Replacing washer on cistern inlet valve

[planetf1]

I have an inlet valve that is allowing some water in even when the float is raised. I wanted to check the washer - presumably diaphragm, but after taking off the cap, I'm unsure how to dismantle the valve. Any tips?
The inlet came with a NUCA C211 valve.
The other option is to remove/replace the inlet, but I'd hoped a washer would do the trick (less waste, easier!)

 

[Madrab]

You would disconnect the arm off of the float then twist the top to release it from the lugs in the fill valve body, the washer should then be below. Obviously turn the water off first.

 

[planetf1]

Thanks - to disconnect the arm, do I push out the vertical rod (it's quite tight) - this would be towards the bottom of the image. Or do I try and unclip the level from the main body at the top of the valve? Just trying to understand the knack without (hopefully) breaking the plastic. Or indeed do I just unscrew that rod so that the vertical part is separated from the actual float?

 

[Exedon]

Or go mad go to screwfix spend £13 on a new fluidmaster valve and move on with life!

 

[planetf1]

Thanks for the help. removed now. First I removed the rod, but the position of the valve meant I couldn't turn anticlockwise. I then removed the arm, and was able to access the washer.!