Needs to be greased and lubed in different areas.
On my trailer, underneath there are two grease fittings, one at the front...
One at the rear....
I use the same grease (synthetic) that I use for the wheel bearings. But I guess any high pressure lithium will do.
Also at four corners where the spring goes up a conduit to push the corner braces up. In my case, I remove the two bolts from the outside....
Pull down the conduit (carefully and not that far)
Then squirt in 30W oil into the conduit so that oil can lubricate the large spring inside; especially at the bend...
(If the conduit does not want to go back up into place, take a socket and manually turn the motor bypass bolt in the winch assembly. Just one turn to lower the roof will do it. Only had this happen once.)
Also, remove the small round cap on top of the winch assembly, and make sure there is grease packed in their covering the manual lift bolt (I believe it is 5/8").
Then remove the bottom cover of the winch assembly (4 screws), and spray the bottom of the drum and gear areas with some oil (I use liquid wrench lube, but I guess WD-4 would be ok).
This is all from the dealers site where I purchased the unit from....Roberts Sales, Denver.
The owner manual that comes with the popup explains about the requirement for, at least yearly, greasing of the lift assembly.
NOTE: This is for the old style motor that requires grease inside the motor assembly; I understand from reading on here, the new assembly does not. But I would bet that the tracks would still require some grease in the fittings and the corners would require some oil.