HWH Levelers-Final Fix?

[dutchwind]

I have followed the threads regarding HWH levelers that won't retract.
I also have one leveler that partially retracts, then giving it
the silicone treatment it retracts fully. It doesn't look as if this
problem is going away.
Is a final fix to replace the jack?

[dougrainer]

The ONLY correct repair is to replace the jack cylinder. Doug