Defender injection pump

Trying to bleed out fuel system after my son running it out of diesel. Not being successful so far. Then spotted this wee pipe! Anyone tell me what it is and where it connects please?
Thanks.

Closer look, not a pipe, presumably adjustment for fuel pressure regulator!
Tit. Anyway, still cant get the old b****r to start. Only got it all running again on Thursday too!!!

have you pressed the pedal 5 times till engine light flashes with ignition on,you cant bleed it as other systems

jamesmartin said:

have you pressed the pedal 5 times till engine light flashes with ignition on,you cant bleed it as other systems

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Thanks for that James, good to know. Knew you couldn’t bleed it like in the good old systems but thought it purged itself.
Must have done it by accident in a fit of temper and frustration in the end when it came down to the “right, that’s it, I’m gonna stamp on your pedal till you’re battery’s flat or you start” John Cleese type moment. So problem solved but thanks again for the advice on the correct sequence.

Made me laugh that.