ARB RD153 - Manual (Page 19)

3 Installing the Air Locker
17
IMPORTANT:
The seal housing must still be able to freely float after the tube
is connected to the bulkhead fitting. Therefore, it is critical to
ensure that the tube is not under any tension. To avoid this
always leave the tube long enough so that a hook shape can be
formed between the seal housing and the bulkhead.
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.
F From the inside of the housing, insert the trimmed tube into the
bulkhead.
F 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.
F 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.10.), and
screw it into the bulkhead body, and lightly tighten.