Question Corrosion on hydraulic lines at the landing gear

[Matt]

So I have the Lippert 6 point level-up landing gear on my RV. Where the hydraulic lines attach to the landing gear, that nut is all corroded up on all of them. What's the best way to clean off the corrosion or what's the best product to use to clean these? Thanks in advance for any advice.

 

[Webz]

I would use a fine, stainless steel wire brush to remove the rust. A handy size looks like a toothbrush.
Or get brave and use a rotary version in a drill.
Then paint them to prevent future rust.
The permanent solution is having lines with stainless steel nuts.
I have no idea what would be the cost. But it may be worth checking local hydraulic hose makers, not an RV shop.
I believe some O'Reilly Auto parts stores make hoses as well as tractor repair shops.