ARB RD125 - Manual (Page 25)

3 Installing the Air Locker
23
3.9.1 Re-Shimming the Backlash
NOTE : This step is only necessary when adjusting for
incorrect backlash.
c Remove the bearing caps.
c Remove the differential as before.
c To decrease the amount of backlash, reduce the shim thickness ‘B’
(Fig.10.) and increase the shim thickness ‘D’ (Fig.12.) by the same
amount. Reverse this step to increase the backlash.
c Remount the differential as before.
c Release spreader tension (if applicable).
c Check backlash again as before.
3.10 Setting Up the Bulkhead Fitting
c Apply thread sealant to the threads of the bulkhead body.
c Screw the bulkhead body into the tapped hole, and tighten.
c Wipe the area clean of any excess thread sealant (inside and
outside of the housing).
c Insert the free end of the seal housing tube into the bulkhead fitting
until it protrudes approximately 8mm [5/16”] through the other side.
c From the outside of the housing, assemble the small O-ring over
the top of the short length of seal housing protruding through the
bulkhead fitting.
c While still holding the seal housing tube into the bulkhead fitting,
insert the small drilled end of the center compression nut over the
extended tube as shown in the assembly diagram (Fig.17.), and
screw it into the bulkhead body, and lightly tighten.
NOTE : Be sure to insert the correct end of the center
compression nut into the bulkhead body. The thread
has been partially relieved on the bulkhead side of the
center compression nut to visually identify its
orientation. (Fig.17.)