ARB RD139 - Manual (Page 13)

3 Installing the Air Locker
11
! Cover the drive pinion and axle tube areas with a rag to protect
them from metal filings.
! Drill an 11.2mm [7/16”] diameter hole through the differential
housing square to the outside surface.
! Tap the hole from the outside using !”NPT thread tap.
! Remove any sharp edges that may chip off from around the hole
and fall into the housing.
! Very carefully, remove the rags and inspect with a service light
inside the housing to ensure no metal filings are left behind.
3.3 Assembling the Seal Housing
Figure 6.
!
Make sure the grooves and airway of the seal housing are clean
and free from any contaminants (e.g. water, dirt, metal filings, etc.).
! Inspect the seal housing O-rings (supplied) for dirt, damage or
other conditions which might cause leaks.
! Generously lubricate the O-rings with oil prior to assembly, then
insert them into the grooves of the seal housing.
NOTE : When assembling the O-rings, be careful not to leave
them twisted when seated in the grooves as this could
cause excessive wear and leakage.