[R-390] R390 Clutch/Differential Gear Assembly Details

[Scott, Barry (Clyde B)]

Mike,

I think I did the same thing.  If I recall, I put the side with the "sharper
edge" toward the harder material.  Other than that, I don't think it really
matters.  It is just a spring that pushes the same in either orientation.  I
could be wrong, though.

I went to the trouble of polishing the bronze (brass?) clutch disks.  I was
having problem getting the disks to slide freely and tried a bit of oil.
Big mistake.  The oil made the disks stick together.  I'd suggest leaving
them dry.

Regards,

Barry(III) - N4BUQ

> 
> Hi All,
> 
> I am working through a rebuild of my R390A RF deck including
> a complete teardown and cleaning of the gear train. 
> Everything was going fine until I decided to clean the split
> gears on the clutch/differential gear assembly.  The 2 split
> gears were froze together.
> 
> I should know by now when disassembling something to leave
> it in one orientation.  Well, I didn't and turned it and all
> of a sudden I have a handful of spring shims without a clue
> on how to reorient them upon assembly.  Here is a picture of
> the sping shims - notice the names of the JPG picture files
> :-)
> 
>      http://home.comcast.net/~bipi/miscpix/booboo1.jpg
> 
> I pulled apart the rest of the clutch assembly and did my
> best to keep everything in its original orientation as shown
> in the next 2 pictures.
> 
>      http://home.comcast.net/~bipi/miscpix/booboo2.jpg
>      http://home.comcast.net/~bipi/miscpix/booboo3.jpg
> 
> My best guess for spring shim orientation is shown in the
> next 3 pictures.  But they could easily be oriented the
> opposite way (hell, maybe it doesn't matter).
> 
>      http://home.comcast.net/~bipi/miscpix/booboo4.jpg
>      http://home.comcast.net/~bipi/miscpix/booboo5.jpg
>      http://home.comcast.net/~bipi/miscpix/booboo6.jpg
> 
> Anyone on the relector here have some first hand knowledge
> of their proper orientation?
> 
> I have reassembled the unit and it appears to function as
> before (best I can tell without having it in the receiver)
> but I don't trust a guess and would sure like to get this
> confirmed before I completely reassembly the RF deck.  Here
> are pictures of it reassembled.
> 
>      http://home.comcast.net/~bipi/miscpix/booboo7.jpg
>      http://home.comcast.net/~bipi/miscpix/booboo8.jpg
> 
> While I'm at it, if anyone knows the order orientation of
> the brass spacers shown previously in pictures 2 and 3 so I
> can confirm their positions that would be great too.
> 
> Anyone have a current e-mail address for Scott Seickel?  The
> one listed in his gear train pictures no longer works.
> 
> Thanks in advance for the help.
> 
> 73 de Mike
> K7PI
> Mercer Island, WA
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