ARB RD138 - Manual (Page 18)

3 Installing the Air Locker
16
3.6.1 Roll Pin Type
c If your diff has roll pins instead of locking tabs, slightly rotate the
adjuster nut so that the roll pin is in the center of one of the adjuster
nut teeth as shown. When installing the roll pin, knock it down
making sure that it will not contact the seal housing (Fig. 10.).
Figure 10.
3.6.2 Hook Type
c It may be necessary to modify the locking tab in order to clear the
seal housing by grinding or filing a small flat on the end. (See
Fig.11.)
Figure 11.
GRIND HERE