Originally Posted by willk
They're just a threaded bar, handle at the top, wheel at the bottom. You open them up and grease the threads and the telescopic sections once a year - end of.
Problem is that the top bushing for the jackscrew is placed in the tube, then the top of the tube is crimped over (hence my "stuff that isn't supposed to come apart" line.) The bottom has the foot for the wheel welded on.
You *can* get the thing apart:
Drive the pin from the vertical gear and remove the handle and vert gear.
Remove the horizontal gear (drops in place)
Remove the pin and allow the shaft to drop out.
With a big pair of vise grips, pipe pliers, or whatever, bend back the crimps holding the jackscrew bushing in place, and remove the jackscrew.
Clean and grease the jackscrew (I use a wire brush on an electric drill to get all the rust and crap off), and reassemble.
Unfortunately, it usually seems to rust up again pretty quickly.
I have yet to find one that lasts any longer, so have resigned myself to replacing with the same product when it ticks me off enough (usually every couple of years or so.)
Haven't tried the new Fulton F2 model yet. I doubt it's any better inside, but looks better outside.