The focusing on my IWS has never functioned and have started to have a go at fixing or at least finding out what the problem is by taking the front end off that houses the focus mech.
A few questions if any one can help before I go further.
Am I going to do and damage to anything internally by applying some releasing fluid to the threads that hold the locking ring C as it's very tight ?



What do the 3 screws A do ?
What does the screw B do ?





Many thanks Kevin
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