[R-390] Gear Train Question

[Barry Scott]

Aside from the various manuals, does anyone know of any teardown/rebuild
sites for the R390 gear-train?  There are some good articles on the R390A
but I don't see anything for the R390.  I've done an R390A so not
completely unfamiliar with the process and I think I can do it without
additional pictures, etc., but thought I'd ask.

In regard to this, is it the case that the entire gear-train can be
separated from the RF module without disassembling the gears and shafts?
If so, I might settle for cleaning and lubing it as one assembly as opposed
to disassembling each gear.  The gears in mine aren't particularly covered
with grease, etc., and might clean up good enough that way.

Thanks,
Barry - N4BUQ