ARB RD81 - Manual (Page 29)

5 Installing the Air System
27
To attach the air line to the push-in fitting of the solenoid; insert the
line firmly into the fitting, pull outward on the flange of the fitting while
holding the line as far into the fitting as possible, and then gently pull
outward on the air line to clamp the line in place.
NOTE : To remove the air line from the push-in fitting; pull
outward on the flange of the fitting, push the air line as
far into the fitting as possible and hold, push inward on
the flange, and then pull the air line free of the fitting.
5.3 Connection to the Bulkhead Fitting
Trim the air line to length using a sharp knife.
Insert the support spring over the end of the air line - small end first.
(Fig.17.)
Insert the outer compression nut over the air line.
Figure 16.
Figure 17.