ARB RD114 - Manual (Page 20)

3 Installing the Air Locker
18
Figure 10.
NOTE : Excessive tightening of the center compression nut is
not necessary to form a good seal around the tube
and may damage the O-ring, the seal housing tube, or
the threads of the compression nut.
NOTE : Make sure the seal housing tube is all of the way into
the center compression nut while you are tightening
it.
NOTE : Use a feeler gauge to check for clearance between the
seal housing tube and the seal housing bracket or any
moving parts.