Arb RD117 Manuel d'utilisateur télécharger pdf (Page 18)

3 Installing the Air Locker

3.5

Drilling and Tapping the Bulkhead Port

An airline port must be drilled and tapped through the differential

housing to mount the bulkhead fitting into.

NOTE : Higher ratio gearing uses deeper (thicker) ring gears

with teeth that extend much further. Make sure the

intended hole location is far enough away from the

ring gear teeth that the air line will not be at risk of

contact with the current or future ring gears.

 Mark a position on the top of the outside shell of the differential

housing that is about 40mm [1.5”] in from the bolt face where the

inspection cover sits and located as shown in the completed

installation in Figure 8. The bulkhead position must allow the seal

housing tube (assembled at a later time) to be clear of the ring gear

position.

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.

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Arb RD117 Manuel d'utilisateur Page 18