MF 60 hydraulic pump question

Does anybody have enough experience with the Massey Ferguson hydraulic system know if it's supposed to squeal when a function is bottomed out? Supposedly it's a load sensing axial piston pump, but I haven't found much more info than that.

I'm looking at this for a friend to purchase and that was the only thing that stuck out at me as maybe not right.

MF 60 hydraulic pump question