MF 175 lift arm position, Engine Off

21hunter

Member
I have a question about what is normal for the 3 point lift on my 175. I was going through some hydraulic checks and adjustments. I noticed that when the engine is stopped the 3 point lift will allow the attachment to lower to the ground. With the response control cover removed I notice that fluid sprays out of the small pin hole in the control diaphragm. That seems to be the point where the hydraulic pressure is relieving from. I don't notice any other fluid leaking anywhere else. The main pump and control valve are new. The lift cylinder is new too and has a Teflon piston with no leakage there. Is it normal for these tractors to not hold the load with the engine off? If not then any suggestions?
Thanks
 
Yes, it's normal for the three point to settle down with the engine off. The control valve is not a positive one way check valve to trap the cylinder oil.
 
Way back at MF factory training, the engineers said just tell the customers that it is a safety thing,they are supos to leak down.
 
My old Ferguson TO35 has never helt the load up after the motor was turned off, as was stated I thought it was a safety related thing to take pressure off the hyd lift system,
Also keep it from falling on some one if the lever were accidental moved when the motor was off,

My old AC D14 would hold the load up for months I guess, it never When down until you pushed the lever,

If you want a load to stay at a fixed height on the TO35 you install the stay bars, then lock out the lift lever, so it's not accidentally raised up,

The stay bar system will hold the lift at the same level, I use it for my seeder,
 
Thank you everyone for the responses. The safety issue makes sense. I did look and in addition to the oil shooting out the tiny hole on the pressure side of the control diaphragm housing, there is also a little oil coming out the pressure control valve exhaust port. The implement settles fairly slowly. I was jus used to other tractors that don't do this.
Dave
 
If you park it with the arms raised with nothing hooked to them, and if you can actually watch them drop on their own its time for new lift cylinder seal(s).
 

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