumps that are well used, the oscillator is broken or there has been an ingress of foreign material to the suction side of the control valve. If you drain off approx. 10 litres of transmission oil, you can then remove the RHS centre housing side cover. It's the one with the trans. dipstick fitted to it. Now, take a look inside. You will see two levers coming down from the top cover. These rest against a roller on the control valve actuating lever. Work the "position" lever on the quadrant thru it's travel. The actuating lever should move back and forth. If it fails to move, the valve could be jammed. Try manually moving this roller and lever by hand, it may free up. If not, I would recommend removal of the pump complete, and rebuilding it, as you stated that it has been "weak" for some time. To remove the pump, remove the lift (hitch) cover, PTO shaft and the dowel plates from either side of the centre housing. Now remove the split pin from the drive or shear tube attached to the pinion, and slide it back over the shaft coming from the transmission. Place the PTO lever into ground speed, and lift the pump out thru the top of the centre housing, let us know your progress, Evan.

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RichardR

01-23-2013 13:50:46
98.20.43.133



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 Re: MF65 Diesel 3-Point Problem in reply to Masseynut(Australia), 01-08-2013 11:55:53  
Evan,
I drained the oil down, removed the inspection plate and checked the things that you suggested. The levers moved and the roller lever moved also. The only thing that I noticed was that the filter was loose from it's base and was flopped over sideways. I guess that I will pull the top off and try to remove the pump. I will most likely be in touch.



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RichardR

01-20-2013 17:50:00
75.88.2.214



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 Re: MF65 Diesel 3-Point Problem in reply to Masseynut(Australia), 01-08-2013 11:55:53  
Evan, thanks for the quick reply. My wife had surgery and I have had no time yet to do the checks. I have studied the IT manual a little on the pump removal in case that is necessary. Hopefully I will get to it in the next few days and will let you know how it progresses. I think that I will also service the ram piston while I have the top off. Can you tell me if the necessary parts are available here on the site?

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