ARB RD110 - Manual (Page 16)

3 Installing the Air Locker
14
3.5 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 6.
Figure 6.
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 and the differential housing (right hand side as shown in Fig.4.)
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 (See Fig 7.).
c Record this measurement.
c Consult your vehicle manufacturer’s service manual to determine
the carrier bearing preload amount specified for your vehicle.
NOTE : If your service manual specifies preload in terms of a
torque value measured off the drive pinion flange,
then assume a preload amount of 0.25mm [0.01”] for
the following calculations. Once you have assembled
the housing to check the final backlash (Refer to
Section 3.12 Checking the Backlash) you should verify
that your preload is correct using a torque wrench and
your service manual’s table of values.