[hypoxia]

One strong caution...don't ask me how we know...

If you elect to use the "AIR UP" procedure by lifting the coach with the bags, and THEN jack stand it in place...

When you exhaust the air from your bags, the axle drops down, stretching the bags from their seats. You stand the chance of popping the bags off their beads; just like a tire.

When this happens, you will have NO WAY to lift the coach, or even the axles, to reseat the bags...unless you have a jack.

Therefore, be very mindful of letting the axle "hang on the bags" unless you have a Plan B (a jack).

That's a good point.  If you have Vibracoustic Air Springs they are a multi piece assembly which may unseat.  I have some Firestone bags which are one piece and although they can't unseat, Firestone has a warning about over extension of the bag saying it may reduce its lifespan and a warning of the possibility of the bellows blowing out of the crimped bead.  Firestone suggests using an upstop such as a cable or strap to prevent that.  My last coach had strap upstops.  One is visible in the photo I posted earlier beside the white pipe.