I agree. I removed the VR counter just so I could clean behind it and there was so much gunk there. It looked like someone had used some spray lube that had attracted dirt and grime. After I washed the counter, it runs with much less torque. Same for the split gears on the KC gear/clutch assembly. It's already starting to move better and I'm just getting started cleaning it up. I enjoy this part about as much as any part of working on these radios. I just don't like working on a dirty piece of electronic equipment.
Barry - N4BUQ > I think that the tendency is to over do gear lubrication, not under do it. > The > Preliminary R-390 manual says "It must be remembered that over lubrication can > cause more harm then no lubrication." I tend to agree having bought an R-390A > from the late Hank Arney that was so over greased, the kc and mc knobs were > frozen. A lot of solvent, detergent and denatured alcohol using an acid brush > mounted on a dowel to get deep into the gear works finally freed the binding. > There was no need to do a complete teardown. > > Our brother collectors of clocks do not lube gear teeth, just pivot points, > and > sparingly. The thought is that grease attracts dust and dirt which does more > harm then good. In the half dozen R-390A I have reworked, I have yet to find > a > worn gear. Has anyone? > > YMMV, > Jim > Logic: Method used to arrive at the wrong conclusion, with confidence. Murphy > > On Monday, September 2, 2024 at 05:55:29 PM CDT, Barry <[email protected]> > 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 > ______________________________________________________________ > R-390 mailing list > Home: http://mailman.qth.net/mailman/listinfo/r-390 > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > R-390 mailing list > Home: http://mailman.qth.net/mailman/listinfo/r-390 > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
