This repair was simple. The two main parts you need are supplied in the upgraded replacement pulsator and the retention bolt which comes pre installed. If you’re gentle you can salvage the pulsator cap. I was forced to replace the cap as well. I recommend cleaning the internal components with a brush and some bleach. Prior to installing the replacement pieces. This repair/replacement took two minutes. The parts arrived next day from Peoria, IL. Was simple and straight forward. 10mm socket and boom done.