[R-390] How is this gear supposed to work?

[Grayson Evans]

This is a bit of an obscure question.
I am having trouble getting the “clutch” gear (21 in the exploded diagram of the gear assembly) to work properly.
This is the gear on the front of the assembly where part of it engages the Kilocycle gear of the V.R. wheels.
This is an odd two part gear, a movable split gear on the back with a fixed gear, attached to the shaft, in the front.  There are two pins on the back gear that fit in two slots through the front gear.   Three more pins are attached to a plate sandwiched between the two gears.

I took this assembly apart to clean it.  It, like most of the gears, were totally gunked up.   When I put it back together, it is extremely difficult move the back gear back and forth.  Problem is I am not sure how this assembly is supposed to work.  I am assuming that at the stop of the kilocycle range on the VR counter, the two gears slip to allow some “overshoot” on the turning.   I have no idea if this makes any sense.
It looks like the clutch action adds some resistance to this movement, but I don’t know how much resistance.

Has anyone every disassembled this gear and put it back together successfully?  when back together should it be easy (by hand) to move the front/back gears back and forth in the slots? or require a LOT of torque?

I haven’t been able to find any kind of exploded diagram of how this thing goes together.  I think I assembled it exactly like i took it apart, but maybe I did something wrong.

Grayson
TA2ZGE - Ankara, Turkey
KJ7UM