Our Seismic Leveling Solution
We have a 2019 Seismic 4113. We did our research before we bought and knew leveling was going to be an issue. It was one of the trade offs for the whisper quiet air, raised kitchen, walk-in shower, side patio, electric ramp door, queen bed with two full night stands, etc, etc. And the electric jacks were a nice idea as coming from the constriction industry having dealt with hydraulics and knowing they can bleed off in RV's and chasing leaks can be tedious we were willing to R&D a process that would work. Others were doing it why not us. And I have made a living being a solutions guy.
After reading many non-helpful posts and many failed processes, this is what has been working without fail for us.
Getting our unit's rear bumper close to level (within a couple of inches) with under tire boards or store bought roll-on risers, if necessary, is paramount. If the rear jack experiences too much load pressure, ours faults out every time without fail. Ive tried lowering the front way down, placing blocks under the low side rear jack and raising the front back up to lift the low rear side. Doesn't work for us as there is already too much "load" pressure on the low rear jack and it faults out every time without fail. Doesn't matter if we are on shore power, generator or batteries.
What does work without fail is:
Before unhitching, get rear bumper as level as possible.
Also before unhitching, check level from front to back with 2' level in front cargo area (below bathroom). When dropping front jacks, (think pull lever and holes here) try to use a minimum amount of extension so that when the unit is level the jacks have "travelled" the least distance possible.
Also, if the unit is not level side to side in the front (check below bath), adjust the front jacks distance from the ground to help offset and do some "leveling" of the front of the unit during the unhitching process.
Once the unit is unhitched, manually take it to level front to back.
What we do at this point is for a couple reasons. We stack blocks (rough cedar 2"x6"x11 5/8") 2 side by side, each layer stacked perpendicular for stability, up to as close to the bottom of the jack foot as we can get them.
When this is completed, we hit the auto level and watch the mid stabilizer jacks in case the raising of the corner jacks allows for and additional layer of blocks or two to be placed before they lower.
Has worked for us every time, without fail for about twenty setups now.
While it may sound tedious, having the jacks extend the minimum distance coupled with the rock solid foundation of the rough cedar blocks makes a world of difference for us in the stability of our home. We now have it down to a science, takes about ten minutes (unless roll-on leveling is required). And once we are in our minimally jacked up, maximally stabilized home, we are well pleased.
Hope that helps.
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