[R-390] Worn RF Deck ??

[rbethman]

The Y2KR3 Chapter 10 has its section on the gear train.

Scott Seickel has a very good write up on the complete dis-assembly and 
reassembly of the entirety.

He makes note of using 220 grit on the sides of the gears to remove the 
"edge" i'm referring to.

I am NOT implying that I have a worn our set of gears.  I was simply 
saying that "I" would gently hone the sides during this process in lieu 
of something like 220 grit.

The gears are not worn out, but I believe that this "edge" would be 
better taken care of by a gentle honing to remove this "edge" before 
putting it all back together.  I am looking simply trying to get the 
sides of the gears smooth.

The cleaning goes without saying, along with the lubrication.

Bob - N0DGN

On 6/6/2012 12:41 PM, chuck.rippel at cox.net wrote:
> "I think - and correct me if I'm wrong - BUT the methods presented so
> far
> will make it smoother to operate - BUT - absolutely will not resolve the
> issues of an old RF Deck with many years of use.  The instance that I
> have is one of the first Collins Contract R-390As.  The wear on the
> front panel said a lot.  I did NOT find this in my '67 EAC."
>
> "The issue that first bites anyone, is the wear on the sides of the
> gears.  Chuck please chime in on this!"
>
> I've not seen a worn out RF deck as yet.  There are several keys to
> sucessfully correcting the mechanical
> portion of the deck.
>
> 1- Cleaning
>
> 2- Lubrication
>
> 3- Mechanical Alignment
>
>
> Even if the split gears have worn teeth (within reason), if they are
> tensioned correctly the split gear will compensate for
> wear.
>
>
> Chuck Rippel
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