ARB RD158 - Manual (Page 26)

4 Installing the Air Locker
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4.10 Profiling the Seal Housing Tube
c Without using sharp, jagged tools such as pliers (usually your
hands are the best tool for this job), bend the seal housing tube so
that it closely follows the profile of the differential housing and
protrudes through the bulkhead port in the differential housing.
(Fig. 16.)
Figure 16.
c Check that the contour of the tube will not interfere with the ring
gear, differential, or the cover plate.
4.11 Setting up the Bulkhead Fitting
c Trim the seal housing tube that is extended outside the differential
housing to approximately 20-25mm [0.8-1.0”] of extension using an
automotive brake line tubing cutter.
NOTE : Never use a hacksaw for trimming the steel tube as
this will leave metal fillings in the air system.
c Apply thread sealant to the threads of the bulkhead body.
c Screw the bulkhead body into the tapped hole, and tighten.