Open your sink cabinet doors for access to the sink stopper lift assembly. If necessary, clear enough room beneath the sink to provide an adequate work space. Keep a flashlight handy for better illumination.
Locate the horizontal lever emerging from the back of the drain pipe. The lever attaches at one to the pipe and at the other end to a vertical link called the “clevis.” A knurled retaining nut secures the Kohler horizontal lever to the drain pipe. A metal clip fixes the lever to the clevis.
Rotate the knurled retaining nut to the left until it comes loose. Slip the horizontal lever free of the side of the drain pipe.
Pinch the clip at the other end of the horizontal lever, and slide the lever from the clevis.