heehhehehe oh boy
take out the nozzle, and you will see a tiny screw in the top of it, remove the screw (DO NOT LOSE IT!!!) and then remove the spring and the valve blocker etc. from inside, noting what order and what position they were in when you remove them.
Then place them into the new nozzle and make sure that the hole on the inside lines up with the hole on the outside of the nozzle and then put the screw in
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