you really don't need a diagram for fixing those things once you take it apart it is pretty clear how it all fits together.. it literally consists of 3 parts ... the cam... the tension ball and the tension spring. spring and ball go in the hole... cam goes on top you will see when it is cleaned, and trust me it will pop back when your rudders hit the beach, it may even pop back when you hit some seaweed or floating debris.. the cat key is a handy tool if you can get your hands on one but once I got mine all cleaned they worked without any problem. ... the little plastic screw underneath the tension spring is to adjust that tension but I have never had to use it the amount it is able to move is so minimal that it never did any good. anyway... good luck.