ARB RD197 - Manual (Page 25)

3 Installing the Air Locker
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 Gently bend the seal housing tube into a profile that protrudes
through the bulkhead port and doesn’t pull at all on the seal
housing. (see Fig.18.)
NOTE : Ensure there is clearance between the seal housing
tube, Air Locker, seal housing bracket and cover plate.
3.8 Checking the Backlash
 Set up a depth indicator and measure the backlash as detailed in
section 2.5.1 or 2.5.2.
 Refer to your vehicle service manual for the specified maximum
and minimum amounts of backlash.
IMPORTANT :
It is critical to set up bearing pre-load when a differential is
installed. Improper pre-load will result in undue bearing wear,
increased stresses in the differential carrier, increased running
noise and ultimately, ring and pinion gear damage.
 Adjust the backlash and pre-load using an adjuster nut wrench to
tighten or loosen the adjuster nuts as required. (Refer to your
vehicle service manual.)
 Recheck backlash as before, repeating this procedure until
backlash is within the specified amount.
 Reinstall the adjuster nut locking tabs.
 A On the “Clamshell” replace the breather.
 B On the “Live Axle” tighten all bearing cap bolts with a torque
wrench to the torque specified in your vehicle manufacturer’s
service manual.
3.9 Setting Up the Bulkhead Fitting
 Apply thread sealant to the threads of the bulkhead body.
 Place the bulkhead body over the short length of tube protruding
from the housing and screw it into the tapped hole, and tighten.
 Wipe the area clean of any excess thread sealant (inside and
outside of the housing).
 From the outside of the housing, assemble the small O-ring over
the top of the short length of seal housing protruding through the
bulkhead fitting.