[R-390] Gear Train Removal

[Barry Scott]

Make that Z223, not Z2223.

Thanks,
Barry - N4BUQ


On Wed, Sep 4, 2024 at 9:26 AM Barry Scott <72volkswagon at gmail.com> wrote:

> Well, I don't quite know how it happened, but I can no longer get all the
> cams properly aligned.  As I mentioned, I've removed the VR counter so
> that's one point of reference that I no longer have.
>
> I had been rotating the MC change gear one click or two and then back and
> no problem; however, I think I lost track of which way I had rotated it and
> now I can't get back to where 2.000 would normally be displayed by the
> counter.
>
> I'll mention that I've kept the Green Gear in place and, contrary to my
> previous comment, that gear does indeed keep the MC and KC gears
> synchronized and, given that, I don't know how they're no longer where I
> can get them back in sync.
>
> According to the manual, as part of the complete gear teardown and rebuild
> (which I still have not decided to do), one is supposed to be able to
> rotate the MC gear CW (which I presume is taken to mean "CW as viewed from
> the rear"), until it hits a stop point and then, back up to the nearest
> notch which should correspond to 0.000.  My presumption is that if I back
> off to the 3rd click, that should correspond to 2.XXX and rotating the KC
> shaft should eventually get the gears (and cams) in the 2.000 position.
>
> I found that there is something that causes a "stop" at full CW and full
> CCW.  I think that stop is happening as a function of the Geneva mechanism
> and not the 10-turn stops (which aren't engaged when the RF deck is
> removed); however, CW or CCW still won't let me get the gears/cams in their
> proper setting and am wondering if I'm now truly "stuck".
>
> Any help is appreciated.
>
> Additionally, to avoid getting the transformers' cores wet, I'm removing
> the slug racks and transformers while cleaning the gears and, right off, I
> found that one of the slugs (for Z2223) was broken.  I'm sure that didn't
> help performance any.  I have it CA glued back together so that should help
> when I get this all reassembled.
>
> Thanks again,
> Barry - N4BUQ
>
>
> On Mon, Sep 2, 2024 at 5:55 PM Barry <n4buq at knology.net> wrote:
>
>> While I have the RF Deck out, I'm going to clean and lubricate the gears,
>> rollers, etc.  Reading the manual, apparently the from "apron" of the gear
>> train can be removed without all that much difficulty.  If I remove that
>> apron, do the gears stay with the main part of the deck or does some of
>> them come off with the apron?
>>
>> I'm asking because, while I'm still considering a complete teardown
>> (which is just a bit more daunting than the A model which I've done
>> before), it might be good enough if I can maximize the exposure of the
>> gears and just settle for cleaning/lubing them in situ.  Any comments on
>> that?
>>
>> Thanks,
>> Barry - N4BUQ
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