[R-390] PTO Problems

[Jon Schlegel]

Craig,

The desiccant.  So that's what all that stuff is.  There is no 
evidence of any type of bag or container they use to contain that 
stuff and only now have I put it all together as to what happened.

Is there a specific procedure for setting the compensation stack if 
it comes to that?  Also how easily should the shaft turn?  With the 
Oldham coupler plate removed, the shaft is turnable with my fingers 
but with difficulty.  This is the original reason I suspected a 
problem in the PTO.  What about desiccant?  Should I insert a new 
pack and if so, where?

Jon


At 04:55 AM 11/3/2007 -0700, you wrote:
>Jon,
>
>I had the same issue with a PTO in a Motorola R-390A. After applying liberal
>amounts of elbow grease, life was good. The desiccant was scattered
>throughout the PTO, stuck to the shaft that moves the widget along the
>corrector stack, ugly but fixable.
>
>First, I wouldn't do anything to move any of the plates of the corrector
>stack! Clean the inside of the PTO as best as possible. Check the condition
>of the little spring used to keep pressure between the widget and roller
>which moves along the corrector stack. A little De-Oxit here didn't hurt my
>PTO. A drop or two of synthetic 90 weight on the threads of the shaft didn't
>seem to hurt either. Reassemble the beast and adjust the end-point per Y2K
>manual. Keep your fingers crossed, the linear points are close and the
>plates of the corrector stack are where they should be. If the plates need
>adjustment, it will be a long night.
>
>Wd8kdg
>Craig,
>
>-----Original Message-----
>From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
>On Behalf Of Jon Schlegel
>Sent: Friday, November 02, 2007 10:17 PM
>To: r-390 at mailman.qth.net
>Subject: [R-390] PTO Problems
>
>Hi all,
>
>The PTO shaft seemed way too stiff so I opened it up and found this
>amazing colony of crystalline entities growing all over inside.  It's
>a real mess.  It looks like it had a LOT of moisture in it at one
>time but the rest of the receiver doesn't really show signs of water
>problems.  Nevertheless the PTO looks original to the receiver (both
>Motorola).
>
>Should some kind of repair attempt be made or should go out with next
>Thursday's trash?  I have an interesting photo but I suppose that
>would be inappropriate for the list.
>
>Regards,
>Jon
>
>
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