One of our showers has this American Standard single lever mixer. Lately, even with the handle turned all the way to 'hot', the water is moderately warm at best. The other faucets in this bathroom and everywhere else in the house emit sufficiently hot water, so I suspect this particular cartridge may need replacement, or maybe the temperature limit needs to be looked at.
The problem is - I don't know how to go about opening the knob. The two visible screws are obviously holding the wall-plate, but there has to be a simple (?) trick to remove the handle/knob first. Hopefully someone can recognize the model from these pictures and point me in the right direction.