ARB RD85 - Manual (Page 25)

4 Installing the Air Locker
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c To increase the amount of backlash, reduce the shim thickness ‘D’
increase the shim thickness ‘E’ by the same amount. Reverse this
step to decrease the backlash.
c Remount the differential as before.
c Release spreader tension.
c Check backlash again as before.
4.10 Profiling the Seal Housing Tube
c Without using sharp, jagged tools such as pliers (usually your
hands are the best tool for this job), bend the seal housing tube so
that it closely follows the profile of the differential housing and
protrudes through the bulkhead port in the differential housing.
c Trim the tube to length using automotive brake line cutters.
c Check that the contour of the tube will not interfere with the ring
gear, differential, or the cover plate.
NOTE : It is a good idea to keep the tube away from the
bearing caps or any other part of the differential
casting as any contact due to vibration or shock may
wear the tube and eventually cause a leak.
4.11 Setting up the Bulkhead Fitting
c Apply thread sealant to the threads of the bulkhead body.
c Screw the bulkhead body into the tapped hole, and tighten.
c Wipe the area clean of any excess thread sealant (inside and
outside of the housing).
c From the outside of the housing, assemble the small O-ring over
the top of the short length of seal housing tube protruding through
the bulkhead fitting.
c While holding the seal housing tube into the bulkhead fitting, insert
the small drilled end of the center compression nut over the
extended tube as shown in the assembly diagram (Fig.13.), and
screw it into the bulkhead body, and lightly tighten.