GR2120 hydraulic screach

[filipows]

After running it for a while, when I lift the mower deck I get a horrible screeching noise right behind the dashboard. No noise when cold (first starting)

On the way up no problem, but as it gets to the top it starts the screeching noise.
Don't know if others have this experience or if its a problem. It is annoying

 

[Russell King]

There is probably a relief valve that is being activated at maximum lift.

There may be some adjustment to limit the travel of the deck so it doesn’t overload the hydraulic system.

 

[filipows]

RK thanks for the suggestion. I knew there was some sort of up stop. Looked in the manual and the machine,
Manual says the bolt head in the pictures is intended to make contact with the fame. 2 things. 1, not close to frame 2, the bolt installed in the deck would, in my estimation, never come close. Don't know what to make of this geometry.

I took the mesh below the dash of thinking I might see a relief valve. Not seeing anything hydraulic behind below the dash. will continue to search.


Thank you

Dennis

There is probably a relief valve that is being activated at maximum lift.

There may be some adjustment to limit the travel of the deck so it doesn’t overload the hydraulic system.

 

[filipows]

I did some mowing today. I had the mesh screen in front of the operator platform removed. With the mesh removed I could better see feel what was going on.

As is usual no noise when I started. When I was finishing the screech was there when the deck topped out. With the mesh out of the way I could tell the noise came from the steering valve. Valve felt warm/hot. I don't know what in the valve would cause this when it warmed up.

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Thanks