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.