Originally Posted by Judge
There are advantages to having the jacks down.... even on a level site.
When you have the jacks extended so they are making solid contact with the ground you take the suspension out of the equation and eliminate any movement and changes in level as people walk around the coach.
Without the jacks are down, the suspension will allow the coach to move in the area where additional weight is being applied. This may not be a real issue but if you have a big and heavy slide that is extended, you can start having the coach move in one area where it is not moving in another area and create some torque on the walls, slide, etc.
It really is the same reason that it is recommended not to have the slide out when using the jacks.
Even on a level site, I will put the jacks down enough so the coach doesn't move as a result of the suspension absorbing shifts in weight when moving around the coach.
I agree for spring suspension
When I release the air suspension the rig is darn near rock solid
40,000 pounds and 8 tires does make a difference