NOTE : Use an automotive brake line tubing cutter to cut the
seal housing tube, never a hacksaw as this will leave
metal filings in the air system.
Insert the free end of the seal housing tube into the bulkhead fitting
until it protrudes approximately 8mm [5/16”] through the other side.
From the outside of the housing, assemble one of the small O-rings
over the top of the short length of seal housing tube protruding
through the bulkhead fitting.
Install the brass spacer.
Install the second small O-ring after the spacer.
While holding the seal housing tube into the bulkhead fitting, insert
the chamfered end of the center compression nut over the
extended tube as shown in the assembly diagram (Fig. 12.), and
screw it into the bulkhead body, and tighten using Pozidriv #3
screwdriver.