ensign selfix 820 shutter issue

I have a ensign selfix 820. It shutter always remain open from 1/10 to 1 second. I think its shutter should be cleaned.
It is easy to remove the front element of lens. But I have no idea how to remove the second element.
Does anyone know how to remove it ?

There were slightly different versions of the Epsilon shutter, it was improved over time. The second element mount screws into the front of the shutter you'll need to make something to grip and unscrew it - maybe a Jubilee clip and some rubber strip (to prevent damage to the threads etc.

Ian