On mine, the connections mounted on the loader of the machine, were OK, but the hose end fittings were only hand tight.
When I went to tighten them up, I made the mistake of raising the loader to get the arm out of the way. Then I realized that I still couldn't get a good purchase on the hose end to tighten them the way I wanted, so I just disconnected them and tightened them up.
When I went to re-install the hoses, I found that one would not go on. Long story short, the system had such a hydraulic load on the hoses because the bucket was up that one hose would not reconnect. I ended up putting upward pressure on the bucket with a floor jack to release the pressure (moved about an inch). Then the hose went right on.