John Deere 2040 Hydraulic squeal fixed or not?

[Zebrafive]

A couple of related questions. It looks like to me that both of the low pressure lines show a check valve in the diagram. I'm I correct in what I am seeing. Are both these lines supplying oil to the front hydraulic pump? or is the line coming from the top of the reservoir letting oil go back to the sump of the transmission pump?

I have no oil cooler.

Top of reservoir line is return of excess to sump