ARB RD85 - Manual (Page 27)

4 Installing the Air Locker
25
4.12 Bench Testing the Air Locker
c To test the Air Locker; when 620kPa [90 PSI] shop air is applied to
the seal housing tube, the Air Locker should engage.
c Check all fittings and the seal housing for air leaks.
c 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 # ALTG01).
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.
c 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.
NOTE : Do not spray this soapy mixture inside the differential.
c Check that leaky fittings have been adequately tightened.
c Disassemble, clean threads, and reapply thread sealant if leaking
persists.
c If a leak is found at the seal housing, carefully remove the seal
housing assembly and examine the O-rings. Be very careful with
the O-rings and check for defects, damage, wear, or presence of
foreign material in the O-ring grooves. Replace if necessary.