Kohler K-3399 Homeowner's Manual page 8

Float Elevation
Screw
5. Unplug the Fill Valve
Perform the following steps in order to unplug the fill valve:
Shut off the water supply.
Open the circuit breaker for the toilet.
Using the supplied wrench, turn the locknut in order to release
the hook and remove the tank cover.
Remove the fill valve arm assembly by rotating it 1/8 turn
counterclockwise.
NOTE: Hold the cup firmly as the water pressure may be
unexpectedly high.
Cover the uncapped fill valve body opening with an inverted cup
in order to prevent water spray.
Turn the water supply on and off a few times in order to flush
out any blockage.
Shut off the water supply.
Use a damp cloth or sponge to remove any residue on the seal
diaphragm.
Replace the fill valve arm assembly and engage the lugs.
Rotate 1/8 turn clockwise.
Replace the tank cover.
114950-5-A
Fill Valve Body
Cover here to
Lug
prevent overspray
Seal Diaphragm
Fill Valve Arm
Assembly
Float
8 Kohler Co.