Not really, the jack tube is a sealed unit, and is considered to be “not user serviceable”. I haven’t had to do anything to my 18 year old jacks other than replace a couple of the plastic covers, which aren’t available any longer thanks to Lippert.
if I remember right, when you take the covers off you’ll notice that the motor gear and the jack gear have a generous amount of grease slathered on them. That’s about all you can check for on them.
The motors are replaceable as are the jack tubes, and there are still a few of those available though the price is going up.
I suspect if you were determined enough, you could figure out how to take the jack tube apart to lubricate it, but I haven’t had to resort to that on mine yet. It may come to that someday though.
:):)