ARB RD90 - Manual (Page 18)

3 Installing the Air Locker
16
3.5 A B Preload Shim Measurement
In order to preload the tapered roller bearings in your Air Locker,
measurements need to be taken so that a value can be calculated for
the total shim thickness ‘E’ in Figure 9.
Figure 9.
3.5.1
A Front Access Housing Preload
c Hold the bearing cups in place over their matching bearing cones.
c Insert and hold the Air Locker into the differential housing.
c Insert the shim pack determined earlier as ‘D’ between the bearing
cup (right hand side as shown in Fig.7.) and the differential
housing.
c Push (or lightly pry) the Air Locker hard across to the right-hand
side, and measure the gap (also called the ‘end float’) between the
bearing cup and the housing with a feeler gauge.
c Record this measurement.