[JRTJH]

Don't forget the "popping" from hydraulic self leveling systems. The "fix" for that was to add "anti-stiction fluid" (which I believe is, for the most part, just a good grade of "quality hydraulic fluid") to the system.

I look at the hydraulics on my tractor, it's got three filters on the same hydraulic fluid, my truck has a filter on the hydraulics in the transmission, I look at the RV systems and there's no filter, just the same fluid being used "unconditioned" for years and years. It's remarkable that we don't have more "O-ring bits", metal shavings and more system failures than we do.

I don't have a hydraulic system on my trailer, everything is electric, but if I did, I'd be finding a means to add a filter to the system, probably on the input of the pump.