Aeolian had a lot of trouble designing a reroll/repeat/shutoff
system that would work and be cheap to build.  They finally settled on
operating both the reroll and shutoff pneumatics from the same valves.

The switch pneumatic was tubed through a constriction so it would
collapse slowly and its extension would not reach the switch before the
transmission had shifted into reroll, re-covering the tracker bar hole.

If the motor can be shut off manually without having to pull the plug,
your problem is most likely pneumatic rather than electrical.  Should
the switch pneumatic have the slightest pinhole leak -- which it
probably does after all these years -- it will appear to collapse
normally, but won't have sufficient power to activate the switch.

Jeffrey R. Wood