ARB RD111 - Manual (Page 22)

3 Installing the Air Locker
20
NOTE : Excessive tightening of the center compression nut is
not necessary to form a good seal around the tube
and may damage the O-ring or the threads of the
compression nut.
3.11 Final Assembly
c Turn the shallow half of the clamshell upside down and insert the
Air Locker into the seal housing by gently lowering it through the
bearing cup and into the seal housing with a gentle twisting motion.
This will allow the O-rings to engage gently.
c Rotate the Air Locker a few turns to make sure it rotates freely and
smoothly.
c Carefully assemble the deep half of the clamshell over the top of
the Air Locker.
c Bolt the clamshell assembly closed.
c Check that some backlash can be felt between the ring and pinion
gears. No backlash would be an early indication of incorrect shim
thickness.
c The seal housing tube needs to be carefully bent so that it will stay
clear of any moving parts of the differential and not rub against any
sharp stationary edges on the clamshell (Figure 11.).
NOTE : The seal housing can be rotated slightly by lightly
tapping the oil drain holes in the flange using a drift or
pin punch.