[pgermond]

"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."

Larry,

Can you provide a link to this information?