Atmos 519 pendulum lock not right

[ALR guy]

Hi folks,
When I received this clock for repair the pendulum was loose and turning the locking arm did not change anything. Working with the pendulum and no suspension spring I can see that the locking mechanism does not lift the pendulum far enough to engage the locking ring against the bottom surface of the locking plate.

I suppose I could lower the ring on the locking post to raise the post as needed but I'm suspicious that a part is missing:

1. There's a pointed set screw used to lock the upper ring.
2. There's a nice deep dimple in the locking post suggesting that's where the pointed set screw should engage
3. There is a through hole in the locking post with internal threads at the bottom of the hole

I've attached some photos showing these matters and hope somebody can enlighten me.

 

[new_hampster]

There should be 2 pins and a small spring in the end of the post. Parts 3544 and 3545 in the repair notes. If the balance was not locked, those 3 pieces could have fallen out. Or maybe they were missing to begin with and that's why the balance was not locked. They go in order pin - spring - pin.

 

[ALR guy]

Aha, thanks new_hampster. I would love to have specs for the pins and spring so I can make them myself and not have to buy. It looks like I'm also missing 2 other parts 3543 and 3565. Explains the empty internal threads I spotted at the bottom of the locking post. I was thinking that was for the caliber 528 only (can't find Caliber 519 repair notes).