Step #1
Install valve stem.
Step #2
Install spring.
Step #3
Take top hat and install set screw.
Step #4
Take top hat and install it on valve stem.
Step #5
Adjust set screw until it is flush with top hat, and then screw top hat into valve until it stops on valve stem.
Step #6
You have completed the initial adjustment and when the top hat is pressed down should look like the picture below.
Step #7
Here is a picture of how the set screw looks in the top hat when it is at full adjustment.









