ARB RD100 - Manual (Page 26)

3 Installing the Air Locker
24
c Install the shim pack ‘D’ between the master shim and the seal
housing as shown in Figure 13.
c Spread the differential housing again (Refer to Section 2.6).
c Re-install the Air Locker into the axle housing.
NOTE : If the Air Locker is too tight to fully install then the
spreader tension may need to be increased. Do not
spread the housing more than 0.50mm [0.020”].
c Rotate the seal housing until the tube is positioned in the center of
the oil drainage notch of the axle housing. (Fig.19.)
Figure 19.
c Release all spreader tension.
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.