Glen, Here is a Zeiss condenser with the back open showing the ball bearing which goes on the 'wheel' post (circled in red on the left) and which fits into the groove on the other side (also circled in red on the right). The bearing needs to sit on the post which also has a small spring, and when putting the two front and back pieces back together, try to ensure the bearing on the post fits into the 'grooves. The 'grooves' are positive stops for each of the different positions. As you turn the condenser, the ball depresses into the post and then the spring pops the bearing back out when the next groove is reached. Turning the round knurled adjusting wheel in the front moves the bearing and post side to side for alignment of the prisms or phase rings.
Sorry the pictures are a bit unfocused but you can see what needs to be done.
First picture with the bearing between the two halves:
- Bearing Between two halves
- Condenser Bearing.jpg (45.74 KiB) Viewed 4733 times
Next, the bearing is on the spring loaded post and shows the groove which it needs to connect with:
- Bearing on Post
- Condenser Bearing on Post and Groove.jpg (45.55 KiB) Viewed 4733 times
