ARB RD139 - Manual (Page 26)

4 Installing the Air System
24
! Screw on the outer compression nut and tighten, while supporting
the center compression nut with a 3/8” spanner. The airline is now
attached to the center compression nut.
NOTE : The outer compression nut will tighten against a stop.
Over tightening will not create a better seal.
! Assemble the support spring over the outside of the outer
compression nut.
! Secure any loose sections of tube with a cable tie.