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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Re: MF 165 Hydraulic problems

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08-17-2013 15:58:57

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Hi David , thanks for your reply.
I tested the system with a round bale on pallet forks (about 300kg).
I did'nt want to spend much time on this job , so I raised the loader, put the right wheel on a concrete block and took the cover off without removing the foot plate.
I was having problems feeling around for the adjusting tube so I took some photo's.
They say a picture is better than a thousand words and these pictures say a lot.
Although I like things to be "in order" and origional, the tractor is mainly for the loader so it's not such a problem. The lift works and goes high enough to latch the pickup hitch.
It does however raise a few questions with respect to a relief valve, which assume is fitted.
The lift is not as strong as my MF155 which has the same back end so I was wondering if, as you said, some oil is leaking past the ram cylinder or the relief valve has a lower rating.
I have heard of this being done and with your experience I'm assume you have also seen such a modification. If so can you let me know if there are things I should check.

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DavidP, South Wales

08-18-2013 15:35:31

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 Re: MF 165 Hydraulic problems in reply to MikeNL, 08-17-2013 15:58:57  

Hi Mike,
You have mentioned that your tractors have Pressure Control fitted. The latest photos posted are of a tractor without PC. No PC body, pipe or diaphragm are shown. The two attached pages from the MF Hydraulic Adjustment manual show the components and the setting barrel 'A'.
I have deliberately printed the first picture upside down to make it easier to see the components. This was originally taken when the hyd cover was upside down. The position of the barrel when the quadrant lever is fully lowered in the PC quadrant will give initial maximum pressure. The second image shows final adjustment being made. On PC tractors this is the relief valve so the barrel should be adjusted to the correct pressure for the tractor. Non-PC tractors have a conventional relief valve screwed into the pump body.

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