Check for voltage drop and start at the mains of the house and make sure all
the connections are tight. What you are describing are all the symptoms' of
a voltage drop in a single phase system and because it affects all three it
has to be something in common. Undersize wiring being run could play into it
also. I remember a ham I help who had an older home with updated wiring
complaining about the computer in the rear of her home shutting down and
when I check because of the time day it was an undersize pole pig
transformer that needed to be change. After the Pig was change her problem
was solved. Hope it gives you a direction to look. 73 Gene K2QWD
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of K5rr@aol.com
Sent: Thursday, April 19, 2007 2:25 PM
To: towertalk@contesting.com
Subject: [TowerTalk] US Tower problem
I have three TX489MDPL towers, which are 7 years old. From time to time I
have experienced situations on all of them where the motor stalls when you
try
to raise the tower sections, but everything is OK if you lower the sections
momentarily and then raise them. But recently on one of the towers the
motor
stalled when trying to raise or lower the sections. I was able to get it
going after manually turning the pulley on the gear box. I got to
wondering
about the oil in the gearbox. It appears to be ordinary motor oil, by
appearance, anyway, which is not what Hub City recommends. I'm planning to
change
it out with Mobil SHC 634 oil. Has anyone else had this problem and
changed
out the gear oil? Did it do any good? I sent an email to US Tower on this
subject, but have received no reply.
Dick, K5RR
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