ARB RD12 - Manual (Page 19)

4 Installing the Air Locker
17
c Set a depth indicator on one of the ring gear teeth as in figure 9.
c While supporting the pinion gear by holding the drive shaft, rotate
the differential in both directions while observing the maximum
variation in depth from the indicator (i.e., the highest value minus
the lowest value).
c Make sure backlash is less than 0.5mm.
NOTE : This backlash value is for the tube position only and
will not be used for final assembly.
Figure 9.
4.5.1 Re-Shimming the Backlash
NOTE : This step is only necessary when adjusting for
incorrect backlash.
c Reapply the spreader to the differential housing.
c Remove the bearing cap.
c Remove the differential.
c To increase the amount of backlash, reduce the shim thickness ‘D’.
(Fig. 4.) and increase the shim thickness ‘E’ (Fig.8.) by the same
amount. Reverse this step to decrease the backlash.
c Remount the differential as before.
c Release spreader tension.
c Re-check backlash.