Yeah, man, I feel you on that one. Hydraulic line issues can be super frustrating, especially when they keep coming back. I've seen a few guys deal with similar problems on smaller excavators like the PC60-7, and sometimes it's not just the hose quality; it can be things like rubbing points, loose clamps, too much vibration, or even pressure spikes if the relief valve isn't set right. Also, worth checking if the lines are routed properly or if they're getting pinched during boom or arm movement. Sometimes, a simple re-routing or adding extra protection like hose sleeves or better brackets can save you a lot of headaches.
You're doing the right thing, asking around and learning from others' experiences. These machines teach us the hard way sometimes.
