[TowerTalk] M2 Orion 2800 Rebuild?

[Robert Harmon]

Rob,

Please keep us informed on what you find.   I am installing a new M2 Orion 2800 this month.
I am planning on improvising a sheet metal skirt that will attach to the top of the rotator that 
will keep rain away from the top of the housing.  I understand that water can get into the rotator 
thru the top seal and cause problems in some cases.  

Bob
K6UJ



> On Jul 6, 2015, at 4:31 AM, Les Kalmus <w2lk at bk-lk.com> wrote:
> 
> Hi Rob,
> 
> They're easy to work on. The outer shell has an upper and lower part with a plate between.
> The shaft and its large gear and the limit switches are above the plate and the motor and reduction gear train are below.
> The bottom of the clamp sits on a thrust bearing in the top half of the shell that may need some work to free up if that's what's rusty.
> 
> You need to be careful disassembling things so you can reassemble them correctly. There aren't any loose ball bearings as far as I remember.
> On mine, the gear box and motor were filthy, probably the dirtiest, greasiest job I have ever done and I've done a few cars and tractors.
> 
> I have a few pictures I can send you and some tips if you are interested but at the moment I need to leave for an appointment so no time to write it all out.
> 
> 73, Les W2LK
> 
> 
> On 7/6/2015 1:26 AM, Rob Santello wrote:
>> Hi Group,
>> 
>>  I just acquired a very used M2 Orion 2800 rotor that has had a tough life turning a full size MonstIR SteppIR for the past 9 years. It was working when removed but had some rust on it and the 1/4" bolt that holds the plate onto the shaft was broke with the threaded part remaining in the shaft. It can hopefully be removed with an easyout extractor. I don't think that will hurt the rotor but mostly wonder how difficult it is to open it up for an inspection to check its overall condition. There are plenty of documented rebuilds of Hy-Gain rotors on the web but I can't find any example showing someone rebuilding one of these. I know water getting into the 2800 has been a problem and I'm concerned with the visible rust on the top that there might be more internally. So how difficult is it to open one of these up  to take a look inside. Is there a specific procedure or ideal sequence of steps that should be observed when opening one and appreciate any pointers as to what I need to check once inside?
>> 
>>  And while I'm here, does anyone have a used Green Heron RT-21 controller they would consider selling?
>> 
>> Thanks,
>> Rob
>> K6DQ
>> 
>> 
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