Whether you have an older Kohler shower faucet or a newer model, the faucets will have the same basic internal parts and valve. The most common problem with a shower faucet is an occasional dripping or a leak. This problem is caused by worn or broken O rings on the cartridge, which controls the temperate and regulates the flow of water. To stop the drip or leak, you must disassemble your faucet and install a replacement cartridge.
Locate the main water valve near the outside water meter, and turn off the water supply to your house.
Open the tap on your Kohler shower faucet to release water pressure from the lines.
On older Kohler faucet models, pry off the button on the handle with a flathead screwdriver, and remove the screw securing the handle. On newer models, locate the screw under the faucet handle, and use an Allen wrench to loosen the screw. Pull the handle straight off.
Remove the escutcheon (the decorative plate behind the handle, which has two parts in new models) by unscrewing the threaded sleeve by hand and pulling the plate off the wall. In older models, remove the screws with a screwdriver, and lift the escutcheon off the wall.
Unscrew and remove the screws on the flange (the metal washer with screw holes) that fits around the valve.
Pull the valve assembly straight out, and pull the water cartridge straight out. The handle is screwed to the valve assembly.
Slide the new cartridge in place, and put the valve assembly in place, sliding the collar over it.
Replace the screws on the flange, then tighten all the screws with a screwdriver.
Reinstall the escutcheon, replace the handle, and tighten the screw.
Replace the button, depending on the model of faucet.
Turn the water supply back on, and test your Kohler faucet.