[R-390] Planetary Gear Assembly

[Barry]

Just thought I'd pass along a tip.  When I tried to reassamble the three
planetary gears to their mating gears, I could never get them to go together
without something going wrong.  Preloading the anti-backlish gears and
holding them with hemostats just wouldn't work.  The assembly would bind and
be misaligned.  I never did figure out what caused this, but I did figure
out a way to successfully reassamble them.

The method I used was to assemble the planetary gears without the clip that
holds the anti-backlash gear in place.  The assembly will go together quite
easily this way and there is room for the anti-backlash gears to move out of
the way slightly so that they don't interfere in this first step.  Of
course, you pre-load the anti-backlash gear in the center at this point as
it can't be done later.

After tightening the three screws that hold the planetary gear shafts, you
can then load each anti-backlash gear, one at a time.  There is sufficient
clearance just above the center gear to allow this.  It's a bit tricky to
get both nibs of the internal spring into their respective holes in each
half of the gear, but it can be done.  With the anti-backlash gear cocked
just a bit to clear the mating gear, you can put a few teeth of spring load
on the anti-backlash gear half and then let it slide down onto the mating
gear.  Press the "C" clip in place and proceed to the next gear.  It really
worked out rather easily.

AND, if you want some real fun, take a toothbrush and some Brasso(tm) to
that big brass gear assembly that is comprised of two larger gears that are
riveted together.  Wow.  Does that thing ever shine up nicely!  Yeah, I know
it won't work any better shiny than dull, but there's just something about a
sparkly gear that satisfies my R390A rebuilding soul.

Happy rebuilding,

Barry(III) - N4BUQ