Arb RD138 Manuel d'utilisateur télécharger pdf (Page 13)

3 Installing the Air Locker

3.3 Drilling and Tapping the Bulkhead Port

An air line port must be drilled and tapped through the differential

housing to mount the bulkhead fitting into.

c Mark a spot on the left hand side (opposite the ring gear) toward

the top of the differential housing that is in an area well clear of the

differential, the ring gear, and any other obstructions that could

snag the seal housing tube. (Fig.6.)

Figure 6.

c Cover the drive pinion area with a rag to protect it from metal filings.

c Secure the differential housing to the work bench.

c Drill an 11.2mm [7/16”] diameter hole through the differential

housing square to the outside surface.

c Tap the hole from the outside using ¼”NPT thread tap.

c Remove any sharp edges that may chip off from around the hole

and fall into the housing.

c Very carefully, remove the rags and inspect with a service light

inside the housing to insure no metal filings are left behind.

HINT : Placing a magnet on the inside of the housing near

the hole will help to catch any debris from drilling and

tapping.

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Arb RD138 Manuel d'utilisateur Page 13