ARB RD84 - Manual (Page 14)

3 Installing the Air Locker
12
Figure 7.
c Remove any sharp edges left behind by the modifications that
could break off and fall into the cavity.
c Make sure any grinding dust, filings or drill chips left behind by
cutting the drainage slots are completely cleaned out of the
housing.
c Check that the axle air vents are clear and working correctly.
3.2 Installing the Carrier Bearings
IMPORTANT:
GM’s 10 bolt, 30 spline axle assemblies were manufactured
using 1 of 2 different carrier bearing sizes. Measure the
outside diameter of one of the bearing cups that came off
of the original differential carrier.
Ø73.43mm [2.891”] = early model ‘small bearing’ version
Ø77.79mm [3.063”] = late model ‘large bearing’ version
If you have a small bearing axle then the carrier bearings
supplied with the Air Locker kit must be used
(Timken #LM102949-LM102911).
If you have a large bearing axle then the original bearings
will be reused (if they are of acceptable condition) or
replaced with new bearings of the same type.