noise into the hydraulic pump

[peco]

Hello, it'is my first post,I am from Belgium and my English it is not good.
I have a problem with my iseki tractor (landhope 165) .
Just after the winter I restarted the engine and each time that I us the 3 rd hand I can hear a noise coming from the pump, to stop the noise I have to ajust by turning a bit down the level command.
I don't understand where the problem comes from and why it appeared after I stored it a few months.
Can you help me to slove the problem? I hope that the pump has no damage
Thanks

PECO

 

[IH3444]

Could be just cold fluid. When was the last time you changed it? and the filter?

 

[peco]

the noise appear also when the engine is hot, but there is a long time that the filter and the oil have change.

 

[Soundguy]

Dirty suctgion filters can starve the pump and cause it to cavitate. that will make noise.. and eventually kill the pump.

periodic oil and filter changes are needed.

soundguy