adjustment screw with locking nut part of the fuel injector (1 Viewer)

[Paul Rowand]

I have this on my 81 BJ42....Question,
is the screw suppose to lock in the position (when the nut is tightened ) where it has been adjusted to?
Also....if the HAC adjusts the amount of Diesel to the injectors.....what does this Nut and Screw bolt do..? is it just a bleeder release for air...?
Mine does not lock unless both....bolt and nut are all the way in tight.....

 

[Splangy]

I’m unaware of any screws on a 3B injector. Please post pics of what you’re referring to and describe what you’re trying to accomplish.

 

[Paul Rowand]

Hi, on the far left of the picture.....just beisde the Vac hose about mid picture.....there is a slot bolt with a locking nut on it.
I thought is was to adjust the fuel flow......now I am thinking it might just be a air release when pumping up the fuel to the injectors would this be correct..? I was under the impression that you could undo the nut....back out the bolt and then lock it where you want it to be......not so, I can lock the nut and still turn the slot bolt all the way in or out no holding effect from the nut....
So, what is it for.....?