ARB RD158 - Manual (Page 23)

4 Installing the Air Locker
21
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.
 Again check that no part of the seal housing tube comes in contact
with the moving differential components. Less than 8mm [5/16”]
should be considered too little clearance. Gently bend the tube
away from moving parts if necessary.
4.10 Leak Testing the Air Locker
 To test the Air Locker; when 620kPa [90 PSI] shop air is applied to
the seal housing tube, the Air Locker should engage.
 Check all fittings and the seal housing for air leaks.
 Rotate the differential carrier by turning the pinion flange whilst
applying air pressure.
NOTE : An accurate way to test for air leaks is to fit a shut-off
valve to an air pressure gauge (ARB part # 0770005).
Once 620 KPA [90 PSI] is reached close the valve,
disconnect the air hose, and watch to see if there is any
drop in pressure. If so, this will indicate an air leak.
(Fig. 14.)
Figure 14.
 If a leak is found to be present, spray a soap and water mixture
onto the bulkhead air fitting. Bubbles should appear at any leak
points.