Hydraulic questions

In trying to unwind the mess in my front compartment that houses the batteries and the hydraulic equip I need to disconnect some hydraulic lines so I can re route them to untangle the mess and protect the lines that are going through the wall.

DRV must have hired the third grade class in Elkhart the day my RV was assembled. I have never seen such shoddy work in my life.

There are two 2" holes through the wall in my battery compartment side by side and they brought all of the elec and hyd lines through one opening. They are so tight I can't even get any split tubing around them to keep the thin medal in the wall from rubbing a hole in them and there is a gas pipe riser 2" in front of the opening they chose to use.

I have found this throughout the RV on gas lines, brake lines, hyd. lines, elec lines you name it they are just run through the thin metal walls in most cases unprotected and laying on the sharp edges.

Now rant over my questions are 1) do the hydraulic lines have a metal lining? and 2)is there pressure on the lines when the jacks are down and 3) do you have to bleed this system like a brake system if you take a line loose?

Thanks in advance for your help.

Doug

By the way this is a Lippert level up system.