I've not yet taken a proper look but will be taking the leak off pipe off our SD4 tomorrow prior to taking an injector out.
Is the leak off pipe itself easy to take off - anything particular to look out for?
Any advice / guidance would be much appreciated
Thanks a lot
Dave

Yes it's pretty simple. Lift the black part which is a lock, then the green part which is the fitting comes off. Go carefully as the pipes become brittle with age and you don't want to have to buy a new set