[R-390] More geartrain rebuild info

[Barry]

This geartrain was just a tad dirtier than my first one, but not by much.  I
did not tear down the first one because I had no instructions for putting it
back together.  Now that I've done the complete teardown on this one and
found what I have found, once I get this radio finished, I'm probably going
to tear down my first one and do a complete cleanup on it too.

After taking all the gears off, I took the cam/frame assembly to the
automotive shop here at work and washed it in one of their parts cleaning
tanks.  It didn't really do much to cut the dried grease.  I tried denatured
alchohol with not much better results and am now using kerosene.  That works
a little better than the other things I've tried, but it doesn't really
dissolve the dried grease without a lot of rubbing either.  While it might
work better, I really don't want to have an open container of gasoline.  Any
other good solvents?  Brake Cleaner?  Carb Cleaner?  Fire?

Barry(III) - N4BUQ