The disc-type faucet used by American Standard, among others, has a wide
disc cartridge hidden beneath the handle and the cap. Mounting screws
hold the cartridge in the valve body. Two tight - fitting ceramic discs
with holes in them are concealed inside the cartridge. The handle slides
the top disc back and forth and from side to side over the stationary
bottom disc. This brings the holes in the disks into and out of
alignment, adjusting the flow and mix of hot and cold water.
Step 1. Turn off the hot and cold water at the stop valves, open the
faucet to let any water drain out, and plug the sink drain. Pry the (and
possibly a hot/cold indicator) off the handle with a small screwdriver
or a dull knife. Loosen the handle setscrew with a Phillips or slotted
screwdriver or an Alien wrench and remove the handle.
Step 2. Remove the chrome cap and/or a plastic or metal retaining ring
with channel-type pliers (cover the jaws with masking tape). Remove the
cylinder containing the discs, generally by first removing three long
retaining screws. Take time to line up parts in the orientation and
order in which they were installed.