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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