ARB RD131 - Manual (Page 19)

4 Installing the Air Locker
17
4.7.1 Re-Shimming the Backlash
NOTE : This step is only necessary when adjusting for
incorrect backlash.
Reapply the spreader to the differential housing.
Remove the bearing caps.
Remove the differential.
To increase the amount of backlash, reduce the shim thickness ‘D’
(Fig.4.) and increase the shim thickness ‘E’ (Fig.5.) by the same
amount. Reverse this step to decrease the backlash.
Remount the differential as before.
Release spreader tension.
Check backlash again as before.
4.8 Profiling the Seal Housing Tube
Without using sharp, jagged tools such as pliers (your hands are
the best tool for this job), bend the seal housing tube so that it runs
between the bearing cap and diff housing, around the ring gear,
and points out of the diff inline with the position of the bulkhead port
in the cover plate. Assure that the tube adequately clears all
moving parts of the differential assembly. Less than 10mm [3/8”]
should be considered too little clearance (refer to Figures 10. & 11.
for suggested tube shape).
Using the supplied cable tie, attach the seal housing tube to the
housing through the previously drilled hole. Trim the cable tie to
length. This will support the tube from vibration.
Figure 10.