ARB RD137 - Manual (Page 18)

4 Installing the Air Locker
16
c Remove the Air Locker from the differential housing.
c Cover the drive pinion area with a rag to protect it from metal filings.
c Secure the differential housing to the work bench.
c Drill a 11.2mm [7/16”] diameter hole through the differential housing
square to the outside surface.
c Tap the hole from the outside using ¼”NPT thread tap.
c Remove any sharp edges that may chip off from around the hole
and fall into the housing.
c Very carefully, remove the rags and inspect with a service light
inside the housing to insure no metal filings are left behind.
4.6 Modifying the Bearing Cap
c A notch must be ground or filed in the seal housing bearing cap for
the seal housing tube to pass through (Fig. 9.).
Figure 9.
NOTE : Take time and double check when modifying the
bearing cap, as they are custom fitted to the axle
housing and cannot be replaced if damaged.
c File a chamfer around the inside edge of the notch to remove any
sharp edges from the notch that may chip-off and fall into the
housing.