ARB RD90 - Manual (Page 13)

3 Installing the Air Locker
11
3.1 A B Approximate Backlash Shimming
In order to reproduce a similar preload and ring and pinion backlash in
your Air Locker to that of your existing differential, measurements
need to be taken so that a shim thickness can be calculated.
c Secure the differential to a work bench.
c Remove the bolts that hold the ring gear in place.
NOTE : Ring gear bolt locking tabs used on some models will
not be required on the Air Locker and may be
discarded.
c Using a plastic or copper hammer, tap in a circle around the ring
gear to separate it from the differential carrier.
c Remove the original bearings from the differential center using a
bearing puller.
NOTE : Keep the bearings separated so that they can be
identified as to which end of the differential they came
from.
c Examine the bearing cup and cone from Figure 6. for damage or
wear and, if necessary, discard it and replace it with the same size
and type of bearing.
Figure 6.
FACTORY DIFFERENTIAL