Let me be more descriptive of the problem because the title line is too short:
One of the two small white cog axis of the Lift, that transfers the motion from the main cog of the processor to the drum, often snaps off during rotation.
Specifically during the clockwise rotation.
And more specifically usually after a second rotation. The first one goes well, then during the first circles of the second rotation it happens.
That happens with any drum size, load, weight and rotation speed.
The motor suddently stops, screams with creaking sounds and if not turned off instantly, the cog head of the white axis pops out. Its fairly hard to pop it out by hand, so I am not sure what makes it go like this. I've always been kind of the Jobo CPP-2 unit which was bought new about a year ago and never had problems until recently.
I haven't been able to trace the problem and can be really disastrous if it happens during film development.