ARB RD121 - Manual (Page 15)

3 Installing the Air Locker
13
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 5.
Figure 5.
c Assemble the shim pack determined earlier as ‘D’ (Fig.3.) into the
bearing bore of the deep half of the clamshell.
c Using a bearing press or arbor press, press the appropriate bearing
cup into the bottom of the same bearing bore (i.e., until it stops
against the shim pack).
HINT : You should not be able to rotate the shim pack
underneath the bearing cup if it has been pressed in
far enough.
c With the deep half of the clamshell sitting firmly on a horizontal
surface, set the Air Locker into the bearing cup inside the clamshell.
c Bend the seal housing tube so that it points straight away from the
seal housing flange.
c Assemble any remaining shims from the Air Locker shim kit
(supplied) together into one shim pack and measure the total
thickness.