[R-390] Lubrication of KC and MC Bushings

[Barry Scott]

Yes.  I found that separating those with a thin blade and some
naphtha helped quite a bit for some of those twinned gears.  I went so far
as to take the front plate off of the gear train so I could better access
the remaining gears and allow me to clean the ones that were part of that
front plate assembly much better.

The twinned gears on the KC and MC shafts were very, very stuck together
but I was able to disassemble them completely and get them cleaned up.

I'm still a bit worried, though, that there is some binding in that shaft
that extends from the Oldham coupler of the PTO, through that "spider"
support, and on through the front panel.  From what I can tell, that's
where the most torque is coming from.  I hate to have to disassemble things
to that point yet again but I may have to, if. for nothing else. to
determine one way or the other where that additional torque is coming from.

I see there's a pin in the collar at the forward side of that spider
support so getting things apart might be a bit more difficult than I'd
hoped.

I may be able to simply loosen the clamp that holds the large twinned gear
which will enable me to spin just the part of the shaft that goes from
there back to the PTO without incorporating the torque from the geartrain.
Of course, that will lose the sync to the PTO so I'll have to do that again
but that's not very difficult.  We'll see how that goes.

Thanks,
Barry - N4BUQ


On Sat, Oct 5, 2024 at 1:14 AM Ing. Giovanni Becattini via R-390 <
r-390 at mailman.qth.net> wrote:

> I had a similar problem and finally I discovered that one of the twinned
> gears had the two plates stuck each other. I could not find a better
> solutions than slightly separating them with a blade and putting a little
> quantity of WD40 between.
>
> > Il giorno 5 ott 2024, alle ore 04:12, Barry Scott <
> 72volkswagon at gmail.com> ha scritto:
> >
> > I found that lubrication figure.  It is Figure 89 on page 114 of the TM
> > 11-856 manual.  It does not mention lubricating the KC or MC shafts so
> now
> > I'm not sure if I should.  I wouldn't think a few small drops of
> synthetic
> > oil would hurt there.
> >
> > Thanks,
> > Barry - N4BUQ
> >
> >
> > On Fri, Oct 4, 2024 at 3:40 PM Barry Scott <72volkswagon at gmail.com>
> wrote:
> >
> >> Is there an "official" method of lubricating the bushings where the KC
> and
> >> MC shafts extend through the spider-supports and their associated
> bushings?
> >>
> >> I thought there was an illustration somewhere in the manuals that shows
> >> where the lubrication points are but I cannot seem to find that now.  I
> was
> >> hoping that might show those bushings but I don't know that for sure.
> >>
> >> I'm asking all this because the KC shaft is starting to become a bit
> more
> >> difficult to turn and I'm wondering if those points might be the
> problem.
> >> It isn't due to the threaded bushing that goes in the front panel
> because
> >> I've loosened that one to make sure it can float as needed so I'm
> looking
> >> at the bushing(s) in that part of the frame as a possible cause.
> >>
> >> Thanks,
> >> Barry - N4BUQ
> >>
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