The Size of the line should have nothing to do with the pressure
applied to the cylinders as long as it can deliver the volume.
You could use a 3/4" conduct to deliver the fluid and it would
still apply the same pressure, as far as that goes, even a 1/8"
line would again, deliver the same pressure only not filling
the cylinders as fast. The reason we see a couple of different
size lines on an AD goes back to that same old thing we've run
into many times in the past, if they could save a few penny's
on each truck it was more profit for GM stock holders.
If it were me I'd just make it simple and standardize it by
running 1/4" lines through the whole system that way all the
nuts would be the same and you would be guaranteed or having
plenty of fluid volume to all cylinders.
Denny Graham
Sandwich, IL
