ARB RD168 - Manual (Page 17)

3 Installing the Air Locker
15
F Select shims from the shim kit supplied with your Air Locker to
make the thickness ‘B’ as determined above.
NOTE : If necessary, shim kit ‘B’ can be made from the
standard Dana shims (not supplied) and put between
the bearing cone and bearing seat.
F Place this shim pack on the bearing cup.
F Re-measure the new distance ‘C’ from the Air Locker (now
including the shim pack ‘B’) to make sure that it matches ‘A’ on the
original differential.
NOTE : NEVER machine the Air Locker.