[R-390] Gear Train Guru Wanted

[Joe Foley]

--- scott <polaraligned@earthlink.net> wrote:
> I'm about to do my 390A geartrain.  While I am
> certainly no expert, (first
> time)
> I'll be happy to shoot digitals.  I'll shoot them in
> full resolution (3
> meg).  They can
> always be compressed.  I  was going to do it for
> myself anyway.  Might need
> them
> as a guide putting the gear train back together. :-)
> 
> Scott
++++++++
I did one, its not that bad!

Hone all the mating gear sets with a wet stone, like
Nolan said, use a dental pick shaped like a hook to
align the cams, use small Pony clamps to hold the
spring tension on the double gears, the plastic shoes
on the clamps won't mar the gears.  The Geneva drive
is a pain and touchy to align.  You might need to
straighten the dial lock disc, it is not easy to
assemble onto the shaft as the notch is tight on the
roll pin make a note of this at disassembly.  Check
the KC CHANGE shaft for true, it may be bent slightly,
its a target for getting knocked sideways.

Pull the rack springs off before you go too far with
this, if the racks snap down the cores will fall of
the springs!!

Note the insulators on the Antenna trim shaft, clean,
clean.

There's a pinion gear, it runs on a much larger gear,
on the right-hand side, about the middle of the deck. 
Its about 1" in diameter with the tension spring
INSIDE the two halves, neat, huh!?  This gear will
have BIG burrs on it because it makes so many turns
against the larger gear, mine was frozen because of
the burrs,.......240 grit sandpaper!  I didn't drive
out the pin.

Note the thrust washers, they may be in the right
place, they may not.  Mine weren't!

Impossible to tighten the post that the Geneva drive
runs on!  Well,.... without taking the front of the
deck off, I didn't.

Anyone want to hash over the proper assembly of the
clutch?  Oh, boy!

Joe

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