LCI Level Up hydraulic jack leaking - what to do next?

How old is the RV? Mine developed 3 leaks over the years, 2 were hyd lines that I tightened and it fixed the leaks the other was the small dia piston on the upper jack. This was on a HWH system the leak stopped by itself after a period of time. If you wipe the jacks down good you should be able to see where the leak is coming from after you cycle it a few times especially if is creating a pool of fluid on the foot of the jack.