Follow the steps in the guide below to install a new diverter in a single-control kitchen faucet.
Before beginning work, turn off the water supply to your faucet.
Remove the plug button from the back of the handle. There is a small set screw located underneath the plug button.
Loosen the set screw underneath the plug button using a hex wrench to remove the handle.
Unscrew the bonnet, the dome-shaped covering, counterclockwise to expose the valve and mounting nut; the bonnet should remove easily by hand.
Firmly grasp the hub toward the base of the faucet while hold the spout and pull the entire assembly up and off of the body of the faucet. The diverter assembly is located in the back of the faucet body, facing away from you sink. It is a small black part that is inserted into a hole in the faucet body.
Using a needle nose pliers, pull out the old diverter assembly by grabbing on the "fins" of the assembly.
Insert the new diverter assembly by pressing it into the hole in the valve body with the "fins" pointed out.
Reassemble the faucet and turn the water back on. Check to ensure proper operation.