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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