[TowerTalk] M2 OR-2800 Rotator Problem

[Roger (K8RI) on TT]

This is what I did to keep water out of a PST-61.  It should work for 
most rotators
http://www.rogerhalstead.com/Gears.htm  Start with photo 22 through 31  
Cost was only a couple bucks.

73

Roger (K8RI)



On 2/18/2016 Thursday 2:18 AM, Riki, K7NJ wrote:
> The rotator was received, used, as a gift from a friend and has been working
> flawlessly for about 10 years until this winter.   I'm not sure about the
> specific model number suffix (after OR-2800), but this has an AC motor with
> the motor capacitor installed inside the rotator housing.
>
> When the weather gets very cold - below freezing - it won't rotate. After
> the temperature warms up to within a few degrees of freezing, it begins
> working again.   I believe that the problem is due to one or more of the
> following:
>
> .         water ingress
>
> .         old grease that needs to be changed
>
> .         defective motor capacitor
>
> When the weather warms up, I will remove the rotator from the tower and
> proceed to examine and overhaul it.  My questions are:
>
> 1.       Does anybody know of a water ingress problem and if so, what was
> the cause and how was it fixed?
>
> 2.       I will degrease and re-grease the rotator with a high quality low
> temperature grease.  Molykote 33 Extreme Low Temperature Bearing Grease
> (Medium) looks good, but it only has a 5 year shelf life.  I'm not convinced
> that it will be good for many years.  Any recommendations for a time-proven
> grease that has not been a problem with temperatures as low as -30 F would
> be appreciated.
>
> 3.        I would like to install a highly reliable motor capacitor.
> Suggested manufacturers (and those to avoid) would be appreciated.
>
> 4.       Is there anything else that should be cared for while the rotator
> is in the shop?
>
> Thanks for any help.
>
> 73, Riki Kline, K7NJ
>
>   
>
>   
>
>
>
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-- 

73

Roger (K8RI)


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