[TowerTalk] M2 Orion 2800 question

[Grant Saviers]

A used 2800 I acquired must have had the same problem.  The prior owner 
put a cut off closed end wrench on this bolt, secured with another thru 
screw thru the handle stub so there was no way for the bolt to loosen.  
Also easy to take apart.

Grant KZ1W

On 7/7/2018 20:23 PM, Les Kalmus wrote:
> 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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