> ? A couple questions. I installed a G800 in a 25G tower with a thrust
>bearing top plate, that turns a JK Navassa 5 beam for a friend. At the
>beginning and end of rotation, the torque from the beam was causing the G800
>to twist slightly on the plate, most likely from the bolt holes being? larger
>in diameter than the bolts. Apparently the grinding sound was a bit unnerving
>to the operator. So with a short wrench so as not to be able to easily strip
>the bottom casting, I incrementally and carefully started tightening the bolts
>to get to the point where it would not slip. So, you are probably smiling as
>you know what happened next. Yes, I stopped after stripping the first bolt
>hole in the casting. Fortunately, a new bottom casting is not that expensive
>from Yeasu and is on its way. So my questions are:1. How difficult is it to
>replace the bottom casting on a G800?2. Any thought on how to install the
>rebuilt G800 and not have it slip on the plate? Maybe something as simple as
>putting a star washer on each bolt between the plate and the bottom casting?
> Yes, you should have some sort of locking washer between the bolt head and
>the plate or anything you don't want to slip. But this whole episode has
>me confused. If the bottom bolts are properly tight, how is it possible for
>the rotator to move? Is it because of the broken casting? I have never
>heard of a bolt breaking the bottom casting unless of course you were
>overzealous and overtightened it. Is that what happened? Cheers,Steve
>K7LXCTOWER TECH
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