After watching this video you'll be able to replace the Valve Seal on a Fluidmaster Flush Valve within a few easy steps.
1) Turn off water
2) Pull cap off of the Fluidmaster Flush Valve
3) Lift arm on Fluidmaster and turn counter clockwise
4) Remove old seal
5) Install new seal
6) Place arm with new seal into grove at top of the Fluidmaster
7) Turn clockwise until it clicks into place
8) Push cap on
9) Turn on the water
10) Flush toilet to make sure it’s working properly