ARB RD119 - Manual (Page 22)

3 Installing the Air Locker
20
3.8 Setting Up the Bulkhead Fitting
Trim the seal housing tube that is extended through the bulkhead
port to approximately 8mm [5/16”] long using an automotive brake
line tubing cutter.
NOTE : Never use a hacksaw to cut the seal housing tube as
this will leave metal filings in the air system.
Apply thread sealant to the threads of the bulkhead body.
Screw the bulkhead body into the tapped hole, and tighten.
Wipe the area clean of any excess thread sealant (inside and
outside of the housing).
From the outside of the housing, assemble the small O-ring over
the top of the short length of seal housing tube protruding through
the bulkhead fitting.
While holding the seal housing tube into the bulkhead fitting, insert
the small drilled end of the center compression nut over the
extended tube as shown in the assembly diagram (Fig.13.), and
screw it into the bulkhead body, and lightly tighten.
NOTE : Be sure to insert the correct end of the center
compression nut into the bulkhead body. The thread
has been partially relieved on the bulkhead side of the
center compression nut to visually identify its
orientation. (Fig.13.)