I have a 303.5d cr that the hydraulic pressure is fine. However when I track it or move the boom left it drops to 100psi. Any other operation it remains within perimeters. I just changed the coupler.
Good day Eric Is that a Cat?
Yes it is
Good day Eric From the thread it sounds as if the issue arrived with the quick coupler change if so try to plug the coupler lines to establish if that is responsible. Kind regards Uffex