Arb RD81 Manuel d'utilisateur télécharger pdf (Page 17)

4 Installing the Air Locker

4.3

Drilling and Tapping the Bulkhead Port

An airline port must be drilled and tapped through the differential

housing to mount the bulkhead fitting into.

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

housing that will be clear of the ring gear position once the seal

housing tube has been installed. Figure 8. shows how the tube will

port through the differential housing.

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.

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. (Figure 9.)

Figure 9.

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Arb RD81 Manuel d'utilisateur Page 17