[R-390] Cosmos PTO, spring-loaded core?

[Tim Shoppa]

OK, my wife is sick, the kitchen is a mess, my three kids are
running around the house screaming, and of course I've decided
to pull apart my PTO.

I've gotten roughly to where the pictures at

  http://www.r-390.com/cosmos.htm

but of course I've got some questions:

I see the ring and ridge that ride the linearity adjustment screws.
(Interestingly enough *all* the screws are present on mine. Looks like
they take a 0.028" hex key but can't find mine at the moment.)
I see the core that is supposed to ride the linearity adjustmet
core, and I find that it sits on the end of a threaded rod and
presumably a black nub on mine (it's red in the pictures at the
URL above) is supposed to ride the ring and move in and out with
a spring pushing it.

BUT... I don't feel any pressure when I press on the nub.

Is it time for me to tear off the two screws holding the
linearity adjusting coil and look for the springs under there?

Or do I have to "press harder"?

Tim.