Weak hyd

this spring I was shuffling equipment around in my shed when my 680 would barely lift the pickup header and was tough to steered after sitting all winter. I parked it to side and the dealer came out and replaced the valve that tells the hyd pump How much pressure to build and parked it in shed while I was seeding, no problem. I go to move it today and same thing happening! I know the dealer will look after me and all. Just wondering if anyone else ran across similar issues or if there is more too it?

TIA

Weak hyd