When working on your Kohler faucet, you must remove the bonnet to access the cartridge and O-rings. The bonnet covers the bonnet nut securing the cartridge or valve stem within the body of faucet. The bonnet is the piece between the handle and the faucet body. Removing a Kohler bonnet is the same on all Kohler faucets; however, removing the handle to access the bonnet depends on the faucet type.
Turn off the water supply valves to the faucet you are repairing. Each faucet has two water supply lines from the house to the faucet. Each line has a shut off valve between the house pipe and the faucet supply lines. Turn the shut-off valve handles clockwise to turn off the water.
Find the screw on your faucet handle that secures the handle to the faucet. Single lever handles usually have a small set screw on the back of the faucet handle. Remove the set screw with an Allen wrench and pull the handle straight off. Some single handle faucets and rotary handles have a cap on top hiding the securing screw. Locate a notch between the edge of the cap and the handle. Pry the cap off with a flat-head screwdriver to reveal the securing screw. Remove the securing screws with a Phillips-head screwdriver and pull the handle off the faucet.
Place a rubber jar lid remover pad around the bonnet and turn the bonnet counter-clockwise by hand. If the bonnet does not budge, use a pair of pliers around the rubber pad to turn the bonnet. Unscrew the bonnet completely from the faucet body.