[TowerTalk] MA550 noise when lowering

[Roger (K8RI) on TT]

On 10/28/2014 7:12 PM, Richard (Rick) Karlquist wrote:
>
>
> On 10/28/2014 1:46 PM, Jorge Diez - CX6VM wrote:
>> Hello
>>
>> I owned a used tower MA550. Aftee I installed it, no noise when 
>> lowering the
>> sections one inside the other. But recently I noticed that when I was
>> lowering it, aftr some 15 ft it started to do a very high noise
>
> First thing to suspect is bad pulley bearings.  Especially being
> a used tower.

And that high pitched squeal certainly sounds like a dry 
pulley/bearing/bushing, or a dry metal to metal surface. (Oilite 
bearings/bushings don't usually do that.) Quiet to begin with the squeal 
building sounds like a dry, tight bearing getting hot with use.  If it's 
steel there will be some rust powder.  Dry bearings are harder to find.  
Don't use WD40. Try spraying one bearing at a time with LPS-2. It leaves 
a lubricant behind. One at a time will find the specific bearing/pulley 
quicker, but that squeal probably means accelerated wear, so shooting 
them all with the idea toward replacement might be better for the tower.

73 and good luck,

Roger (K8RI)

>
> Rick N6RK
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-- 

73

Roger (K8RI)