temperature knob

I have a twin concealed shower valve- recently it has got incredibly stiff when turning the temperature control (bottom tap) clockwise to cold but still smooth when anticlockwise to hot. I want to try remove the tap to see if I can work out what is going on. I have removed the grub screw from...

I am trying to dismantle a Mira 88 shower control to attempt to fix the hot/cold temperature knob which has been stuck in one position (hot) for far too long. When I look at the documentation or YouTube video it seems that the temperature spindle should be removable, but mine's stuck firmly and...