take the intake off that way you can get your arm dont there. take a short flat screwdriver and find the end of the snap ring. then take the spacer out. take the screwdriver and turn it sideways, then pry the cap up. you will have to go around doing this to get it to come out. be sure to clean the area good before you start. once the cap is off, you can just pull the shaft out while turning it slightly. replace gear and install. easy job should take you around 1 hour for a first time.