Well, the Solinar is four element in three groups, while the Apotar is three elements in three groups. So when you take them apart:
The Apotar has two elements in front of the shutter, and one behind it. When removing the elements, usually the second one will come out with the first. Then you can soak them in alcohol for a week until the glue finally loosens enough to separate them.
The Solinar has three elements in front of the shutter, with the first two being a cemented pair, and one element behind the shutter. The first two elements do not need to be separated, and hopefully there is nothing in between them necessitating such a drastic measure. Again, the second element usually comes out with the front group, and the alcohol soak will have to be done.
The rear element of both lenses is secured by a slotted retaining ring that is removed with a spanner. This is done much easier if you remove the entire lens/shutter assembly from the camera, as Agfa used a baffle in most of the Silette series. It is necessary to remember the proper orientation of the rear element when you reassemble the lens.
The front elements of both lenses are in mounts, so you can't put them back together wrong. If I remember correctly, the second element is held in by the helical, and will be loose when the helical comes out, so checking the orientation is necessary just as with the rear element.
When disassembling the lens, make sure to make a reference point when the front group separates from the helical so that you can put it back in on the same thread landing. This cuts down on time spent resetting infinity focus.
For reference photos,
here is my repair of an Ansco Super Memar with the six element Soligon and Synchro-Compur. Some of the methods used on this particular model can be used on your Silette, such as removal of the lens/shutter assembly from the camera body. And then
here is my repair of a Silette Type 6 with the Compur-Rapid and Apotar. It starts out with the dis-assembly already having been done to get at the self timer mechanism, and works it's way back to a fully assembled camera. You can start at the end of the photos, and work your way forward.
Unfortunately, Flickr removed the Notes feature when they did the last rebuild of the site, so all my work in that respect is lost, and you have to kind of muddle your way through the descriptions.
PF
