ARB RD110 - Manual (Page 18)

3 Installing the Air Locker
16
3.6 Drilling & Tapping the Bulkhead Port
A port must be drilled and tapped through the differential housing to
allow the seal housing tube through the housing to connect with the
air line from the air compressor.
c Remove the Air Locker from the housing.
c Mark a spot on the top of the outside shell of the differential
housing in the position shown in Figure 8. The location should be
about 45mm [1.75”] from the gasket face of the cover flange and
very close to the teeth of the ring gear inside.
Figure 8.
c Cover the drive pinion and bearing seat areas with rags to protect
them from metal filings.
c Drill through the housing square to the outside surface using a
11.2mm [7/16”] drill.
c Tap the hole from the outside using a ¼” NPT pipe tap.
c Remove any sharp edges from the hole that may chip-off and fall
into the housing.
c Carefully remove the rags and inspect with a service light inside the
housing to insure no metal filings are left behind.
45mm