[TowerTalk] Belt Slippage on LM-470 Towers

WA3GIN in Alex. City, VA wa3gin at erols.com
Tue Nov 22 23:15:51 EST 2005

Rubber begins to decay almost immediately after it is pressed into
shape. That is why tires on RVs although they have only a few thousand
miles have to be replaced. They aren't safe after more than three years
on the wheel.
Your belts are probably aged and a bit stretched.  Replace the belts
every couple of years and don't forget to replace the steel cables too
or you'll get a not so good surprise one day!


-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of paul at w8aef.com
Sent: Tuesday, November 22, 2005 9:45 PM
To: k2xx at swva.net; towertalk reflector
Subject: Re: [TowerTalk] Belt Slippage on LM-470 Towers

I have not had any problem with the belt on my '470 slipping, but then
don't have cold WX in Arizona <grin>.

It could be the clutch on the driven pulley that is slipping, and that
adjustable.  Just keep in mind that the clutch is a safety device,
to slip when the tower is fully extended against the stops.  Slipping 
clutches save broken cables (and destroyed towers).

de Paul, W8AEF

----- Original Message ----- 
From: "Joe Giacobello" <k2xx at swva.net>
To: "towertalk reflector" <towertalk at contesting.com>
Sent: Tuesday, November 22, 2005 11:18 PM
Subject: [TowerTalk] Belt Slippage on LM-470 Towers

> Both my LM-470s tend to slip when I attempt to raise them, especially
> cold WX.  I have tightened the belts about as much as possible on
> several occasions.  In one case, wire brushed the large pulley to
> corrosion, etc.  Is there some kind of compound that can be applied to
> increase friction and eliminate slippage?
> 73 and thanks for your help.
> Joe
> K2XX


See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with
any questions and ask for Sherman, W2FLA.

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