Ned:
I have replaced the cables on my HDX 589mdpl three times.
Slack on the pull down cable is a common issue after replacing the cables.
The slack is only evident when the tower is fully up. (obviously)
Solution:
When the tower is fully extended: 1.) loosen the cable nut holding the pull
down cable on the drum 2.) pull the slack in on the pull down cable using a
come-a-long, (or by hand) and 3.) wrap the slack tightly on the cable drum
and re-tighten the cable bolt on the drum.
Sometimes this is required a few times over the first year to fully
stabilize the cable slack.
I must confess I do not know why this happens, but I suspect it may be
because of stretch in the lift cables.
de steve ve6wz.
http://www.qsl.net/ve6wz/intro.htm
--------------------------------------------------
From: "Ned K1GU" <thewalruswaspaul@bellsouth.net>
Sent: Monday, July 01, 2013 6:18 PM
To: <towertalk@contesting.com>
Subject: [TowerTalk] Slack Crank Up Cable
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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