ARB RD81 - Manual (Page 21)

4 Installing the Air Locker
19
4.5.1 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 decrease the amount of backlash, reduce the shim thickness ‘D’
(Fig. 6.) and increase the shim thickness ‘E’ (Fig10.) by the same
amount. Reverse this step to increase the backlash.
Remount the differential as before.
Release spreader tension.
Check backlash again as before.
4.6 Profiling the Seal Housing Tube
Completely remove the differential spreader.
Without using sharp, jagged tools such as pliers (usually your
hands are the best tool for this job), bend the seal housing tube so
that it runs under the ring gear and upwards protruding through the
bulkhead port in the differential housing. (Fig. 12. & Fig. 13.)
Check that the contour of the tube will not interfere with the Air
Locker or the ring gear.
NOTE : It is a good idea to keep the tube away from the
bearing caps or any other part of the differential
casting as any contact due to vibration or shock may
wear the tube and eventually cause a leak.