ARB RD107 - Manual (Page 23)

4 Installing the Air Locker
21
NOTE : It is very important to make sure the punch marks
made on the differential housing while removing the
differential are matched to the punch marks on the
bearing cap. The bearing cap must be replaced
exactly as it was removed. (Refer to section 2.4)
c Measure to the bearing cap from exactly the same position on the
differential housing that you took the previous measurements from.
(Fig.14.)
c Mark the tube position where the clearance is to be made for the
seal housing tube with a center punch.
Figure 14.
c Remove the bearing cap from the differential housing.
c Measure the distance from the center punch mark made on the
bearing cap to the closest edge of the bearing cap.
c If the center punch mark is greater than 5mm [3/16’’] from the
closest edge of the bearing cap, it is recommended that a small
hole be drilled through the bearing cap (Section 4.7.2). If less than
5mm [3/16’’] from the edge it is recommended that a notch is filed
into the side of the bearing cap to avoid break-through while drilling
(Section 4.7.3).