hershey wrote:
I have one rear jack that is very slow to retract. Silicone does indeed make it work as well as the others. Mine has a grease zerk at the very bottom of the cylinder that I pump a small amount of lithium grease into now and then and that seems to help for the longest time.
This exactly describes mine(Power Gear no doubt). It is strange that the slow one is the one with the grease zerk. I would not put anything other than silicon on the piston rod. Slick and dry will not attract dust as bad as slick and greasy.