Chosen Solution
I have one of these that is about ten years old and there has been a build up of friction from dust or perhaps a lack of lube. Was breaking this down for a clean and lube / oil but cant seem to figure out how to remove the swing control knob. It is the last piece to the puzzle for removing the motor and bearing housing. I have tried to unscrew it both anti-clockwise and clockwise (which only seems to unlock / lock it to the swing motor shaft. as you would expect), but it seems to be held in by something else. There are no screws or bolts visible and I have had a feel around for a circlip but doesn’t seem to be one (and no room for one really). Has anyone got experience with these fans and have an idea how to remove? thanks
You just need to pull hard to dislodge it. Update (02/02/2018) Only the circular spring is holding it in place. Here is how the knob and oscillating assembly look like inside.