Broken factory Dutton-Lainson jack?

[Mtschelling]

Have a 2016 SX192. Have had no issues with the jack to this point after about a year and a half. Although greased regularly; it has now become very difficult to crank. Hold the wheel in place and the handle won't budge without a good amount of force. At this point it took an extra set of hands to get it jacked down and supported (one holding the wheel one cranking).

Am I SOL? Anyone else had this experience? May attack getting the jack off the trailer and apart and see what the issue is.

EDIT: thinking it may have been over-cranked (hyper-extended) at some point.

 

[Jebinok]

My jack was doing the same thing. the grease zerk at the top only greases the little gears. the problem is down lower where the screw goes into the tube. I drilled a hole and tapped it to accept a another zerk.
I sprayed WD40 (Alot) and freed it up and then added about a half of tube of grease, that fixed it. Do a little measuring to figure out where the grease will be on the screw part of the jack. Good luck