[TowerTalk] M2 Orion 2800 question

[Les Kalmus]

I experienced this. The cause was the small 1/4" SS bolt into the top of 
the output shaft had come loose which allowed the shaft to drop. This 
caused a lot of play between the splines inside the base tube of the 
mast plate and the splines on the output shaft. I had to replace the 
shaft. Ultimately, I had to replace the mast plate too. If things aren't 
worn too much you could probably tighten that bolt without replacing 
anything. I used Loctite on it to make sure and never had the problem again.

Les W2LK


On 7/7/2018 5:14 PM, Dick Allardyce (N4RA) via TowerTalk wrote:
> While working on my tower yesterday I discovered a problem with my M2 Orion 2800PX rotator.  I noticed a lot or rotational freeplay.  Probably about 20 degrees.  In addition, the output shaft wobbles about its axis by about the same amount (10-20 degrees).  I didn't know I had this problem so I was under the impression that the unit was working properly.  I suppose the mast was holding the pieces together.
>
>
> My question:  Has anyone had a similar problem and what might be involved to fix it?  Specifically, is this a DIY repair or will the whole unit have to go back to M2 for repair.  The Operating Instructions has a drawing of the interior that leads me to believe the internal  thrust bearing might be compromised.  That could account for the wobble, but I don't know about the rotational freeplay.
>
>
> Any theories or suggestions?
>
>
> Thanks
>
> Dick
> N4RA
>
>
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