twvette wrote:
Picking up new 5th wheel with the Level Up system. One of my front legs has its hydraulic lines (two) going above one of my battery compartment and trying to squeeze in an oversized 6V battery into the compartment and they will likely be in the way to "get it in the door" but ok clearance after that. If I need to disconnect these lines (looks like AN4 fittings) temporarily what would I likely need to do to get them running again. I am a bit familiar with hydraulic systems and will certainly have the trailer supported by the truck/jacks up. Just try to minimize fluid loss, replace fluid, and let them self purge or more involved? I suspect there is still some pressure in at least one of the lines since they auto retract also.
To relieve pressure on the system, disconnect the PUMP leads, but leave the valve leads hot. Actuate all the valves, in both directions, to relieve pressure. If the landing legs want to gravity drop, crib them up.
This is one of the things I don't like about hydraulic systems. I was raised to relieve pressure on the hydros whenever the implement was not being used. When moving implements, we always had collars for the cylinders or support straps/cables/chains to keep one from extending during transport. THEY took the stress, not the cylinder seals, hoses, fittings and valves. Of course, this =was= on a 3k psi system... :-)
Lyle
