Looking at the photos and the posts relating to taking the FD apart, I agree with Steve's comments.

In my case, I don't even have the option of taking the FD apart coz none of the little bits (o-rings) are available here.

FDs here are sold as complete units together with the EHA.

If my FD does end up getting replaced and solves my problem, I will keep the old one and take it apart for it's educational value.

I have done the same with my defective fuel pressure regulator, plug cables, fuel pump relay, OVP, etc.

Good to know how the stuff works internally.

My 2 cents.

Cheers.