getpower1 wrote:
Two things that were pointed out that are particularly interesting to me. 1)the fact that one jack may be off the ground altogether when lowering. I have experienced this and thought "well that can't be good, but how would I avoid it?" It's good to know that this may be unavoidable.
Not only unavoidable, but a non-issue. As long as you correct the situation in a reasonable timeframe, and don't walk away and leave the camper resting on 3 legs.
With manual jacks it's very easy to keep ahead of this because you are jacking each corner in turn. After you've gotten some practice at it you will even develop a feel for how many extra pumps/cranks to give the "short" jack when it happens so it's not constantly off the ground as you raise the camper.
For releasing the valve, if it is like a typical bottle jack, a pair of vise grips on the handle will give you much finer control of the valve if/when it is overtightened.