[TowerTalk] Mast froze in cold temps and would not turn

Don W7WLL w7wll at arrl.net
Fri Apr 10 00:31:09 EDT 2015


Interesting. I have a HG70-HD and it hasalso has  a thrust bearing on top, 
but mine is requires lubing and has two Zerk fittings. I keep the bearing 
well lubed using all-temp bearing grease. Never had the bearing freeze up. 
Will be interesting to learn what you finalize as the culprit. By the way, I 
also put a rubber cone on the mast over the bearing so water and all drain 
off over the tower rather than the bearing.  Standard item used on 2 in vent 
pipes in homes. Keeps the water out.

Don W7WLL



-----Original Message----- 
From: Gary Marks
Sent: Thursday, April 09, 2015 9:17 PM
To: Tower Talk
Subject: [TowerTalk] Mast froze in cold temps and would not turn

This past Winter, and as the year before, my mast froze in place when the 
temperatures dropped below freezing. I had previously thought that the 
problem was moisture getting into the rotator (Tailtwister II) and since it 
had been up for 25 years, I decided last Fall to rebuild it.
This past Winter it froze and would not turn again when temps dropped below 
freezing. The tower is a Hy-Gain HD-70.

Is there some area that requires lubricating between the mast and tower or 
possibly the thrust bearing although it is a bronze bearing that shouldn't 
need lubing.  Could water be laying somewhere and not draining.
Any suggestions as to what the problem might be ?
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