ARB RD110 - Manual (Page 24)

3 Installing the Air Locker
22
NOTE : Any contact due to vibration or shock could wear the
tube over time and eventually cause a leak. Keep the
tube away from any sharp edges of the bearing cap or
any other part of the differential housing.
c Check the gap between the Air Locker and any close points on the
seal housing tube with a feeler gauge to insure that adequate
clearance exists.
NOTE : Less than 8mm [5/16”] should be considered too little
clearance.
c Position the access cover in its installed position to check that no
part of the tube comes in contact with it.