Air powered retractable landing gear, oleo struts, valves and brake systems occasionally need maintenance. If you ever have to disassemble any of these systems to clean them, there will be a need to replace the O-ring lubricant.
Parker Super O-Lube is what we use at the Dreamworks for all of our O-ring lubrication. It is a high viscosity lubricant that will not clog filters or lines, just use it sparingly. Packaged in this convenient 1/2oz tube, it is perfect to keep in your flight box.