ARB RD85 - Manual (Page 20)

4 Installing the Air Locker
18
4.6 Marking the Bearing Cap for Tube Clearance
With the Air Locker in place and less than 0.5mm of backlash, an
accurate measurement for the seal housing tube clearance can be
made.
NOTE : Take time and double check when taking your
measurements, as bearing caps are custom fitted to
the axle housing and cannot be replaced.
c With the seal housing tube pointing straight out, measure the
distance from a fixed position inside the differential housing to the
center of the seal housing tube.
c Record your findings and recheck for accuracy.
c Remove the bearing cap from the ring gear side of the differential.
c Spread the differential housing again (Refer to section 2.6).
c Remove the Air Locker from the differential housing.
c Release spreader tension.
c Install the seal housing side bearing cap and hand-tighten the
bearing cap bolts.
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.
c Mark the tube position on the bearing cap with a center punch.
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 5.0mm [3/16’’] from the
closest edge of the bearing cap, it is recommended that a small
hole be drilled through the bearing cap (Section 4.7.1). If less than
5.0mm [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 4.7.2).