[R-390] PTO Problems

[Craig C. Heaton]

Jon,

Yes, I've heard the stories about a bag, etc., used to contain the
desiccant. In my PTO there seemed to be a rubber seal towards the end of the
PTO that holds the bearing for the shaft. The seal broke and let the
desiccant move throughout the PTO. When I got to the third layer of
disassembling the PTO; seal, desiccant, broken spring and all that good
stuff dropped to the work bench. 

After getting the desiccant out of the PTO and off of the square thread of
the shaft, just a smidgen of 90W synthetic oil should do the trick. The
shaft will turn like hot butter, even after complete reassembly of the
receiver. (the bushings in which the shaft(s) pass must be in alignment)

I didn't have to mess with the corrector stack! A good cleaning, a little
De-Oxit, seems to get everything back to square-one. As I check frequency at
every 100KC, all is well within spec, after adjusting the end-point.

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: Saturday, November 03, 2007 5:32 AM
To: r-390 at mailman.qth.net
Subject: RE: [R-390] PTO Problems

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