ARB RD197 - Manual (Page 16)

3 Installing the Air Locker
14
3.2.2 B Port Location on the Live Axle Housing
 Mark a spot on the top of the outside shell of the differential
housing as shown in Figure 8.
Figure 8.
 Cover the drive pinion and axle tube areas with a rag to protect
them from metal filings.
 Drill through the housing square to the outside surface using a
11.2mm [7/16”] drill.
 Tap the hole from the outside using a ¼” NPT pipe tap.
 Remove any sharp edges from the hole that may chip-off and fall
into the housing.
 Carefully remove the rags and inspect with a service light inside the
housing to insure no metal filings are left behind.