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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF 35 3 pt hitch problem

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Alex Alexander

12-26-2006 10:32:57




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3 Pt Hitch goes down if I put in clutch, or have low RPM. If I slow the tractor down while going down the road, the load drops. It will only pick the load up or lower it at high rpm. The PTO turns OK, but I have not put a load on it....
Any ideas. I have the lift cover off and have looked at the cylinder, I think it is OK. I can pull the pump if someone knows what I should look for as the problem.....

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Kendall Mortenson

01-02-2007 14:05:23




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 Re: MF 35 3 pt hitch problem in reply to Alex Alexander, 12-26-2006 10:32:57  
Good post Alex,,,having the same trouble with my massey 50.Always starting with the simple stuff is the way to go,,,gonna start on mine by checking out those o-rings!



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Alex Alexander

12-31-2006 07:27:38




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 Re: MF 35 3 pt hitch problem in reply to Alex Alexander, 12-26-2006 10:32:57  
Sometimes you just get lucky. I put her back together again to "start from scratch" and now she works fine. The only thing I did was replace the o-ring for the lift pipe. In future, I will ask for help before I take something apart, but it is good to get it going again! Thanks for all the responses.



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DavidP, South Wales

12-27-2006 09:32:08




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 Re: MF 35 3 pt hitch problem in reply to Alex Alexander, 12-26-2006 10:32:57  
Hi,
Good advice from Jerry and Aaron. It would have been easier to diagnose the problem with the system working. When the linkage falls is there any sign of it trying to correct its position?
If you are loosing oil the Position Control should try to maintain a set position.
I agree that the problem seems to be related to the lift cylinder but it could also be broken rings on the stack pipe or a partially sticking control valve. Now that you have the cover off, the piston should be checked first. Is there any sign of the cylinder being loose in the cover? If so it is possible that your leak is coming from the O ring between the two.
Please let us know.

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Alex Alexander

12-29-2006 18:01:02




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 Re: MF 35 3 pt hitch problem in reply to DavidP, South Wales, 12-27-2006 09:32:08  
Thanks for the feedback guys, It will not be a problem for me to put it back together and start from scratch. The stack pipe o-ring did seem to be damaged, I noticed this when I took it out and could have caused the damage then. As to the cylinder, it looks scored, I don"t know how to judge how bad. If you drag your fingernail across the scoring, you can feel the ridges. Assembly looks good and tight to frame. I will replace the stack pipe o-ring and put her together and we can work from there.

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Jerry/MT

12-26-2006 21:26:39




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 Re: MF 35 3 pt hitch problem in reply to Alex Alexander, 12-26-2006 10:32:57  
You should have asked for help before removing the lift cover!
You most likely have the lift cylinder leaking but since you took the lift cover off you can't check it without reinstalling. I think new lift cylinder seals ar pretty cheap and should be an easy change since you all ready have the lift cover off. Examine the cylinder carefully to see if it's cracked and when you disasseble it look for worn seals and/or scoring.

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Aaron Ford

12-26-2006 12:09:08




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 Re: MF 35 3 pt hitch problem in reply to Alex Alexander, 12-26-2006 10:32:57  
Got to www dot photobucket dot com and do a search for aaronford1. On this page you will find the hydraulics section of a service manual scanned and uploaded. It is from a 65, but I believe they are the same in this regard. I think the first measure would be to check system pressure, if it is good, look into the lift cylinder, if not look into the pump or relief valve. Let me know if the link is dead or the pictures are not of adequate quality. I am thinking of doing a webpage, but am not sure of the legality. HTH

Let's go Mountaineers,

Aaron

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