It's stuck in the casing - I've checked all the other bits of the gear mechanism and all OK.

So how do l get the plastic lever out ?

I've removed small plate to gain access to grub screw which secures it to arm to rod down leg but although arm moves on lever shaft - - the spindle of the lever appears very stiff in the casing.

Is it just the grub screw that retains the lever and it's just pull very hard or is there something else I'm missing - anybody done this ?