> The Hub City W300 gearbox on my US Tower 85 ft rotating mast appears to
have
seized after 12 years. Un fortunately the tower is at the 55 ft level and
will neither raise nor lower. Fortunately, it is at a safe height with
respect to wind. Unfortunately, I am uncertain how to get it down to
repair/replace the gearbox. The lifting cable drum mounts on the gearbox
output shaft. I cannot pull the gearbox as the cable drum system is what
keeps the tower from freefall. I do Have the tiltover fixture. There is a
SteppIR DB-18E yagi at the top. I am resisting bringing in a crane to
support the tower. Any suggestions?
Hiya, Jim --
I'd get a comealong and Klein grip to grab the main cable and take the
strain off of the gearbox. Now you can lower or raise the cable slowly and
under control. With a little slack, you should be able to try to run the
gearbox by hand and see what happens. If it's the gearbox, that path is
pretty clear cut. If not, then you get to the next possible problem.
Cheers & GL,
Steve K7LXC
TOWER TECH
206-890-4188
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