Kohler K-1913 Guide D'installation page 13

Remove the Pulley Assemblies and Mounting Brackets (cont.)
Remove the mounting bracket from the drain side of the bath.
Remove the four blue screws from the other side of the bath. Take care not to strip the screw heads.
Remove the mounting bracket from the other side of the bath.
Kohler Co. 13 1128532-2-C