Tower: US Tower HDX 589 Crank Up. Vintage 2004, up for 9 years.
Issue: There is so much slack in the pull down cable that the cable turns are
coming off the drum when the tower is extended (fully raised or nearly so.)
This allows the cable turns to overlap on the drum when the tower is retracted
(lowered.) The spring loaded eyebolt at the cable end attached to the bottom of
the top section has reached its maximum travel. That is to say, the eye of the
eyebolt is right up against the steel bracket attached to the top section so the
spring cannot provide any additional tension. (There is a nut on the threaded
shaft adjacent to the eye.)
History: The pull down cable has always been slack since the tower was first
installed. Periodic adjustment of the nut that compresses the spring(s) has
been necessary to keep reasonable tension on the pull down cable. There is no
evidence of slipping at the Crosby Clamp.
Help! Has anybody encountered this problem? What was the fix? Can the pull
down cable length be safely adjusted (shortened) by a layman (me) by pulling it
through the Crosby clamp? If a professional is recommended, who?
Comments Solicited from UST owners and those familiar with UST motorized crank
ups (HDX 589 MDPL, HDX 572 MDPL.) Please, no WAGs (wild-ass guesses.) -:)
Send direct comments or questions to me using my call at arrl net. You know the
format.
Ned, K1GU
East TN
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