Arb RD99 User Manual download pdf (Page 14)

3 Installing the Air Locker

3.3

Drilling and Tapping the Bulkhead Port

An airline port must be drilled and tapped through the third member

casting to mount the bulkhead fitting into.

 Mark a spot on the third member casting in the position shown in

the completed assembly in Figure 5.

Figure 5.

 Remove the pinion shaft assembly from the third member.

 Press the pinion support bearing out of the third member.

 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.

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Arb RD99 User Manual Page 14