[pgermond]

Originally Posted by lnfletcher

You must not have the correct air pressure set because they will go down without weight on them, that is the purpose of pressurizing the tubes.

If I have to do extensive work underneath, I also use it as a jack and then use jack stands.

From the Quickjack site "The small air cylinders welded to the sides of the main hydraulic cylinders act like air springs. Because the static weight of the lifting frames is minimal, the air cylinders assist lowering the frames after the vehicle's tires touch the floor, or if the lift was ever raised with no load."
and
"Inflate each air bottle cylinder between 40-50 psi. Be sure to pull the connector off quickly to minimize air loss and don’t forget to replace the dust caps as they help to retain air. The cylinders will require periodic recharging."

Mine does go down easily without weight.

Larry, That news to me. I always check/inflate the cylinders. I'll give it a try next time I use them and post the results. In the meantime - thanks!