[TowerTalk] Stuck thrust bearing? Help needed.

[Bob K6UJ]

 Jon,
Thanks for the info.   

BobK6U
    On Sunday, January 20, 2019, 6:14:10 AM PST, Jon Pearl - W4ABC <jonpearl at tampabay.rr.com> wrote:  
 
 Hi Bob,


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73,


Jon Pearl - W4ABC



On 1/20/2019 2:02 AM, Bob K6UJ wrote:
>  I saw a picture of K3EJJ's split thrust bearing somewhere, forgot where I saw it.    Not sure how it works.  Looks like there is an inner coupling that clamps to the mast and rides on an outer coupling.  If it is a reliable thrust bearing it might be a good option to avoid having to remove all the antennas, mast etc to change to another thrust bearing.
> BobK6UJ
>
>
>      On Saturday, January 19, 2019, 6:40:49 PM PST, <john at kk9a.com> wrote:
>  
>  I would not assume that it is the bearing without climbing the tower. Since
> you mentioned having two bearing plus I assume a bearing inside the rotator
> you have a big potential for binding the mast. Not long ago I operated a
> Caribbean station that had a similar issue and there was a tower bracket
> that had fallen off and was jammed between the mast clamp and tower. You
> could also have cables binding or even a bad rotator. I'm not sure what a
> "truth table" is but if it is just measuring the motor resistance this will
> not tell you that the motor and gearbox is working properly. If it does
> happen to be a bearing there are split ones that can be installed around the
> mast, K3EJJ makes nylon ones that match Rohn's TB3.
>
> John KK9A
>
>

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